Document:

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                                                                   Exhibit 10.10

                           PATENT LICENSE AGREEMENT

                                    between

                         LUCENT TECHNOLOGIES GRL CORP.

                                      and

                        WAVESPLITTER TECHNOLOGIES, INC.

                                Effective as of

                         Relating to Various Products

                            LUCENT GRL CONFIDENTIAL

    Confidential treatment has been requested for portions of this exhibit.  The
copy filed herewith omits the information subject to the confidentiality
request. Omissions are designated as *. A complete version of this exhibit
has been filed separately with the Securities and Exchange Commission.

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WS BILAT PLA-RRA - 091900

                           PATENT LICENSE AGREEMENT

                               TABLE OF CONTENTS

ARTICLE I - GRANTS OF LICENSES

 1.01 Grant
 1.02 Duration and Extent
 1.03 Scope
 1.04 Ability to Provide Licenses
 1.05 Joint Inventions
 1.06 Publicity and Confidentiality

ARTICLE II - ROYALTY AND PAYMENTS

 2.01 Royalty Calculation
 2.02 Accrual
 2.03 Exclusions
 2.04 Records and Adjustments
 2.05 Reports and Payments

ARTICLE III - TERMINATION

 3.01 Breach
 3.02 Voluntary Termination
 3.03 Survival

ARTICLE IV - MISCELLANEOUS PROVISIONS

 4.01 Disclaimer
 4.02 Nonassignability
 4.03 Addresses
 4.04 Taxes
 4.05 Choice of Law
 4.06 Integration
 4.07 Dispute Resolution
 4.08 Releases

DEFINITIONS APPENDIX

APPENDIX A

APPENDIX B

                            LUCENT GRL CONFIDENTIAL

                                       2
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WS BILAT PLA-RRA - 091900

APPENDIX C

                            LUCENT GRL CONFIDENTIAL

                                       3
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WS BILAT PLA-RRA - 091900

                           PATENT LICENSE AGREEMENT

Effective as of EXECUTION, ("the Effective Date") LUCENT TECHNOLOGIES GRL CORP.
("LUCENT GRL"), a Delaware corporation, having an office at Suite 105, 14645
N.W. 77/th/ Avenue, Miami Lakes, Florida 33014, and WAVESPLITTER TECHNOLOGIES,
INC. ("WS"), a California corporation, having an office at 46430 Fremont Blvd.,
Fremont, California 94538, agree as follows:*

                                   ARTICLE I

                              GRANTS OF LICENSES

1.01 Grant

     (a)(i)  LUCENT GRL grants to WS under LUCENT GRL's PATENTS personal,
nonexclusive and non-transferable licenses for:

               (1)  PLANAR LIGHTWAVE CHIPS;
               (2)  CASCADED FUSED FIBER COUPLERS; and
               (3)  MACH ZEHNDER INTERFEROMETERS.

     (ii) LUCENT GRL grants to WS under patents solely identified in Appendix A,
personal, nonexclusive and non-transferable licenses for OTHER OPTICAL
DEVICES/SERVICES.

     (b)  WS grants to LUCENT GRL under WS' PATENTS personal, nonexclusive,
royalty-free and non-transferable licenses for all products and services.

1.02 Duration and Extent

All licenses granted herein under any patent shall, notwithstanding the
expiration of the LIMITED PERIOD, continue for the unexpired term of such
patent, unless this Agreement or any licenses granted herein are terminated
pursuant to the provisions of Article III.

1.03 Scope

     (a)  The licenses granted herein are licenses to (i) make, have made
(subject to Section 1.03(d)), use, lease, sell, offer to sell and import
LICENSED

____________________
/*/Any term in capital letters which is defined in the Definitions Appendix
shall have the meaning specified therein.

                            LUCENT GRL CONFIDENTIAL

                                       4
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WS BILAT PLA-RRA - 091900

PRODUCTS; (ii) make, have made, use and import machines, tools, materials and
other instrumentalities, insofar as such machines, tools, materials and other
instrumentalities are involved in or incidental to the development, manufacture,
testing or repair of LICENSED PRODUCTS which are or have been made, used,
leased, owned, sold or imported by the grantee of such license; (iii) use any
method or process relating to the manufacture, packaging, assembly and/or
testing of LICENSED PRODUCTS; and (iv) convey to any customer of the grantee,
with respect to any LICENSED PRODUCT which is sold or leased by such grantee to
such customer, rights to use and resell such LICENSED PRODUCT as sold or leased
by such grantee (whether or not as part of a larger combination); provided,
however, that no rights may be conveyed to customers with respect to any
invention which is directed to (1) a combination of such LICENSED PRODUCT (as
sold or leased) with any other product, (2) a method or process which is other
than the inherent use of such LICENSED PRODUCT itself (as sold or leased), or
(3) a method or process involving the use of a LICENSED PRODUCT to manufacture
(including associated testing) any other product.

          (b)(i)  Licenses granted herein to WS are not to be construed either
(i) as consent by the grantor to any act which may be performed by the grantee,
except to the extent impacted by a patent licensed herein to the grantee, or
(ii) to include licenses to contributorily infringe or induce infringement under
U.S. law or a foreign equivalent thereof.

          (b)(ii) During the term of this Agreement, each Party agrees for
itself and its RELATED COMPANIES * under their patents (those licensed
hereunder) * under their patents * for the activities which give rise to such *.

          (c)(i)  The grant of each license hereunder includes the right to
grant sublicenses within the scope of such license to a Party's RELATED
COMPANIES for so long as they remain its RELATED COMPANIES and only to the
extent that such RELATED COMPANIES grant to the other Party licenses of similar
scope and duration as provided in this Agreement. Any such sublicense granted
hereunder may be made effective retroactively, but not prior to the Effective
Date hereof, nor prior to the sublicensee's becoming a RELATED COMPANY of such
Party. The Parties agree that if either Party forms a holding company for
patents licensed herein, that Party shall cause such holding company to grant
licenses under such patents, of the scope and duration granted herein, to the
other Party.

          (ii)    The grant of each license hereunder also includes the right of
a Party to sublicense (within the scope of its own licenses) any business which
is divested by that Party or any of its RELATED COMPANIES provided that the

                            LUCENT GRL CONFIDENTIAL

* Certain information on this page has been omitted and filed separately with
the Securities and Exchange Commission. Confidential treatment has been
requested with respected to the omitted portions.

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WS BILAT PLA-RRA - 091900

sublicense is granted within sixty (60) days of divestiture and the divested
business is itself a legal entity at the time of divestiture or within sixty
(60) days thereafter. Such sublicense may continue for so long as the divested
business remains a legal entity and shall extend only to the LICENSED PRODUCTS
sold or furnished by the divested business prior to the divestiture and only for
the patents of the non-divesting party licensed to the divesting party in this
Agreement. Furthermore, any sublicense shall not extend to the products sold or
services furnished by a third party which acquires the divested business, even
if they are of the same kind or similar to those of the divested business and
even if made, sold or provided by the divested business. Any payment obligations
of a divesting party under this Agreement shall continue in effect for all
LICENSED PRODUCTS, including the LICENSED PRODUCTS of the divested business. The
divested business shall be jointly and severally liable with the divesting party
for royalties payable on account of the LICENSED PRODUCTS of the divested
business.

     (d) The right to have product made for WS or any of its RELATED COMPANIES
pursuant to this Agreement is limited to products owned or designed by, or
otherwise within the product offerings of, WS or any of its RELATED COMPANIES.
Such have made rights shall not include the right to have "off the shelf"
products made for the Parties.  The have made rights shall not be exercised by a
Party in a manner such that the exercise of those rights is a sham to sublicense
the other Party's patents to a third party and not for bona fide business
purposes of the exercising Party.

1.04 Ability to Provide Licenses

     (a) Each Party represents it has received the rights to grant the licenses
and rights herein granted to the other.

     (b) A Party's failure to meet any obligation hereunder, due to the
assignment of title to any invention or patent, or the granting of any licenses,
to the United States Government or any agency or designee thereof pursuant to a
statute or regulation of, or contract with, such Government or agency, shall not
constitute a breach of this Agreement.

     (c) All licenses granted herein under either Party's patents or patent
applications shall be binding on any subsequent assignee or licensee of any
such patents or patent applications of such Party to the extent there are any
subsequent assignees or licensees.

1.05 Joint Inventions

     (a) There are countries (not including the United States) which require the
express consent of all inventors or their assignees to the grant of licenses or
rights under patents issued in such countries for joint inventions.

                            LUCENT GRL CONFIDENTIAL

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WS BILAT PLA-RRA - 091900

     (b) Each Party shall give such consent, or shall obtain such consent from
its RELATED COMPANIES, its employees or employees of any of its RELATED
COMPANIES, as required to make full and effective any such licenses and rights
respecting any joint invention granted to the grantee hereunder by such Party
and by another licensor of such grantee.

     (c) Each Party shall take steps which are reasonable under the
circumstances to obtain from third parties whatever other consents are necessary
to make full and effective such licenses and rights respecting any joint
invention purported to be granted by it hereunder. If, in spite of such
reasonable steps, such Party is unable to obtain the requisite consents from
such third parties, the resulting inability of such Party to make full and
effective its purported grant of such licenses and rights shall not be
considered to be a breach of this Agreement.

1.06 Publicity and Confidentiality

     (a) Nothing in this Agreement shall be construed as conferring upon either
Party or its RELATED COMPANIES any right to include in advertising, packaging or
other commercial activities related to a LICENSED PRODUCT, any reference to the
other Party (or any of its RELATED COMPANIES), its trade names, trademarks or
service marks in a manner which would be likely to cause confusion or to
indicate that such LICENSED PRODUCT is in any way certified by the other Party
hereto or its RELATED COMPANIES.

     (b) The terms, but not the existence, of this Agreement shall be treated as
confidential information by the Parties, and neither Party shall disclose such
terms to any third party (other than such Party's accountants, attorneys,  other
professional advisors and potential purchasers of a Party provided that all such
third parties are bound to keep this Agreement confidential) without the prior
written consent of the other Party; provided however, that (i) each Party may
represent to third parties that such Party is licensed for the products and
patents as provided by this Agreement; and (ii) if required by law or if such
disclosure is in response to an order of a court or an order or regulation of
another governmental body provided, however, that either Party prior to such
disclosure pursuant to such law, order or regulation shall first have promptly
informed the other Party of such law, order or regulation and made reasonable
efforts to obtain a protective order and/or appropriate confidentiality
provisions requiring that such information to be disclosed be used only for the
purpose for which such law, order or regulation was issued.  All efforts shall
also be made to redact Articles I, II The Definitions Section, and Stock Warrant
Appendices or request that such governmental body (such as SEC) make available
to the public only a redacted copy of this Agreement.

                            LUCENT GRL CONFIDENTIAL

                                       7
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WS BILAT PLA-RRA - 091900

                                  ARTICLE II

                             ROYALTY AND PAYMENTS

2.01 Royalty Calculation

     (a) In payment for the licenses, rights, and releases granted hereunder to
WS and its RELATED COMPANIES by LUCENT GRL, WS shall pay a license fee payable
in warrants in the form of a grant to Lucent-GRL of five hundred thousand
(500,000) shares of WS' Series F Preferred Stock at a price of one United States
cent (US $0.01) per share.  Such warrants shall be in  the form attached hereto
as Appendix B.  The warrants are granted to Lucent-GRL as of EXECUTION, also
referred to hereinafter as the "Grant Date", which shall not be later than
September 30, 2000.  Such warrants may be exercised at any time.

   (b) In addition to any consideration provided in Section 2.01(a) above, in
the event WS' including any of its RELATED COMPANIES' total combined gross
cumulative revenue (FAIR MARKET VALUE) attributable to the of the sale or use of
CASCADED FUSED FIBER COUPLERS and/or MACH ZEHNDER INTERFEROMETERS, exceeds *
(hereinafter referred to as the "Royalty Accrual Level"), then royalty shall
accrue and be payable to LUCENT GRL, at the applicable rate of * on each
CASCADED FUSED FIBER COUPLER and/or MACH ZEHNDER INTERFEROMETER which is sold,
leased or put into use by WS, or any of its RELATED COMPANIES after attainment
of such Royalty Accrual Level. Such royalty rate shall be applied, except as
otherwise provided in this Article II, to the FAIR MARKET VALUE of such CASCADED
FUSED FIBER COUPLERS and/or MACH ZEHNDER INTERFEROMETERS. For purposes of this
Section 2.01(b) the total combined gross cumulative revenue shall include
revenues made prior to the Effective Date of this Agreement.

   (c) In addition to any consideration provided in Section 2.01(a) above, in
the event WS' including any of its RELATED COMPANIES' total combined gross
cumulative revenue (FAIR MARKET VALUE), attributable to the sale or use of
PLANAR LIGHTWAVE CHIPS and/or OTHER OPTICAL DEVICES/SERVICES, exceeds *
(hereinafter referred to as the "Royalty Accrual Level"), then royalty shall
accrue and be payable to LUCENT GRL, at the applicable rate of * on each PLANAR
LIGHTWAVE CHIP and/or OTHER OPTICAL DEVICES/SERVICES which is sold, leased or
put into use by WS, or any of its RELATED COMPANIES after attainment of such
Royalty Accrual Level. Such royalty rate shall be applied, except as otherwise
provided in this Article II, to the FAIR MARKET VALUE of such PLANAR LIGHTWAVE
CHIPS. For purposes
                            LUCENT GRL CONFIDENTIAL

                                       8

* Certain information on this page has been omitted and filed separately with
the Securities and Exchange Commission. Confidential treatment has been
requested with respected to the omitted portions.
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WS BILAT PLA-RRA - 091900

of this Section 2.01(c) the total combined gross cumulative revenue shall
include revenues made prior to the Effective Date of this Agreement.

2.02 Accrual

     (a) Upon reaching Royalty Accrual Level in either Sections 2.01(b) and/or
(c), royalty shall accrue on any applicable LICENSED PRODUCT that has exceeded
the respective Royalty Accrual Level, upon the first sale, lease or putting into
use of such LICENSED PRODUCT and shall become payable in accordance with the
provisions of Section 2.05.  (Rebuilding or enlarging any product shall be
deemed to be a first putting into use of such product).  Obligations to pay
accrued royalties shall survive termination of licenses and rights pursuant to
Article III.

     (b) When a company ceases to be a RELATED COMPANY of WS, royalties which
have accrued with respect to any products of such company, but which have not
been paid, shall become payable with WS' next scheduled royalty payment.

     (c) Notwithstanding any other provisions hereunder, royalty shall accrue
and be payable only to the extent that enforcement of WS' obligation to pay such
royalty would not be prohibited by applicable law.

     (d) Royalties shall not accrue and sales revenue shall not be applied to
the Royalty Accrual Level, with respect to sales of LICENSED PRODUCTS made to
LUCENT GRL or any of its RELATED COMPANIES, or to any divested business that is
sublicensed by LUCENT GRL pursuant to Section 1.03(c)(ii) for so long as such
divested business remains sublicensed by LUCENT GRL.

2.03 Exclusions

     (a) A LICENSED PRODUCT may be treated by WS as not licensed and not subject
to royalty or applied to the Royalty Accrual Level with respect to sales of such
LICENSED PRODUCT if the purchaser is licensed under the same one or more patents
to have said LICENSED PRODUCT made and/or imported, and the purchaser advises
WS, in writing at or prior to the time of such sale, that it is exercising its
own license under such one or more patents with respect to such manufacture
and/or importation.  WS shall provide LUCENT GRL with a copy of any such writing
before treating any LICENSED PRODUCT as excluded, pursuant to this Section 2.03.

     (b) If WS sends a prospective customer a LICENSED PRODUCT for trial
purposes (i.e., so the customer can test the LICENSED PRODUCT prior to
purchasing it from WS) only, then such LICENSED PRODUCT shall not be subject to
royalty or applied to the Royalty Accrual Level with respect to the provisions
of Section 2.01, unless such customer purchases such LICENSED PRODUCT at which
time royalty shall accrue pursuant to Sections 2.01(b) and/or (c) and 2.02.  WS
affirms that it will not attempt to defeat paying royalties as a sham to this
Agreement by falsely claiming that LICENSED PRODUCTS were furnished for trial
purposes under this Section 2.03(b).

                            LUCENT GRL CONFIDENTIAL

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WS BILAT PLA-RRA - 091900

                            LUCENT GRL CONFIDENTIAL

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WS BILAT PLA-RRA - 091900

     (c) Upon reaching Royalty Accrual Level, any LICENSED PRODUCTS used solely
by WS or its RELATED COMPANIES for internal purposes limited to research,
development and testing of LICENSED PRODUCTS are not subject to royalty for so
long as they remain internal to WS and are only used for such limited purposes.

     (d) A LICENSED PRODUCT may be treated by WS as not licensed and not subject
to royalty to the extent that it was sold to, and the returned by, a customer
for a credit or replacement.

2.04 Records and Adjustments

     (a) WS shall keep full, clear and accurate records with respect to all
LICENSED PRODUCTS and shall furnish any information which LUCENT GRL may
reasonably prescribe from time to time to enable LUCENT GRL to ascertain the
proper royalty due hereunder on account of products sold, leased and put into
use by WS or any of its RELATED COMPANIES.  Such records should include all
records showing revenues attributable to the sale, lease or furnishing of any
LICENSED PRODUCTS prior to reaching the Royalty Accrual Level.  WS shall retain
such records with respect to each LICENSED PRODUCT for at least seven (7) years
from the sale, lease or putting into use of such LICENSED PRODUCT.  LUCENT GRL
shall have the right through its accredited auditors and at its own expense, to
make an examination, during normal business hours and upon reasonable notice and
no more than once in any twelve (12) month period, of all records and accounts
bearing upon the amount of royalty payable to it hereunder. Adjustment shall be
made within sixty (60) days to compensate for any errors or omissions disclosed
by such examination.

     (b) Independent of any such examination, LUCENT GRL will credit to WS the
amount of any overpayment of royalties made in error which is identified and
fully explained in a written notice to LUCENT GRL delivered within twelve (12)
months after the due date of the payment which included such alleged
overpayment, provided that LUCENT GRL is able to verify, to its own reasonable
satisfaction, the existence and extent of the overpayment.

     (c) No refund, credit or other adjustment of royalty payments shall be made
by LUCENT GRL except as provided in this Section 2.04.  Rights conferred by this
Section 2.04 shall not be affected by any statement appearing on any check or
other document, except to the extent that any such right is expressly waived or
surrendered by a Party having such right and signing such statement.

                            LUCENT GRL CONFIDENTIAL

                                      11

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WS BILAT PLA-RRA-091900

2.05 Reports and Payments

     (a)    Within sixty (60) days after the end of each semiannual period
ending on June 30th or December 31st, commencing with the semiannual period
during which this Agreement becomes effective, WS shall furnish to LUCENT GRL at
the address specified in Section 4.03 a statement certified by a responsible
official of WS showing in a manner acceptable to LUCENT GRL:

     (i)    all LICENSED PRODUCTS which were sold, leased or put into use during
            such semiannual period;

     (ii)   a running total of cumulative gross revenue attributable to the
            furnishing of LICENSED PRODUCTS to customers;

     (iii)  upon exceeding the Royalty Accrual Level in either Section 2.01(b)
            or 2.01(c) or both, FAIR MARKET VALUES of any such LICENSED
            PRODUCTS;

     (iii)  upon exceeding the Royalty Accrual Level in either Section 2.01(b)
            or 2.01(c) or both, the amount of royalty (see Section 2.01(b) and
            (c)) payable thereon; and

     (iv)   all exclusions from royalty pursuant to Section 2.03 including an
            explanation of the type of exclusion; and

     (v)    the net amount payable after such exclusion.

If no REPORTABLE PRODUCT has been so sold, leased or put into use, the statement
shall show that fact.

     (b)    In the event WS has exceeded the Royalty Accrual Level in Sections
Section 2.01(b) and/or (c), then within such sixty (60) days WS shall pay in
United States dollars to LUCENT GRL at the address specified in Section 4.03 the
royalties payable in accordance with such statement. Any conversion to United
States dollars shall be at the prevailing rate for bank cable transfers as
quoted for the last day of such semiannual period by leading United States banks
in New York City dealing in the foreign exchange market.

     (c)    Overdue payments hereunder shall be subject to a late payment charge
calculated at an annual rate of three percentage points (3%) over the prime rate
or successive prime rates (as posted in New York City) during delinquency. If
the amount of such charge exceeds the maximum permitted by law, such charge
shall be reduced to such maximum.

                            LUCENT GRL CONFIDENTIAL

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WS BILAT PLA-RRA-091900

     (d)  All records, reports and auditor's findings contemplated in Sections
2.04 and 2.05 will be deemed confidential information of WS and will be treated
as confidential by LUCENT GRL to the same extent the terms of this agreement are
treated confidential pursuant to Section 1.06(b) or as necessary to enforce any
rights hereunder.

                                  ARTICLE III

                                  TERMINATION

3.01 Breach

In the event of a breach of this Agreement by either Party, the other Party may,
in addition to any other remedies that it may have, at any time terminate all
licenses and rights granted by it hereunder by not less than two (2) months'
written notice specifying such breach, unless within the period of such notice
all breaches specified therein shall have been remedied.

3.02 Voluntary Termination

By written notice to the other Party, either Party may voluntarily terminate all
or a specified portion of the licenses and rights granted to it hereunder. Such
notice shall specify the effective date (not less than sixty (60) days from the
giving of said notice) of such termination and shall clearly specify any
affected patent, invention or product.

3.03 Survival

     (a)  If a company ceases to be a RELATED COMPANY of a Party, licenses and
rights granted hereunder with respect to patents of such company on inventions
made prior to the date of such cessation, shall not be affected by such
cessation.

     (b)  Any termination of licenses and rights of a Party under the provisions
of this Article III shall not affect such Party's licenses, rights and
obligations with respect to any LICENSED PRODUCT made prior to such termination,
and shall not affect the other Party's licenses and rights (and obligations
related thereto) hereunder.

                            LUCENT GRL CONFIDENTIAL

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WS BILAT PLA-RRA-091900

                                   ARTICLE IV

                            MISCELLANEOUS PROVISIONS

4.01 Disclaimer

Other than in Section 1.04, neither Party nor any of its RELATED COMPANIES makes
any representations, extends any warranties of any kind, assumes any
responsibility or obligations whatever, or confers any right by implication,
estoppel or otherwise, other than the licenses, rights and warranties herein
expressly granted.

4.02 Nonassignability

     (a) The Parties hereto have entered into this Agreement in contemplation of
personal performance, each by the other, and intend that, except as provided in
Section 1.03(c)(ii), the licenses and rights granted hereunder to a Party not be
extended to entities other than such Party's RELATED COMPANIES without the other
Party's express written consent. All of LUCENT GRL's rights, title and interest
in this Agreement and any licenses and rights granted to it hereunder may be
assigned to any RELATED COMPANY or divested business * but neither this
Agreement nor any licenses or rights hereunder shall be otherwise assignable or
transferable (in insolvency proceedings, by reason of a corporate merger, or
otherwise) by either Party without the express written consent of the other
Party.

4.03 Addresses

     (a)  Any notice or other communication hereunder shall be sufficiently
given to WS when sent by certified mail addressed to General Counsel at the WS
office specified above, or to LUCENT GRL when sent by certified mail addressed
to Contract Administrator, Intellectual Property Organization, Lucent
Technologies GRL Corporation, Suite 105, 14645 N.W. 77th Avenue, Miami Lakes,
Florida 33014, United States of America. Changes in such addresses may be
specified by written notice.

     (b)  Payments by WS shall be made to LUCENT GRL at Lucent Technologies-GRL
Corp., Chase Manhattan Bank, N.A., General Post Office, P.O. Box 6219, New York,
NY, 10087-6219, United States of America. Alternatively, payments to LUCENT GRL
may be made by bank wire transfers to LUCENT

                            LUCENT GRL CONFIDENTIAL

                                      14

* Certain information on this page has been omitted and filed separately with
the Securities and Exchange Commission. Confidential treatment has been
requested with respected to the omitted portions.
<PAGE>

WS BILAT PLA-RRA-091900

     GRL's account: Lucent Technologies GRL Corporation.  Account No. 323857752.
Swift Code: CHASUS33. ABA Code: 021000021, at Chase Manhattan Bank, N.A., New
York, New York 10087-6219, United States of America. Changes in such address or
account may be specified by written notice.

4.04 Taxes

WS shall pay any tax, duty, levy, customs fee, or similar charge ("taxes"),
including interest and penalties thereon, however designated, imposed as a
result of the operation or existence of this Agreement, including taxes which WS
is required to withhold or deduct from payments to LUCENT GRL, except (i) net
income taxes imposed upon LUCENT GRL by any governmental entity within the
United States (the fifty (50) states and the District of Columbia), and (ii) net
income taxes imposed upon LUCENT GRL by jurisdictions outside the United States
which are allowable as a credit against the United States Federal income tax of
LUCENT GRL or any of its RELATED COMPANIES. In order for the exception in (ii)
to be effective, WS must furnish to LUCENT GRL evidence sufficient to satisfy
the United States taxing authorities that such taxes have been paid. Such
evidence must be furnished to LUCENT GRL within thirty (30) days of issuance by
the local taxing authority.

4.05 Choice of Law

The Parties are familiar with the principles of New York commercial law, and
agree that the law of New York shall apply in any dispute arising with respect
to this Agreement, exclusive of conflicts of law provisions.

4.06 Integration

This Agreement sets forth the entire agreement and understanding between the
Parties as to the subject matter hereof and merges all prior discussions between
them. Neither of the Parties shall be bound by any modifications, warranties,
understandings or representations with respect to such subject matter other than
as expressly provided herein or in a writing signed with or subsequent to
execution hereof by an authorized representative of the Party to be bound
thereby. If any term or provision of this Agreement is held invalid or
unenforceable to any extent, the remainder of this Agreement will not be
affected and all other terms and provisions will be valid to the fullest extent
permitted by law.

4.07 Dispute Resolution

     (a)  If a dispute arises out of or relates to this Agreement, or the
breach, termination or validity thereof, the Parties agree to submit the dispute
to a sole

                            LUCENT GRL CONFIDENTIAL

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WS BILAT PLA-RRA-091900

mediator selected by the Parties or, at any time at the option of a Party, to

                            LUCENT GRL CONFIDENTIAL

                                      16
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WS BILAT PLA-RRA-091900

mediation by the American Arbitration Association ("AAA"). If not thus resolved,
it shall be referred to a sole arbitrator selected by the Parties within thirty
(30) days of the mediation, or in the absence of such selection, to AAA
arbitration which shall be governed by the United States Arbitration Act.

     (b)  Any award made (i) shall be a bare award limited to a holding for or
against a Party and affording such remedy as is deemed equitable, just and
within the scope of this Agreement; (ii) shall be without findings as to issues
(including but not limited to patent validity and/or infringement) or a
statement of the reasoning on which the award rests; (iii) may in appropriate
circumstances (other than patent disputes) include injunctive relief; (iv) shall
be made within four (4) months of the appointment of the arbitrator; and (v) may
be entered in any court.

     (c)  The requirement for mediation and arbitration shall not be deemed a
waiver of any right of termination under this Agreement and the arbitrator is
not empowered to act or make any award other than based solely on the rights and
obligations of the Parties prior to any such termination.

     (d)  The arbitrator shall be knowledgeable in the legal and technical
aspects of this Agreement and shall determine issues of arbitrability but may
not limit, expand or otherwise modify the terms of this Agreement.

     (e)  The place of mediation and arbitration shall be New York City.

     (f)  Each Party shall bear its own expenses but those related to the
compensation and expenses of the mediator and arbitrator shall be borne equally.

     (g)  A request by a Party to a court for interim measures shall not be
deemed a waiver of the obligation to mediate and arbitrate.

     (h)  The arbitrator shall not have authority to award punitive or other
damages in excess of compensatory damages and each Party irrevocably waives any
claim thereto.

     (i)  The Parties, their representatives, other participants and the
mediator and arbitrator shall hold the existence, content and result of
mediation and arbitration in confidence.

4.08 Releases

     (a)  In consideration of granting a warrant to purchase stock in accordance
with Section 2.01(a) and other good and valuable consideration paid by WS to
LUCENT GRL, and subject to the receipt thereof, LUCENT GRL for itself and for
its present RELATED COMPANIES, hereby releases, to the extent of its

                            LUCENT GRL CONFIDENTIAL

                                      17
<PAGE>

WS BILAT PLA-RRA-091900

right to do so, WS and its present RELATED COMPANIES under any cause of action
or claim for patent infringement arising prior to the Effective Date of this
Agreement to which the rights and licenses expressly granted under this
Agreement to WS and its present RELATED COMPANIES would be a complete defense
had this Agreement been in effect at the time such cause of action or claim
arose.

     (b)  The release in Sections 4.08(a) above, shall not operate to release
any customer of WS or customer of any of its RELATED COMPANIES who is a party to
any lawsuit involving allegations of patent infringement, patent invalidity or
patent unenforceability in which either LUCENT GRL or any of its RELATED
COMPANIES is an adverse party as of two weeks prior to the Effective Date of
this Agreement.

     (c)  WS for itself, and its present RELATED COMPANIES, hereby releases, to
the extent of its right to do so, LUCENT GRL and its present RELATED COMPANIES
under any cause of action or claim for patent infringement arising prior to the
Effective Date of this Agreement to which the rights and licenses expressly
granted under this Agreement to LUCENT GRL and their present RELATED COMPANIES
would be a complete defense had this Agreement been in effect at the time such
cause of action or claim arose.

     (d)  Subject to the extent provided in this Section 4.08, each Party
represents that it has not assigned or conveyed any right, claim or cause of
action that it purports to release hereunder.

                            LUCENT GRL CONFIDENTIAL

                                      18
<PAGE>

WS BILAT PLA-RRA-091900

IN WITNESS WHEREOF, each of the Parties has caused this Agreement to be executed
in duplicate originals by its duly authorized representatives on the respective
dates entered below.

          LUCENT TECHNOLOGIES GRL CORPORATION

          By:      /s/ Daniel P. McCurdy
                       Daniel P. McCurdy
                     Chairman of the Board

          Date: September 21, 2000

          WAVESPLITTER TECHNOLOGIES, INC.

          By:      /s/ William H. Diamond, Jr.

          Title:       William H. Diamond, Jr.

          Date: September 21, 2000

             THIS AGREEMENT DOES NOT BIND OR OBLIGATE EITHER PARTY
               IN ANY MANNER UNLESS DULY EXECUTED BY AUTHORIZED
                       REPRESENTATIVES OF BOTH PARTIES.

                            LUCENT GRL CONFIDENTIAL

                                      19
<PAGE>

WS BILAT PLA-RRA-091900

                             DEFINITIONS APPENDIX

GENERAL DEFINITIONS:

CASCADED FUSED FIBER COUPLER means any product comprising two or more FUSED
FIBER COUPLERS used in combination in a cascade to effectuate splitting or
combining of multiple optical inputs which may or may not be of different
optical wavelengths.

EXECUTION means the date the last Party signs this Contract.

FAIR MARKET VALUE means, with respect to any LICENSED PRODUCT offered for sale,
sold, leased or put into use, the greater of (i) the selling price which a
seller would realize from an unaffiliated buyer in an arm's length sale of an
identical item in the same quantity and at the same time and place as such sale,
lease or putting into use; or (ii) the selling price actually obtained for such
LICENSED PRODUCT in the form in which it is sold, whether or not assembled (and
without excluding therefrom any components or subassemblies thereof which are
included in such selling price).

In determining "selling price" the following shall be excluded:

     (a) usual trade discounts actually allowed to unaffiliated persons or
         entities;
     (b) packing costs;
     (c) costs of insurance and transportation; and
     (d) import, export, excise, sales and value added taxes, and customs
         duties.

FUSED FIBER COUPLER means any optical device formed of at least two or more
fibers, fused laterally together such that light from one is coupled into the
other and visa-versa.

LICENSED PRODUCT means, as to any grantee, any product (including any specified
combination of other products) listed for such grantee in Section 1.01.

LIMITED PERIOD means the period commencing on the effective date of this
Agreement and having a duration of *.

LUCENT GRL's PATENTS means every patent (including utility models but excluding
design patents and design registrations) issued in any country of the world
owned and controlled by LUCENT GRL or its RELATED COMPANIES prior to EXECUTION
in any country of the world, with respect to which and to the extent that LUCENT
GRL or its RELATED COMPANIES has a right, as of EXECUTION, to grant the licenses
granted herein.

                            LUCENT GRL CONFIDENTIAL

                                      20

* Certain information on this page has been omitted and filed separately with
the Securities and Exchange Commission. Confidential treatment has been
requested with respected to the omitted portions.
<PAGE>

WS BILAT PLA-RRA-091900

MACH ZEHNDER INTERFEROMETER means any interferometric device that makes use of
at least two interfering paths of different light wavelengths to resolve
wavelength differences. MACH ZEHNDER INTERFEROMETERS include *.

OTHER OPTICAL DEVICES/SERVICES means any or all products and services of which
are furnished by WS or any of its RELATED COMPANIES (subject to, the provisions
of Section 1.03(d)) other than those LICENSED PRODUCTS listed in Section
1.01(a)(i), which are either: (i) identified in Appendix C as of the Effective
Date; (ii) identified as a new product in a statement made pursuant to Section
2.05(a), provided that such newly identified product's first sale, lease or
putting into use occurred during the same semiannual period of such statement;
or (iii) added to Appendix C upon mutual written agreement of both Parties. Any
products listed in Appendix C (whether vis-a-vis (i), (ii) or (iii)), may be
eliminated from Appendix C by WS in accordance with the provisions of Section
3.02 above.

PLANAR LIGHTWAVE CHIP (PLC) means any device comprised of a substrate supporting
one or more optical waveguides * configured as an integrated passive optical
device such as those obtained by * A PLANAR LIGHTWAVE CHIP is also meant to
include a device which may incorporate one or more discrete optoelectronic
components on such PLANAR LIGHTWAVE CHIP but it does not extend to any*.

WS' PATENTS means every patent owned and controlled by WS or its RELATED
COMPANIES (including utility models but excluding design patents and design
registrations) issued prior to the end of the LIMITED PERIOD in any country of
the world with respect to which and to the extent that WS or its RELATED
COMPANIES has a right to grant the licenses granted herein.

RELATED COMPANIES of LUCENT-GRL, are its SUBSIDIARIES, Lucent Technologies Inc.
("LUCENT"), the parent of LUCENT-GRL, and wholly-owned SUBSIDIARIES of LUCENT,
other than LUCENT-GRL and any other company so designated in writing signed by
LUCENT GRL and WS.

RELATED COMPANIES of WS are any of its wholly owned SUBSIDIARIES.

SUBSIDIARY of a company means a corporation or other legal entity (i) the

                            LUCENT GRL CONFIDENTIAL

                                      21

* Certain information on this page has been omitted and filed separately with
the Securities and Exchange Commission. Confidential treatment has been
requested with respected to the omitted portions.
<PAGE>

WS BILAT PLA-RRA-091900

majority of whose shares or other securities entitled to vote for election of
directors (or other managing authority) is now or hereafter controlled by such
company either directly or indirectly; or (ii) which does not have outstanding
shares or securities but the majority of whose ownership interest representing
the right to manage such corporation or other legal entity is now or hereafter
owned and controlled by such company either directly or indirectly; but any such
corporation or other legal entity shall be deemed to be a SUBSIDIARY of such
company only as long as such control or ownership.

                            LUCENT GRL CONFIDENTIAL

                                      22
<PAGE>

WS BILAT PLA-RRA-091900

                                  APPENDIX A

U.S. Patent Nos. * and all foreign counterpart patents of the aforementioned
patents in this Appendix A.

                            LUCENT GRL CONFIDENTIAL

                                      23

* Certain information on this page has been omitted and filed separately with
the Securities and Exchange Commission. Confidential treatment has been
requested with respected to the omitted portions.
<PAGE>

                                  APPENDIX B

                                                                    EXHIBIT 4.10

THE SECURITIES REPRESENTED BY THIS CERTIFICATE HAVE BEEN ACQUIRED FOR INVESTMENT
AND HAVE NOT BEEN REGISTERED UNDER THE SECURISkadden, Arps, Slate, Meagher &
FlomFinancial Printing GroupTHE SECURITIES REPRESENTED BY THIS CERTIFICATE HAVE
BEEN ACQUIRED FOR INVESTMENT AND HAVE NOT BEEN REGISTERED UNDER THE SECURITIES
ACT OF 1933 OR ANY STATE SECURITIES LAWS.  SUCH SECURITIES MAY NOT BE SOLD OR
TRANSFERRED IN THE ABSENCE OF SUCH REGISTRATION OR AN EXEMPTION THEREFROM UNDER
SAID ACT AND ANY APPLICABLE STATE SECURITIES LAWS.

                              WARRANT TO PURCHASE

           FIVE HUNDRED THOUSAND SHARES OF SERIES F PREFERRED STOCK
                      OF WAVESPLITTER TECHNOLOGIES, INC.

                        (Void after September 30, 2005)

This certifies that Lucent Technologies - GRL Corp., 14645 N.W. 77th Avenue,
Miami Lakes, Florida 33014, Attn: Al Leonard, or its assigns (the "Holder"), for
value received, is entitled to purchase from WaveSplitter Technologies, Inc., a
California corporation (the "Company"), Five Hundred Thousand (500,000) fully
paid and nonassessable shares of the Company's Series F Preferred Stock
("Preferred Stock") for cash at a  price equal to $0.01 per share (the "Stock
Purchase Price"), at any time or from time to time up to and including 5:00 p.m.
(Pacific time) on September 30, 2005 (the "Expiration Date"), upon surrender to
the Company at its principal office at Fremont, California, (or at such other
location as the Company may advise Holder in writing) of this Warrant properly
endorsed with the Form of Subscription attached hereto duly filled in and signed
and upon payment in cash or by check of the aggregate Stock Purchase Price for
the number of shares for which this Warrant is being exercised determined in
accordance with the provisions hereof.  The Stock Purchase Price and the number
of shares purchasable hereunder are subject to adjustment as provided in Section
4 of this Warrant.

This Warrant is subject to the following terms and conditions:

     1.  Exercise; Issuance of Certificates; Payment for Shares.
         -------------------------------------------------------

         (a)   Unless an election is made pursuant to clause (b) of this Section
1, this Warrant shall be exercisable at the option of the Holder, at any time or
from time to time, on or before the Expiration Date for all or any portion of
the shares of Preferred Stock (but not for a fraction of a share) which may be
purchased hereunder for the Stock Purchase Price multiplied by the number of
shares to be purchased. In the event, however, that pursuant to the Company's
Articles of Incorporation, as amended, an event causing automatic conversion of
the Company's Preferred Stock shall have occurred prior to the exercise of this
Warrant, in whole or in part, then this Warrant shall be exercisable for the
number of shares of Common Stock of the Company into which the Preferred Stock
not purchased upon any prior exercise of the Warrant would have been so
converted (and, where the context requires, reference to "Preferred Stock" shall
be deemed to include such Common Stock). The Company agrees that the shares of
Preferred Stock purchased under this Warrant shall be and are deemed to be
issued to the holder hereof as the record owner of such shares as of the close
of business on the date on which the form of subscription shall have been
delivered and payment made for such shares. Subject to the provisions of Section
2, certificates for the shares of Preferred Stock so purchased, together with
any other securities or property to which the Holder hereof is entitled upon
such exercise, shall

                                      24

<PAGE>

be delivered to the Holder hereof by the Company at the Company's expense within
a reasonable time after the rights represented by this Warrant have been so
exercised. Except as provided in clause (b) of this Section 1, in case of a
purchase of less than all the shares which may be purchased under this Warrant,
the Company shall cancel this Warrant and execute and deliver a new Warrant or
Warrants of like tenor for the balance of the shares purchasable under the
Warrant surrendered upon such purchase to the Holder hereof within a reasonable
time. Each stock certificate so delivered shall be in such denominations of
Preferred Stock as may be reasonably requested by the Holder hereof and shall be
registered in the name of such Holder or such other name as shall be designated
by such Holder, subject to the limitations contained in Section 2.

         (b)   The Holder, in lieu of exercising this Warrant by the payment of
the Stock Purchase Price pursuant to clause (a) of this Section 1, may elect, at
any time on or before the Expiration Date, to receive that number of shares of
Preferred Stock equal to the quotient of: (i) the difference between (A) the Per
Share Price (as hereinafter defined) of the Preferred Stock, less (B) the Stock
Purchase Price then in effect, multiplied by the number of shares of Preferred
Stock the Holder would otherwise have been entitled to purchase hereunder
pursuant to clause (a) of this Section 1 (or such lesser number of shares as the
Holder may designate in the case of a partial exercise of this Warrant); over
(ii) the Per Share Price. Election to exercise under this section (b) may be
made by delivering a signed form of subscription to the Company via facsimile,
to be followed promptly by delivery of the warrant.

         (c)   For purposes of clause (b) of this Section 1, "Per Share Price"
means the product of: (i) the greater of (A) the closing price of the Company's
Common Stock as quoted by NASDAQ or listed on any exchange, whichever is
applicable, as published in the Western Edition of The Wall Street Journal for
the trading day immediately prior to the date of the Holder's election hereunder
or, (B) if applicable at the time of or in connection with the exercise under
clause (b) of this Section 1, the gross sales price of one share of the
Company's Common Stock pursuant to a registered public offering or that amount
which shareholders of the Company will receive for each share of Common Stock
pursuant to a merger, reorganization or sale of assets; and (ii) that number of
shares of Common Stock into which each share of Preferred Stock is convertible.
If the Company's Common Stock is not quoted by NASDAQ or listed on an exchange,
the Per Share Price of the Preferred Stock (or the equivalent number of shares
of Common Stock into which such Preferred Stock is convertible) shall be the
price per share which the Company would obtain from a willing buyer for shares
sold by the Company from authorized but unissued shares as such price shall be
reasonably agreed upon by the Holder and the Company or, if agreement cannot be
reached within ten (10) business days of the Holder's election hereunder, as
such price shall be determined by a panel of three (3) appraisers, one (1) to be
chosen by the Company, one (1) to be chosen by the Holder and the third to be
chosen by the first two (2) appraisers. If the appraisers cannot reach agreement
within 30 days of the Holder's election hereunder, then each appraiser shall
deliver its appraisal and the appraisal which is neither the highest nor the
lowest shall constitute the Per Share Price. In the event either party fails to
choose an appraiser within 30 days of the Holder's election hereunder, then the
appraisal of the sole appraiser shall constitute the Per Share Price. Each party
shall bear the cost of the appraiser selected by such party and the cost of the
third appraiser shall be borne one-half by each party. In the event either party
fails to choose an appraiser, the cost of the sole appraiser shall be borne one-
half by each party.

                                      25

<PAGE>

     2.  Limitation on Transfer.
         -----------------------

         (a)   The Warrant and the Preferred Stock shall not be transferable
except upon the conditions specified in this Section 2, which conditions are
intended to insure compliance with the provisions of the Securities Act. The
Warrant and the Preferred Stock and the Common Stock issuable upon conversion
thereof may be transferred only to accredited investors, as such term is defined
in Rule 501 of Regulation D under the Securities Act of 1933. Each holder of
this Warrant or the Preferred Stock or Common Stock issuable hereunder will
cause any proposed transferee of the Warrant or Preferred Stock or Common Stock
issuable upon conversion thereof to agree to take and hold such securities
subject to the provisions and upon the conditions specified in this Section 2.
Not more than five (5) shall be permitted.

         (b)   Each certificate representing (i) this Warrant, (ii) the
Preferred Stock, (iii) shares of the Company's Common Stock issued upon
conversion of the Preferred Stock and (iv) any other securities issued in
respect to the Preferred Stock or Common Stock issued upon conversion of the
Preferred Stock upon any stock split, stock dividend, recapitalization, merger,
consolidation or similar event, shall (unless otherwise permitted by the
provisions of this Section 2 or unless such securities have been registered
under the Securities Act or sold under Rule 144) be stamped or otherwise
imprinted with a legend substantially in the following form (in addition to any
legend required under applicable state securities laws):

THE SECURITIES REPRESENTED BY THIS CERTIFICATE HAVE BEEN ACQUIRED FOR INVESTMENT
AND HAVE NOT BEEN REGISTERED UNDER THE SECURITIES ACT OF 1933 OR ANY STATE
SECURITIES LAWS.  SUCH SECURITIES MAY NOT BE SOLD OR TRANSFERRED IN THE ABSENCE
OF SUCH REGISTRATION OR AN EXEMPTION THEREFROM UNDER SAID ACT AND ANY APPLICABLE
STATE SECURITIES LAWS.

         (c)   The Holder of this Warrant and each person to whom this Warrant
or the Preferred Stock or Common Stock issuable hereunder is subsequently
transferred represents and warrants to the Company (by acceptance of such
transfer) that he, she, or it is an accredited investor and that it will not
transfer the Warrant (or securities issuable upon exercise hereof unless a
registration statement under the Securities Act was in effect with respect to
such securities at the time of issuance thereof) unless and until the Company
has been provided notice of proposed disposition including its material terms
and except pursuant to (i) an effective registration statement under the
Securities Act, (ii) Rule 144 under the Securities Act (or any other rule under
the Securities Act relating to the disposition of securities), or (iii) an
opinion of counsel, reasonably satisfactory to counsel for the Company, that an
exemption from such registration is available.

     3.  Shares to be Fully Paid; Reservation of Shares.  The Company covenants
         -----------------------------------------------
and agrees that all shares of Preferred Stock which may be issued upon the
exercise of the rights represented by this Warrant will, upon issuance, be duly
authorized, validly issued, fully paid and nonassessable and free from all
preemptive rights of any shareholder and free of all taxes, liens and charges
with respect to the issue thereof.  The Company further covenants and agrees
that during the period within which the rights represented by this Warrant may
be exercised, the Company will at all times have authorized and reserved, for
the purpose of issue or transfer upon exercise of the subscription rights
evidenced by this Warrant, a sufficient number of shares of

                                      26

<PAGE>

authorized but unissued Preferred Stock, or other securities and property, when
and as required to provide for the exercise of the rights represented by this
Warrant. The Company will take commercially reasonable action to assure that
such shares of Preferred Stock may be issued as provided herein without
violation of any applicable law or regulation, or of any requirements of any
domestic securities exchange upon which the Preferred Stock may be listed. The
Company will not take any action which would result in any adjustment of the
Stock Purchase Price (as defined in Section 4 hereof) (i) if the total number of
shares of Preferred Stock issuable after such action upon exercise of all
outstanding warrants, together with all shares of Preferred Stock then
outstanding and all shares of Preferred Stock then issuable upon exercise of all
options and upon the conversion of all convertible securities men outstanding,
would exceed the total number of shares of Preferred Stock then authorized by
the Company's Articles of Incorporation, or (ii) if the total number of shares
of Common Stock issuable after such action upon the conversion of all such
shares of Preferred Stock together with all shares of Common Stock then
outstanding and then issuable upon exercise of all options and upon the
conversion of all convertible securities then outstanding would exceed the total
number of shares of Common Stock then authorized by the Company's Articles of
Incorporation.

     4.  Adjustment of Stock Purchase Price Number of Shares.  The Stock
         ----------------------------------------------------
Purchase Price and the number of shares purchasable upon the exercise of this
Warrant shall be subject to adjustment from time to time upon the occurrence of
certain events described in this Section 4. Upon each adjustment of the Stock
Purchase Price, the Holder of this Warrant shall thereafter be entitled to
purchase, at the Stock Purchase Price resulting from such adjustment, the number
of shares obtained by multiplying the Stock Purchase Price in effect immediately
prior to such adjustment by the number of shares purchasable pursuant hereto
immediately prior to such adjustment, and dividing the product thereof by the
Stock Purchase Price resulting from such adjustment.

         4.1   Subdivision or Combination of Stock.  In case the Company shall
               ------------------------------------
at any time subdivide its outstanding shares of Preferred Stock into a greater
number of shares, the Stock Purchase Price in effect immediately prior to such
subdivision shall be proportionately reduced, and conversely, in case the
outstanding shares of Preferred Stock of the Company shall be combined into a
smaller number of shares, the Stock Purchase Price in effect immediately prior
to such combination shall be proportionately increased.

         4.2   Dividends in Preferred Stock, Other Stock, Property
               ---------------------------------------------------
Reclassification.  If at any time or from time to time the holders of Preferred
----------------
Stock (or any shares of stock or other securities at the time receivable upon
the exercise of this Warrant) shall have received or become entitled to receive,
without payment therefor,

               (a)  Preferred Stock, or any shares of stock or other securities
whether or not such securities are at any time directly or indirectly
convertible into or exchangeable for Preferred Stock, or any rights or options
to subscribe for, purchase or otherwise acquire any of the foregoing by way of
dividend or other distribution, or

               (b)  any cash paid or payable otherwise than as a cash dividend,
or

               (c)  Preferred Stock or other or additional stock or other
securities or property (including cash) by way of spinoff, split-up,
reclassification, combination of shares or

                                      27

<PAGE>

similar corporate rearrangement, (other than shares of Preferred Stock issued as
a stock split, adjustments in respect of which shall be covered by the terms of
Section 4.1 above). Then and in each such case, the Holder hereof shall, upon
the exercise of this Warrant, be entitled to receive, in addition to the number
of shares of Preferred Stock receivable thereupon, and without payment of any
additional consideration therefore, the amount of stock and other securities and
property (including cash in the cases referred to in clauses (b) and (c) above)
which such Holder would hold on the date of such exercise had he been the holder
of record of such Preferred Stock as of the date on which holders of Preferred
Stock received or became entitled to receive such shares and/or all other
additional stock and other securities and property.

         4.3   Reorganization, Reclassification, Consolidation, Merger or Sale.
               ----------------------------------------------------------------
If any capital reorganization of the capital stock of the Company, or any
consolidation or merger of the Company with another corporation, or the sale of
all or substantially all of its assets to another corporation shall be effected
in such a way that holders of Preferred Stock shall be entitled to receive
stock, securities or assets with respect to or in exchange for Preferred Stock,
then, as a condition of such reorganization, reclassification, consolidation,
merger or sale, lawful and adequate provisions shall be made whereby the holder
hereof shall thereafter have the right to purchase and receive(in lieu of the
shares of the Preferred Stock of the Company immediately theretofore purchasable
and receivable upon the exercise of the rights represented hereby) such shares
of stock, securities or assets as may be issued or payable with respect to or in
exchange for a number of outstanding shares of such Preferred Stock equal to the
number of shares of such stock immediately theretofore purchasable and
receivable upon the exercise of the rights represented hereby.  In any such
case, appropriate provision shall be made with respect to the rights and
interests of the holder of this Warrant to the end that the provisions hereof
(including, without limitation, provisions for adjustments of the Stock Purchase
Price and of the number of shares purchasable and receivable upon the exercise
of this Warrant) shall thereafter be applicable, as nearly as may be possible,
in relation to any shares of stock, securities or assets thereafter deliverable
upon the exercise hereof.

         4.4   Anti-Dilution Provisions. The Holder hereof shall be entitled,
               -------------------------
with respect to the shares of Series F Preferred Stock issued upon exercise
hereof, to the anti-dilution protection provided to such class of stock as
described in the Company's Amended and Restated Articles of Incorporation.  This
protection shall apply to Holder prior to the exercise of this Warrant.

         4.5   Notice of Adjustment. Upon any adjustment of the Stock Purchase
               ---------------------
Price, and/or any increase or decrease in the number of shares purchasable upon
the exercise of this Warrant the Company shall give written notice thereof, by
first class mail, postage prepaid, addressed to the registered holder of this
Warrant at the address of such holder as shown on me books of the Company. The
notice, which may be substantially in me form of Exhibit "A" attached hereto,
shall be signed by the Company's chief financial officer and shall state the
Stock Purchase Price resulting from such adjustment and the increase or
decrease, if any, in the number of shares purchasable at such price upon the
exercise of this Warrant, setting forth in reasonable detail the method of
calculation and the facts upon which such calculation is based.

         4.6   Other Notices.  If at any time:
               --------------

               (a)  the Company shall declare any cash dividend upon its
Preferred

                                       28

<PAGE>

Stock;

               (b)  the Company shall declare any dividend upon its Preferred
Stock payable in stock or make any special dividend or other distribution to the
holders of its Preferred Stock;

               (c)  there shall be any capital reorganization or
reclassification of the capital stock of the Company, or consolidation or merger
of the Company with, or sale of all or substantially all of its assets to,
another corporation;

               (d)  there shall be a voluntary or involuntary dissolution,
liquidation or winding-up of the Company; or

               (e)  the Company shall take or propose to take any other action,
notice of which is actually provided to holders of the Preferred Stock (except
the voting of Preferred Stock on matters other than items (a) though (e));
then, in any one or more of said cases, the Company shall give, by first class
mail, postage prepaid, addressed to the holder of this Warrant at the address of
such holder as shown on the books of the Company, (i) at least 20 day's prior
written notice of the date on which the books of the Company shall close or a
record shall be taken for such dividend or distribution rights or for
determining rights to vote in respect of any such reorganization,
reclassification, consolidation, merger, sale, dissolution, liquidation or
winding-up, or other action and (ii) in the case of any such reorganization,
reclassification, consolidation, merger, sale, dissolution, liquidation or
winding-up, or other action, at least 20 day's written notice of the date when
the same shall take place.  Any notice given in accordance with the foregoing
clause (i) shall also specify, in the case of any such dividend or distribution
the date on which the holders of Preferred Stock shall be entitled thereto.  Any
notice given in accordance with the foregoing clause (ii) shall also specify the
date on which the holders of Preferred Stock shall be entitled to exchange their
Preferred Stock for securities or other property deliverable upon such
reorganization, reclassification, consolidation, merger, sale, dissolution,
liquidation or winding-up, or other action as the case may be.

         4.7   Certain Events.  If any change in the outstanding Preferred Stock
               ---------------
of the Company or any other event occurs as to which the other provisions of
this Section 4 are not strictly applicable or if strictly applicable would not
fairly protect the purchase rights of the Holder of the Warrant in accordance
with the essential intent and principles of such provisions, then the Board of
Directors of the Company shall make an adjustment in the number and class of
shares available under the Warrant, the Stock Purchase Price and/or the
application of such provisions, in accordance with such essential intent and
principles, so as to protect such purchase rights as aforesaid.  The adjustment
shall be such as will give the Holder of the Warrant upon exercise for the same
aggregate Stock Purchase Price the total number, class and kind of shares as he
would have owned had the Warrant been exercised prior to the event and had he
continued to hold such shares until after the event requiring adjustment.

     5.  Issue Tax.  The issuance of certificates for shares of Preferred Stock
         ----------
upon the exercise of the Warrant shall be made without charge to the Holder of
the Warrant for any issue tax in respect thereof; provided, however, that the
Company shall not be required to pay any tax which may be payable in respect of
any transfer involved in the issuance and delivery of any

                                       29

<PAGE>

certificate in a name other than that of the then Holder of the Warrant being
exercised.

     6.  Closing of Books.  The Company will at no time close its transfer books
         -----------------
against the transfer of any Warrant or of any shares of Preferred Stock issued
or issuable upon the exercise of any warrant in any manner which interferes with
the timely exercise of this Warrant.

     7.  No Voting or Dividend Rights; Limitation of Liability.  Nothing
         ------------------------------------------------------
contained in this Warrant shall be construed as conferring upon the Holder
hereof the right to vote or to consent as a shareholder in respect of meetings
of shareholders for the election of directors of the Company or any other
matters or any rights whatsoever as a shareholder of the Company. No dividends
or interest shall be payable or accrued in respect of this Warrant or the
interest represented hereby or the shares purchasable hereunder until, and only
to the extent that, this Warrant shall have been exercised. No provisions
hereof, in the absence of affirmative action by the holder to purchase shares of
Preferred Stock, and no mere enumeration herein of the rights or privileges of
the Holder hereof, shall give rise to any liability of such Holder for the Stock
Purchase Price or as a shareholder of the Company, whether such liability is
asserted by the Company or by its creditors.

     8.  Registration Rights.  The Holder hereof shall be entitled, upon
         --------------------
execution of an amendment to the Fifth Amended and Restated Rights Agreement
(the "Rights Agreement") with respect to the shares of Preferred Stock issued
upon exercise hereof or the shares of Common Stock or other securities issued
upon conversion of such Preferred Stock as the case may be, to all of the
registration rights set forth in the Rights Agreement to the same extent and on
the same terms and conditions as possessed by the Investors thereunder.

     9.  Rights and Obligations Survive Exercise of Warrant.  The rights and
         ---------------------------------------------------
obligations of the Company, of the Holder of this Warrant and of the holder of
shares of Preferred Stock issued upon exercise of this Warrant, contained in
Sections 6 and 8 shall survive the exercise of this Warrant.

     10. Modification and Waiver.  This Warrant and any provision hereof may be
         ------------------------
changed, waived, discharged or terminated only by an instrument in writing
signed by the party against which enforcement of the same is sought.

     11. Notices.  Any notice, request or other document required or permitted
         --------
to be given or delivered to the holder hereof or the Company shall be deemed to
have been given (i) upon receipt if delivered personally or by courier (ii) upon
confirmation of receipt if by telecopy or (iii) three business days after
deposit in the US mail, with postage prepaid and certified or registered, to
each such holder at its address as shown on the books of the Company or to the
Company at the address indicated therefor in the first paragraph of this
Warrant.

     12. Binding Effect on Successors.  This Warrant shall be binding upon any
         -----------------------------
corporation succeeding the Company by merger, consolidation or acquisition of
all or substantially all of the Company's assets unless otherwise agreed by the
Holder. All of the obligations of the Company relating to the Preferred Stock
issuable upon the exercise of this Warrant shall survive the exercise and
termination of this Warrant All of the covenants and agreements of the Company
shall inure to the benefit of the successors and assigns of the holder hereof.
The Company will, at the time of the exercise of this Warrant, in whole or in
part, upon

                                      30

<PAGE>

request of the Holder hereof but at the Company's expense, acknowledge in
writing its continuing obligation to the Holder hereof in respect of any rights
(including, without limitation, any right to registration of the shares of
Common Stock) to which the holder hereof shall continue to be entitled after
such exercise in accordance with this Warrant; provided, that the failure of the
holder hereof to make any such request shall not affect the continuing
obligation of the Company to the Holder hereof in respect of such rights.

     13. Descriptive Headings and Governing Law.  The descriptive headings of
         ---------------------------------------
the several sections and paragraphs of this Warrant are inserted for convenience
only and do not constitute a part of this Warrant. This Warrant shall be
construed and enforced in accordance with, and the rights of the parties shall
be governed by, the laws of the State of California, as applied to agreements
made and performed in California by residents thereof without regard to the
conflicts of laws principles of such state.

     14. Lost Warrants or Stock Certificates.  The Company represents and
         ------------------------------------
warrants to the Holder hereof that upon receipt of evidence reasonably
satisfactory to the Company of the loss, theft, destruction, or mutilation of
any Warrant or stock certificate and, in the case of any such loss, theft or
destruction, upon receipt of an indemnity reasonably satisfactory to the
Company, or in the case of any such mutilation upon surrender and cancellation
of such Warrant or stock certificate, the Company at its expense will make and
deliver a new Warrant or stock certificate, of like tenor, in lieu of the lost,
stolen, destroyed or mutilated Warrant or stock certificate.

     15. Fractional Shares.  No fractional shares shall be issued upon exercise
         ------------------
of this Warrant.  The Company shall, in lieu of issuing any fractional share,
pay the holder entitled to such fraction a sum in cash equal to such fraction
multiplied by the then effective Stock Purchase Price.

     16. Representations of Holder.  With respect to this Warrant, Holder
         --------------------------
represents and warrants to the Company as follows:

         16.1   Experience.  It is experienced in evaluating and investing in
                -----------
companies engaged in businesses similar to that of the Company; it understands
that investment in the Warrant involves substantial risks; it has made detailed
inquiries concerning the Company, its business and services, its officers and
its personnel; the officers of the Company have made available to Holder any and
all written information it has requested; the officers of the Company have
answered to Holder's satisfaction all inquiries made by it; in making this
investment it has relied upon information made available to it by the Company;
and it has such knowledge and experience in financial and business matters that
it is capable of evaluating the merits and risks of investment in the Company
and it is able to bear the economic risk of that investment.

          16.2  Investment.  It is acquiring the Warrant for investment for its
                -----------
own account and not with a view to, or for resale in connection with, any
distribution thereof.  It understands that the Warrant, the shares of Preferred
Stock issuable upon exercise thereof and the shares of Common Stock issuable
upon conversion of the Preferred Stock, have not been registered under the
Securities Act of 1933, as amended, nor qualified under applicable state
securities laws.

          16.3  Rule 144.  It acknowledges that the Warrant, the Preferred Stock
                ---------
and the Common Stock must be held indefinitely unless they are subsequently
registered under the

                                      31

<PAGE>

Securities Act or an exemption from such registration is available. It has been
advised or is aware of the provisions of Rule 144 promulgated under the
Securities Act.

          16.4  Access to Data.  It has had an opportunity to discuss the
                ---------------
Company's business, management and financial affairs with the Company's
management and has had the opportunity to inspect the Company's facilities.

          16.5  Accredited Investor.  It is an accredited investor as such term
                --------------------
is defined in Rule 501 of Regulation D of the Securities Act of 1933.

     17.  Additional Representations and Covenants of the Company.  The Company
          --------------------------------------------------------
hereby represents, warrants and agrees as follows:

          17.1  Corporate Power.  The Company has all requisite corporate power
                ----------------
and corporate authority to issue this Warrant and to carry out and perform its
obligations hereunder.

          17.2  Authorization.  All corporate action on the part of the Company,
                --------------
its directors and shareholders necessary for the authorization, execution,
delivery and performance by the Company of this has been taken.  This Warrant is
a valid and binding obligation of the Company, enforceable in accordance with
its terms, except as enforcement may be limited by bankruptcy, insolvency and
similar laws affecting the enforcement of creditors' rights in general and
subject to general principals of equity.

          17.3  Offering.  Subject in part to the truth and accuracy of Holder's
                ---------
representations set forth in Section 17 hereof, the offer, issuance and sale of
the Warrant is, and the issuance of Preferred Stock upon exercise of the Warrant
and the issuance of Common Stock upon conversion of the Preferred Stock will,
under current law and assuming no transfer, be exempt from the registration
requirements of the Securities Act, and are exempt from the qualification
requirements of any applicable state securities laws; and neither the Company
nor anyone acting on its behalf will take any action hereafter that would cause
the loss of such exemptions.

          17.4  Stock Issuance.  Upon exercise of the Warrant, the Company will
                ---------------
use its best efforts to cause stock certificates representing the shares of
Preferred Stock purchased pursuant to the exercise to be issued in the
individual names of Holder, its nominees or assignees, as appropriate at the
time of such exercise. Upon conversion of the shares of Preferred Stock to
shares of Common Stock, the Company will issue the Common Stock in the
individual names of Holder, its nominees or assignees, as appropriate.

          17.5  Articles and By-Laws.  The Company has provided Holder with, or
                ---------------------
made available to Holder, true and complete copies of the Company's Articles or
Certificate of Incorporation, By-Laws, and each Certificate of Determination or
other charter document setting, forth any rights, preferences and privileges of
Company's capital stock, each as amended and in effect on the date of issuance
of this Warrant.

           17.6 Conversion of Preferred Stock.  As of the date hereof, each
          ------------------------------------
share of the Preferred Stock is convertible into one share of the Common Stock.

                                       32
<PAGE>

IN WITNESS WHEREOF, the Company has caused this Warrant to be duly executed by
its officers, thereunto duly authorized this 21st day of September , 2000.

                                          WAVESPLITTER TECHNOLOGIES, INC.

                                                /s/ Bruce C. Rollock
                                          By:____________________________

                                                Vice President,Chief
                                                Financial Officer, Secretary
                                                and Treasurer
                                          Title:_________________________

                                      33

<PAGE>

                              FORM OF SUBSCRIPTION
                  (To be signed only upon exercise of Warrant)

To:  _________________________

[_]       The undersigned, the holder of the within Warrant, hereby irrevocably
elects to exercise the purchase right represented by such Warrant for, and to
purchase thereunder, (1) See Below _____________________ (________) shares (the
"Shares") of Stock of ____________ and herewith makes payment of_______________
Dollars ($____________) therefor, and requests that the certificates for such
shares be issued in the name of, and delivered to, __________________________,
whose address is __________________________________.

[_]       The undersigned hereby elects to convert _________________________
percent (_________%) of the value of the Warrant pursuant to the provisions of
Section l(b) of the Warrant.

The undersigned represents that it is acquiring such stock for its own account
for investment and not with a view to or for sale in connection with any
distribution thereof (subject, however, to any requirement of law that the
disposition thereof shall at all times be within its control).  The undersigned
further affirms as of the date of this election, each of the representations and
warranties of Section 17 of the Warrant.

                                       Dated: _________________________________
                                       Holder: ________________________________
                                       By:  ___________________________________
                                       Its: ___________________________________
                                       (Signature must conform to name of Holder
                                       exactly as specified on the face of the
                                       Warrant or as specified in an Assignment)

                                       (Address)

                                       _______________________________________
                                       _______________________________________

(1)  Insert here the number of shares called for on the face of the Warrant (or,
     in the case of a partial exercise, the portion thereof as to which the
     Warrant is being exercised), in either case without making any adjustment
     for additional Preferred Stock or any other stock or other securities or
     property or cash which, pursuant to the adjustment provisions of the
     Warrant, may be deliverable upon exercise.

                                   ASSIGNMENT

FOR VALUE RECEIVED, the undersigned, the holder of the within Warrant, hereby
sells, assigns and transfers all of the rights of the undersigned under the
within Warrant, with respect to the number of shares of Preferred Stock covered
thereby set forth hereinbelow, unto:

                                       34

<PAGE>

<TABLE>
<CAPTION>

<S>                                 <C>                                                      <C>
       Name of Assignee                                    Address                                 Number of Shares
-------------------------------     ----------------------------------------------------     --------------------------

</TABLE>

                                   Dated: _________________________________
                                   Holder: ________________________________
                                   By: ____________________________________
                                   Its: ___________________________________
                                   (Signature must conform to name of Holder
                                   exactly as specified on the face of the
                                   Warrant or as specified in an Assignment)

                                      35

<PAGE>

          WS BILAT PLA-RRA-091900

                                  APPENDIX C

                          [intentionally left blank]

                            LUCENT GRL CONFIDENTIAL

                                      36<PAGE>

                                                                   EXHIBIT 10.11

                              PURCHASE AGREEMENT
                              ------------------

     This PURCHASE AGREEMENT (the "Agreement") is made as of the 15th day of
November, 2000, by and between CORVIS Corporation ("CORVIS"), a Delaware
corporation, and WaveSplitter Technologies, Inc. ("VENDOR"), a California
corporation.

                                    RECITAL

     CORVIS desires to purchase from VENDOR and VENDOR desires to supply to
     CORVIS certain components.

     NOW, THEREFORE, in consideration of the representations, warranties,
     promises, mutual covenants and agreements of the parties contained in this
     Agreement and for other good and valuable consideration, the receipt and
     sufficiency of which are hereby acknowledged, and intending to be legally
     bound, CORVIS and VENDOR agree as follows:

                            ARTICLE 1 - DEFINITIONS
                            -----------------------

     Capitalized terms shall have the meanings set forth in Appendix 1 to the
Agreement.

                             ARTICLE 2 - PRODUCTS
                             --------------------

     2.1. Products.  VENDOR shall process and manufacture the products listed on
          --------
Attachment 1 hereto (the "Products") for CORVIS in accordance with such
Product's Manufacturing Standards and shall deliver to CORVIS such Products in
compliance with the Product Quality Specifications.

     2.2. Annual Minimum Purchase Commitments.  Notwithstanding any Rolling
          -----------------------------------
Forecast, CORVIS will: (i) for each of the two consecutive calendar halves
beginning January 1, 2001, purchase for delivery in that respective half a
quantity of VENDOR's Products whose aggregate purchase price is at least Six
Million Five Hundred Thousand U.S. Dollars; (ii) for each of the two consecutive
calendar halves beginning January 1, 2002, purchase for delivery in that
respective half a quantity of VENDOR's Products whose aggregate purchase price
is at least Ten Million and Fifteen Million U.S. Dollars, respectively; and,
(iii) for each of the two consecutive calendar halves beginning January 1, 2003,
purchase for delivery in that respective half a quantity of VENDOR's Products
whose aggregate purchase price is at least Six Million U.S. Dollars; provided,
that, if (a) VENDOR fails to deliver any Products within two weeks after the
applicable Delivery Window (as specified in Section 4.2), and (b) CORVIS orders
substitute products from a third party to replace the Products that Vendor so
failed to deliver, then CORVIS shall receive a credit toward CORVIS' obligations
in this Section 2.2 in an amount equal to the purchase price of the VENDOR
Products not delivered within two weeks after such Delivery Window. For purposes
of this Section 2.2., Products delivered to Corvis pursuant to Purchase Orders
outstanding as of the effective date of this Agreement will be deemed to have
been purchased when delivered.

     2.3. Failure to Meet Annual Minimum Purchase Commitment.
          --------------------------------------------------

                                      -1-

* Confidential treatment has been requested for portions of this exhibit. The
copy filed herewith omits the information subject to the confidentiality
request. Omissions are designated as *. A complete version of this exhibit
has been filed separately with the Securities and Exchange Commission.

<PAGE>

          (1) (a) If, in 2002, CORVIS fails to purchase for delivery in 2002 a
          quantity of VENDOR's Products whose aggregate purchase price is equal
          to or exceeds Twenty Five Million U.S. Dollars, then VENDOR may
          immediately invoice CORVIS for an amount equal to fifty percent (50%)
          of the difference between Twenty Five Million U.S. Dollars and the
          aggregate purchase price of all Products actually purchased for
          delivery in 2002 by CORVIS (such difference being the "Annual Minimum
          Purchase Commitment Shortfall"). CORVIS will pay such invoice within
          thirty (30) days after receipt of invoice.

               (b) (If CORVIS fails, in any calendar quarter of 2002, to
          purchase for delivery in that respective quarter a quantity of
          VENDOR's Products whose aggregate purchase price is at least Three
          Million U.S. Dollars, then the remainder of this Section 2.3.(1)(b)
          will be invalid, and of no force or effect.) If CORVIS submits
          Purchase Orders for at least the amount of the Annual Minimum Purchase
          Commitment Shortfall within such 30 day payment period referenced in
          Section 2.3.(1)(a), above, and such Purchase Orders requests delivery
          of VENDOR Products within three (3) calendar months, CORVIS will
          receive, for application against such Purchase Orders, a credit for
          the full amount of the payment made for the Annual Minimum Purchase
          Commitment Shortfall. In the event that the amount paid by CORVIS with
          respect to the Annual Minimum Purchase Commitment Shortfall is not
          fully utilized as credit against Purchase Orders issued within such
          thirty (30) day period, CORVIS will receive a credit equal to eighty
          percent (80%) of the remaining amount, which credit may be used to pay
          for purchases of Products for delivery within four (4) calendar months
          after the end of the calendar year in which the shortfall occurred.
          Any credit given pursuant to this section shall be applied first to
          satisfy CORVIS' obligations for the year in which the Annual Minimum
          Purchase Commitment Shortfall existed, to the extent of such
          shortfall. Any excess amount shall apply against Corvis' obligations
          in the period in which such Purchase Order was issued.

          (2) (a) If, in 2003, CORVIS fails to purchase for delivery in 2003 a
          quantity of VENDOR's Products whose aggregate purchase price is equal
          to or exceeds Twelve Million U.S. Dollars, then VENDOR may immediately
          invoice CORVIS for an amount equal to ten percent (10%) of the
          difference between Twelve Million U.S. Dollars and the aggregate
          purchase price of all Products actually purchased for delivery in 2003
          by CORVIS (such difference being the "Annual Minimum Purchase
          Commitment Shortfall"). CORVIS will pay such invoice within thirty
          (30) days after receipt of invoice.

          (b) (If CORVIS fails, in any calendar quarter of 2003, to purchase for
          delivery in that respective quarter a quantity of VENDOR's Products
          whose aggregate purchase price is at least Two Million U.S. Dollars,
          then the remainder of this Section 2.3.(2)(b) will be invalid, and of
          no force or effect.) If CORVIS submits Purchase Orders for at least
          the amount of the Annual Minimum Purchase Commitment Shortfall within
          such 30 day payment period referenced in Section 2.3.(2)(a), above,
          and such Purchase Orders requests delivery of VENDOR Products within
          three (3) calendar months, CORVIS

                                      -2-

<PAGE>

          will receive, for application against such Purchase Orders, a credit
          for the full amount of the payment made for the Annual Minimum
          Purchase Commitment Shortfall. In the event that the amount paid by
          CORVIS with respect to the Annual Minimum Purchase Commitment
          Shortfall is not fully utilized as credit against Purchase Orders
          issued within such thirty (30) day period, CORVIS will receive a
          credit equal to eighty percent (80%) of the remaining amount, which
          credit may be used to pay for purchases of Products for delivery
          within four (4) calendar months after the end of the calendar year in
          which the shortfall occurred. Any credit given pursuant to this
          section shall be applied first to satisfy CORVIS' obligations for the
          year in which the Annual Minimum Purchase Commitment Shortfall
          existed, to the extent of such shortfall. Any excess amount shall
          apply against Corvis' obligations in the period in which such Purchase
          Order was issued.

     2.4. Quantity. By the seventh business day of each month (the month
hereafter being "M"), CORVIS shall provide to VENDOR a twelve-month rolling
forecast (the "Rolling Forecast") of deliveries for the twelve-month period
commencing at the beginning of the next month. The first month of each Rolling
Forecast (hereafter "M+1") shall include the quantity of each product, by
product code, to be delivered during M+1 and the target delivery date for each
shipment to be made during M+1. The remaining months of each Rolling Forecast
(M+2 through M+12) shall contain the quantity of each product by product code
which CORVIS anticipates will be delivered during the specified month. The first
month of the Rolling Forecast shall represent a binding commitment to order and
CORVIS shall submit a Purchase Order for * no later than the seventh business
day of M for delivery in the following month (M +1). The forecast issued in M
for the second month of each Rolling Forecast (M+2) shall be partially binding
in that in the next subsequent Rolling Forecast (in which M+1 has become M and
M+2 has become M+1), the quantity of each product, by product code, to be
delivered in M+1 and the corresponding Purchase Order shall be not less than *
of the quantity forecast for such month in the immediately preceding Rolling
Forecast. The forecast issued in M for the third month of each Rolling Forecast
(M+3) shall be partially binding in that in the next subsequent Rolling Forecast
(in which M+1 has become M, M+2 has become M+1 and M+3 has become M+2), the
quantity of each product, by product code, to be delivered in M+2 and the
corresponding Purchase Order shall be not less than * of the quantity forecast
for such month in the immediately preceding Rolling Forecast for M+3.

                                      -3-

* Certain information on this page has been omitted and filed separately with
the Securities and Exchange Commission. Confidential treatment has been
requested with respect to the omitted portions.

<PAGE>

     2.5. Capacity.  VENDOR shall accept Purchase Orders for delivery in M+1 of
          --------
Products designated in a Rolling Forecast delivered by the seventh business day
of M, provided that VENDOR shall not be obligated to deliver more than * of
the amount  of that product code that was scheduled to be delivered to CORVIS in
the immediately preceding Rolling Forecast.  VENDOR shall make commercially
reasonable efforts to maintain sufficient capacity to process, manufacture, and
deliver the Products VENDOR is obligated to deliver to CORVIS under this
Agreement, within the delivery times set out in Section 4.2.  For increases of
units of a Product in any given month in the Rolling Forecast that exceed *
of the units of that Product in that month in the then-preceding Rolling
Forecast, the parties shall meet and discuss the delivery obligations of VENDOR;
VENDOR will have no obligation to accept Orders for that excess unless the
parties mutually agree.  The parties will also agree to the first Rolling
Forecast delivered under this Agreement.

     2.6. Inventory.  VENDOR shall, not later than * from the Effective
          ---------
Date, maintain an inventory of each Product equal to * of the amount it is
required to supply pursuant to Section 2.5 for month M+1 of the then current
Rolling Forecast. CORVIS will purchase such inventory at the then-current unit
prices upon termination of this Agreement or Product discontinuance, subject in
each case to the binding commitments of CORVIS set forth in Section 2.4.

     2.7. Product Report.  VENDOR will provide CORVIS with a periodic report of
          --------------
the manufacturing capacity utilization, inventory quantities and refreshment
rates and current lead times for each Product.

     2.8. Pricing.
          -------

     (1)  The unit prices for each Product shall be that set forth in Attachment
     1. The unit prices set forth in Attachment 1 shall remain in effect through
     2001, unless expressly agreed upon by CORVIS and VENDOR as provided in this
     Section.

     (2)  Pricing for Orders placed in 2002 and 2003 will be negotiated by the
     parties in good faith in the latter part of 2001 and 2002, respectively,
     and will be competitive. (For purposes of this Section 2.8(2), pricing will
     be deemed to be competitive if it is no more than * greater than the
     pricing offered to CORVIS by another producer of goods of substantially
     similar quality, design and function, in similar quantities and under
     substantially similar terms and conditions as provided herein; provided,
     that such producer's products have been qualified with CORVIS.) If, as a
     result of VENDOR's pricing not being competitive, the parties do not agree
     in good faith to 2002 or 2003 pricing, then: (x) CORVIS will have no
     obligations to issue Orders, and VENDOR will have no obligations to accept
     Orders, in that particular year; and, (y) CORVIS will promptly purchase the
     inventory mentioned in Section 2.6., above, at the unit prices last in
     effect.

                                      -4-

* Certain information on this page has been omitted and filed separately with
the Securities and Exchange Commission. Confidential treatment has been
requested with respect to the omitted portions.

<PAGE>

     (3)   VENDOR and CORVIS shall perform a quarterly review of each unit price
     to ensure CORVIS is receiving the lowest price of VENDOR for similar
     quantities and specifications of each Product and the parties shall
     negotiate in good faith to adjust the unit pricing going forward contained
     in Attachment 1 accordingly. For pricing that is variable based upon the
     units of a Product purchased by CORVIS, pricing shall be based upon
     quantities CORVIS has in its initial Rolling Forecast for the year, and, if
     the actual amount purchased by CORVIS is greater or less than the initial
     Rolling Forecast amount upon which the pricing was calculated, then, at
     these quarterly reviews, the parties will negotiate in good faith to adjust
     the unit pricing going forward for that Product accordingly. If there is a
     discrepancy between the unit price of any Product listed in Attachment 1
     and another correspondence, including purchase orders and order
     confirmations, the unit price set forth in Attachment 1 shall control,
     unless amended via an express writing executed by CORVIS and VENDOR

     2.9.  All prices are exclusive of any applicable sales, use or other
similar taxes, transportation charges and cost of insurance and other similar
charges which may be assessed against an order. Any such taxes or charges shall
be invoiced to and paid by CORVIS. In lieu of paying sales, use or other similar
taxes, CORVIS may provide VENDOR with a valid tax exemption certificate or other
document acceptable to the appropriate taxing authorities.

     2.10. Product Discontinuance.  VENDOR shall not discontinue any Product
           ----------------------
unless it gives CORVIS at least * notice in writing. In such event, VENDOR shall
provide CORVIS with a suggested product replacement at the same time for the
remainder of the term of this Agreement. CORVIS shall have the right to
substitute the Replacement Product for the Product under this Agreement, at a
price to be negotiated by the parties, but in no event more than the price paid
for the original Product. If CORVIS elects not to use the suggested replacement
product, VENDOR shall offer CORVIS a * period beginning the day of the notice of
discontinuance within which CORVIS can place orders for the discontinued
Product. CORVIS may give a last order ("One Time Buy Order") immediately prior
to the end of the * period. The One Time Buy Order is non-cancelable, non-
reschedulable and non-returnable, except as otherwise provided in this
Agreement. Products ordered with the One Time Buy Order will be delivered to
CORVIS as agreed to by the parties, but no later than * after the notice of
discontinuance.

                                      -5-

* Certain information on this page has been omitted and filed separately with
the Securities and Exchange Commission. Confidential treatment has been
requested with respect to the omitted portions.

<PAGE>

                  ARTICLE III - SPECIFICATIONS AND STANDARDS
                  ------------------------------------------

     3.1  Changes to Specifications.
          -------------------------

     (a)  Manufacturing Standards.  Ninety (90) days prior to any proposed
          -----------------------
     implementation of changes to the Manufacturing Standards for any Product
     that affect either the form, fit or function of a Product, VENDOR shall
     provide CORVIS with notice of any such proposed modifications for CORVIS'
     review and VENDOR shall include therewith an assessment of the impact of
     such modifications on the Product Quality Specifications and pricing of
     each Product.  CORVIS shall respond to any such proposed change within
     thirty (30) days of its proposed date of implementation.  To the extent
     that such proposed modifications are unacceptable to CORVIS, they shall not
     be implemented except as provided in Section 2.10.  CORVIS shall not
     unreasonably withhold acceptance of any such proposed change.  In the event
     CORVIS declines to accept any such change, CORVIS shall immediately inform
     VENDOR in writing together with the specific reasons for declining to
     accept the change.

     (b)  Product Quality Specifications. CORVIS may provide VENDOR with written
          ------------------------------
     notice of modifications to the Manufacturing Standards or the Product
     Quality Specifications of any individual Product.  VENDOR shall use
     commercially reasonable efforts to implement such modifications (subject to
     mutual agreement with CORVIS regarding terms, prices and time frames).
     CORVIS will pay to VENDOR the unit price for Products, and the fair market
     value of all unique material, deemed obsolete by any such changes, subject
     to the binding commitments of CORVIS set forth in Section 2.4.

     3.2  Record keeping.  VENDOR and CORVIS shall mutually agree upon the
          --------------
records to be maintained by VENDOR regarding processing activities, monitoring
of process steps, and Product quality tests.  Thereafter for a period of at
least two years, VENDOR shall accurately maintain such records.  CORVIS shall
have the right upon request to inspect such records, and to obtain a copy of
such records, provided that the information contained therein shall constitute
VENDOR's Confidential Information..

     3.3  Inspection.  Authorized representatives of CORVIS shall have the
          ----------
right, upon reasonable notice to VENDOR and with reasonable frequency, during
normal business hours, to enter VENDOR's facility and to inspect all areas used
for the storage and handling of ingredients, and in the processing,
manufacturing, and storage of the Products, to monitor and assure compliance
with the Manufacturing Standards and Product Quality Specifications.  CORVIS
shall also be permitted to review quality reports and statistical process
controls related to the manufacturing of Products.

                                      -6-

<PAGE>

            ARTICLE IV - ORDER, ACCEPTANCE, AND PAYMENT PROCEDURES
            ------------------------------------------------------

     4.1  CORVIS Orders.  CORVIS shall submit Purchase Orders to VENDOR in a
          -------------
timely manner for the quantities of each Product code it is required to purchase
pursuant to Section 2.4 .  VENDOR shall acknowledge receipt of the Purchase
Order within one (1) business day and further agrees to provide an Order
Confirmation confirming the shipment dates within three (3) business days after
receipt of a Purchase Order for orders it is obligated to accept pursuant to
Section 2.5.  Upon acceptance, a Purchase Order shall constitute a binding
obligation of the parties subject to the terms of this Agreement.  The terms of
this Purchase Agreement shall control over any inconsistent terms of any
Purchase Order or Order Confirmation issued after the date of this Agreement.
Nothing herein obligates VENDOR to accept any terms of a Purchase Order
delivered by CORVIS or obligates CORVIS to accept the terms of an Order
Confirmation delivered by VENDOR

     4.2  Delivery Times. VENDOR shall use commercially reasonable efforts to
          ---------------
deliver the Products within the delivery time frames specified in Purchase
Orders issued pursuant to Article 2 of this Purchase Agreement. VENDOR shall
deliver 100% of all products ordered under Article 2 within the Delivery Window
*. VENDOR agrees to participate in a vendor evaluation program with respect to
deliveries under this Agreement. VENDOR shall use commercially reasonable
efforts to comply with any reasonable request by CORVIS for acceleration of
delivery, subject to product inventory and lead time requirements. CORVIS shall
also have the right to delay delivery of ordered products once per Purchase
Order by a maximum of * by providing VENDOR not less than * written notice
before the target delivery date, provided, that, upon such notice, CORVIS can
delay the delivery of up to * one time by a maximum of *. Any Product for which
CORVIS has requested a delay shall be deemed timely delivered within the
Delivery Window. Should VENDOR fail (i) in any rolling consecutive * period to
deliver the required quantity of any Product and (ii) in any * to make all
scheduled deliveries within the Delivery Window, in each case in accordance with
the obligations contained in Article 2 at least * of the time then CORVIS will
have no further purchase obligations for that Product for *; provided, that such
purchase obligations will be eliminated only to the extent that CORVIS actually
orders substitute products from a third party to replace the Products that
Vendor so failed to timely deliver. For purposes of this section, VENDOR shall
not be able to cure any quantity shortfall in an earlier delivery by delivering
a greater quantity in any subsequent delivery.

     4.3  Cancellations.  CORVIS shall have the right to cancel any Purchase
          -------------
Order in whole or in part prior to shipment, subject to its binding purchase
commitments set forth in Section 2.4.  VENDOR must cease production and delivery
upon notification of cancellation.

     4.4  Point of Delivery.  The Products sold to CORVIS under this Agreement
          -----------------
shall be delivered by VENDOR , FOB origin to CORVIS at its designated facility
in Columbia, MD (the "Point of Delivery"), unless otherwise indicated on the
Purchase Order.

                                      -7-

* Certain information on this page has been omitted and filed separately with
the Securities and Exchange Commission. Confidential treatment has been
requested with respect to the omitted portions.
<PAGE>

     4.5  Packaging.  Products shall be packaged in accordance with industry
          ---------
standards and any applicable requirements of the carrier used to deliver such
Products.  Each shipment will be labeled with the appropriate Purchase Order
number and each Product shall be labeled with relevant part numbers per CORVIS'
Product Quality Specifications.

     4.6  Partial Deliveries.  Should VENDOR be unable to deliver Products
          ------------------
within a delivery schedule established by a given Purchase Order, it shall
deliver partial shipments only with CORVIS' consent

     4.7  Inspection, Acceptance and Rejection.
          ------------------------------------

     (a)  Inspection.  All Products shall be inspected by CORVIS following
     receipt at the Point of Delivery.

     (b)  Rejection and Acceptance. CORVIS shall have the right to reject any
          ------------------------
     Product that was not manufactured in compliance with the Manufacturing
     Standards or that does not comply with the Product Quality Specifications.
     CORVIS shall inform the VENDOR in writing within thirty (30) days after
     receipt at the Point of Delivery of its rejection of any Product together
     with the reason(s) for such rejection.  If CORVIS determines that a
     shipment of a given Product received from VENDOR does not conform, as
     required by a mutually-agreed Acceptable Quality Level under MIL-STD-105E,
     a copy of which is attached hereto as Attachment 3, to the Manufacturing
     Standards or the Product Quality Standards, CORVIS shall have the right to
     reject all, some or none of the shipment of such Product containing such
     defective unit or units.  VENDOR shall, at the request of CORVIS, as
     promptly as possible replace the Products thereof rejected by CORVIS.
     VENDOR shall use commercially reasonable efforts to issue material return
     authorizations in an expeditious manner.

     (c)  Disposition of Rejected Products.  If CORVIS rejects any Product in
          --------------------------------
     accordance with the provisions of Section 4.7 (b), CORVIS shall have the
     right to either:

        (1)  return the rejected Product to VENDOR for, at VENDOR's option,
        credit, refund, or replacement; or

        (2)  accept the material as a substandard grade product with an
        appropriate reduction in price.

     If CORVIS requests replacement of a rejected Product, VENDOR shall promptly
     ship the replacement Product.

     (d)  Responsibility for Rejected and Returned Products. If CORVIS rejects a
          -------------------------------------------------
     Product:

        (1)  VENDOR shall, upon notice from CORVIS, make all necessary
        arrangements for the transportation and return of the rejected Product;

        (2)  VENDOR shall be solely responsible for all costs of transportation
        and other actions necessary to return the rejected material;

                                      -8-

<PAGE>

        (3) Title to the rejected Product shall be deemed to have been always
        retained by the VENDOR, and never to have passed to CORVIS;

        (4) VENDOR shall retain all risks of loss, contamination, and liability
        with respect to shipment and disposition of such rejected Product; and

        (5) VENDOR shall be solely responsible for the proper handling,
        transportation, storage, treatment and disposal of the rejected
        material.

     (e)    Title; Risk of Loss.   Except as provided in Section (d)(3) above,
            -------------------
     title to Products shall pass to CORVIS upon shipment of such Products to
     CORVIS.  VENDOR assumes all risks of loss or contamination and liabilities
     arising from the storage, handling and shipment of products until such time
     as such Products are delivered to CORVIS at the Point of Delivery.

     4.8    Payment.  Payment for Products by CORVIS (including any sales, use
            -------
or other similar taxes, transportation charges and cost of insurance and other
similar charges to be paid by CORVIS) shall be made * following the
receipt of a valid invoice  (provided, however, that CORVIS shall not be
obligated to pay for any Products rejected in accordance with the provisions of
Section 4.7 (b)). *

                             ARTICLE V -- WARRANTY
                             ---------------------

     5.1    Product Warranty.  For a period of 24 months commencing upon CORVIS'
            ----------------
receipt of any given Product under this Agreement (the "Warranty Period"),
VENDOR warrants that all Products sold hereunder or pursuant hereto, will be
free of any claim of any nature by any third person and that VENDOR will convey
clear title thereto to CORVIS as provided hereunder.  VENDOR warrants that
during the Warranty Period each Product delivered pursuant to this Agreement was
manufactured in accordance with the Manufacturing Standards, conforms to the
Product Quality Specifications and is of good material and workmanship and is
free from defects in material and workmanship.  This warranty is subject to
proper maintenance and operation of the particular Product. Any attempt by
VENDOR to limit, disclaim, or restrict any such warranties or any remedies of
CORVIS, by acknowledgment or otherwise, in accepting or performing any Purchase
Order, shall be null, void, and ineffective without CORVIS' written consent.
The foregoing warranties are exclusive and in lieu of all other warranties,
express or implied.  WITHOUT LIMITING THE FOREGOING SENTENCE, THE IMPLIED
WARRANTIES OF MERCHANTABILITY AND OF FITNESS FOR PARTICULAR PURPOSE SHALL NOT
APPLY.

                                      -9-

* Certain information on this page has been omitted and filed separately with
the Securities and Exchange Commission. Confidential treatment has been
requested with respect to the omitted portions.
<PAGE>

     5.2  Warranty Remedy. If any Product is found to be in violation of the
          ---------------
warranty contained in Section 5.1, CORVIS may, in addition to any other rights
which it may have under warranties provided or required by law or contained in
this Agreement, at its option and at VENDOR's sole cost and expense, return any
nonconforming or defective Product to VENDOR for repair, refund or replacement
(at VENDOR's option).  Payment by CORVIS of any invoice shall not constitute
acceptance of the Products covered by such invoice, and acceptance by CORVIS
shall not relieve VENDOR of its warranty or other obligations under this
Agreement.

                      ARTICLE VI -- INTELLECTUAL PROPERTY
                      -----------------------------------

     6.1  Warranty and Infringement Indemnity.  VENDOR hereby warrants that the
          -----------------------------------
Products do not infringe any third party intellectual property and VENDOR is
entitled to make, have made, use, offer for sale, and sell the Products to
CORVIS.  VENDOR shall indemnify according to the provisions of this Agreement
and defend any action brought against CORVIS that is based on any claim that a
Product infringes any third party intellectual property; except when the
infringement claim is based on (i) a CORVIS supplied design, or (ii) a
combination of the Products with other devices or elements not supplied by
VENDOR and, absent such combination, there would be no sustainable claim of
infringement.  CORVIS shall promptly notify VENDOR in writing of any
infringement claim and VENDOR shall have the right to control the defense of all
such claims, lawsuits, or proceedings.  If an infringement claim is sustained,
or CORVIS' use of the Product is enjoined, VENDOR shall, if possible, either (i)
procure the right to continue to make, use, and sell the Product, or (ii)
replace or modify the Product to be non-infringing while still conforming to the
Product Quality Standards.

     6.2  Right to Use.  VENDOR hereby grants to CORVIS the right to use, offer
          ------------
for sale, and sell each Product for its intended purpose under all intellectual
property owned or licensed by VENDOR, either solely or jointly, as long as
CORVIS continues to purchase Products from VENDOR. Nothing in this Section 6.2
shall be deemed to expand, modify, contradict or supplement any other provision
of this Article VI.

     6.3  THE FOREGOING IS VENDOR'S SOLE LIABILITY WITH RESPECT TO ANY CLAIMS
RELATING TO INFRINGEMENT OF ANY THIRD-PARTY INTELLECTUAL PROPERTY RIGHTS. VENDOR
DISCLAIMS ALL OTHER WARRANTIES, EXPRESS AND IMPLIED, RELATING TO CLAIMS THAT THE
PRODUCTS INFRINGE ANY THIRD-PARTY INTELLECTUAL PROPERTY RIGHTS.  CORVIS SHALL
USE REASONABLE COMMERCIAL EFFORTS TO MITIGATE ANY DAMAGES UNDER THIS SECTION.

         ARTICLE VII - COMPLIANCE WITH LAWS AND OTHER RESPONSIBILITIES
         -------------------------------------------------------------

     7.1  VENDOR Responsibilities.  VENDOR shall be solely responsible for
          -----------------------
compliance with all Environmental Laws, export laws, and other laws, rules,
regulations, Governmental Approvals, and governmental requirements applicable to
the manufacturing, storage, transportation and delivery of the Products. Nothing
in this Agreement is intended or should be construed as indicating that CORVIS
has the ability to control the operation of VENDOR's facilities.

                                      -10-

<PAGE>

     7.2  Safety Information.  VENDOR shall acquire from the supplier of any raw
          ------------------
materials, and make available to CORVIS, all appropriate information, including
Material Safety Data Sheets, regarding the properties and characteristics of
such materials and procedures for their proper handling, management and
disposition.  VENDOR shall provide all such information to CORVIS as may be
applicable to the Products at time of delivery.

     7.3  Compliance With Export Controls. CORVIS acknowledges that the Products
          -------------------------------
and certain related technical information are subject to United States export
controls, pursuant to the Export Administration Regulations, 15 C.F.R. Parts
768-799. CORVIS shall comply with all requirements of the Export Administration
Regulations with respect to the Products and all such technical information.
Without limiting the generality of the foregoing, CORVIS agrees that, without
the prior written authorization of VENDOR and the United States Government,
CORVIS will not, and will not permit its representatives to,: (i) export,
reexport, divert or transfer the Products or any such technical information, or
any direct product thereof, to any destination, company, or person restricted or
prohibited by the United States export controls, or (ii) disclose any such
technical information to any national of any country when such disclosure is
restricted or prohibited by the United States export controls.

                   ARTICLE VIII -- CONFIDENTIAL INFORMATION
                   ----------------------------------------

     VENDOR and CORVIS acknowledge that each may receive proprietary and
confidential information of the other in connection with the execution and
performance of this Agreement.  Each party agrees not to use or disclose to
third parties any Confidential Information supplied to it by the other party as
provided in the Bi-lateral Nondisclosure Agreement executed by the parties on
Dec. 1, 1999 and Dec. 8, 1999, respectively (a copy of which is attached as
Attachment 3), that shall remain in full force and effect and control the
obligations of the parties with respect to Confidential Information exchanged
pursuant to this Agreement.To the extent that there are inconsistent provisions,
the terms of this Agreement shall control.

              ARTICLE IX-- REPRESENTATIONS, WARRANTIES, COVENANTS
              ---------------------------------------------------

     9.1  VENDOR Representations, Warranties, and Covenants.  VENDOR represents,
          -------------------------------------------------
warrants, and covenants to CORVIS that:

     (a)  VENDOR has disclosed to CORVIS any affiliation or association with a
     CORVIS Competitor, other than as a VENDOR.  No CORVIS Competitor holds a
     Controlling Interest in VENDOR or operates as an affiliate or within the
     same organization, or has any other relationship with VENDOR that would
     provide access to information pertaining to VENDOR's relationship with
     CORVIS.  VENDOR shall notify CORVIS as soon as legally permitted if (i) a
     CORVIS Competitor undertakes or consummates the acquisition of a
     Controlling Interest in VENDOR, (ii) any agreement is reached under which
     VENDOR may merge with or otherwise be acquired by a CORVIS Competitor, or
     (iii) a change occurs in VENDOR's relationship with any CORVIS Competitor
     that provides access to CORVIS' Confidential Information.  VENDOR shall not
     disclose or make available any CORVIS Confidential Information to any
     Corvis Competitor without CORVIS' prior written consent. VENDOR holds and
     will maintain all required Governmental Approvals necessary to operate
     VENDOR's facilities involved in

                                      -11-

<PAGE>

     performing VENDOR's obligations under this Agreement, including but not
     limited to, all Governmental Approvals required for (i) the storage, use,
     processing, manufacture, and shipment of the Products or materials used in
     the manufacture of the Products, and (ii) the storage, treatment, discharge
     or disposal of any Regulated Substances or wastes generated by VENDOR's
     processes or facilities.

     (b)   VENDOR shall comply with the requirements of all federal, state and
     local laws, rules, regulations, ordinances, permits, licenses and other
     requirements, including without limitation, all Environmental Laws,
     applicable to the conduct by VENDOR of its business and the performance by
     VENDOR of its obligations under this Agreement.

     9.2   Insurance.
           ---------

     (a)   VENDOR shall obtain and maintain the following insurance coverages
     for the duration of this Agreement:

       (1) Workers Compensation Insurance as statutorily required; and
     Employers' Liability Insurance of not less than $1 Million for each
     accident, $1 Million disease limit per employee, and $1 Million disease
     limit in the aggregate;

       (2) Commercial general liability insurance, including, but not limited
     to, product liability insurance, of not less than $1 Million per
     occurrence, and $2 Million in the aggregate; and

       (3) Umbrella insurance coverage with excess coverage limit of not less
     than $8 Million.

     (b)   VENDOR shall provide CORVIS with the appropriate Certificates of
     Insurance prior to the start of work under this Agreement.

     (c)   VENDOR shall notify CORVIS of any change in, or cancellation of, any
     policies listed in this Section.

                               ARTICLE X -- TERM
                               -----------------

     10.1  Term. Unless otherwise renewed pursuant to Section 10.2 or terminated
           ----
pursuant to Section 10.3, this Agreement shall commence on the date hereof, and
shall continue for a term ending on December 31, 2003 (the "Initial Term").

                                      -12-

<PAGE>

     10.2 Renewal. CORVIS and VENDOR may by mutual agreement renew this
          -------
Agreement for additional one (1) year terms (each a "Renewal Term") after the
expiration of the Initial Term, upon such terms and conditions as the parties
may agree.  If CORVIS desires to extend the term of this Agreement beyond the
end of the Initial Term or any then-current Renewal Term, CORVIS shall provide
VENDOR at least forty (40) days prior to the end of such term a written notice
of such renewal request together with any proposed changes to the terms and
conditions of this Agreement.  Within thirty (30) days after receipt of such
notice, VENDOR shall notify CORVIS whether it (i) accepts CORVIS' proposal for
such proposed Renewal Term, (ii) has a counteroffer for the terms and conditions
of the proposed Renewal Term, or (iii) is unwilling to renew this Agreement.

     10.3 Termination.
          -----------

     (a)  *

     (b)  Force Majeure.  If a Force Majeure Event (defined below) prevents
          -------------
     VENDOR from performing its obligations under this Agreement for a period in
     excess of 30 days, CORVIS shall have the right to terminate this Agreement
     upon written notice to VENDOR

     (c)  Termination for Default.  Either party may terminate this Agreement in
          -----------------------
     the event of a default by the other, as provided in Article 13.

                          ARTICLE XI -- FORCE MAJEURE
                          ---------------------------

     11.1 Force Majeure.  Except as provided in Section 11.4, neither party
          -------------
shall be liable for any failure or delay in performance of its obligations under
this Agreement due to any of the following conditions:  (a) an act of God,
hurricane, tornado, epidemic, earthquake, flood, fire, explosion, power outage
or similar occurrence; (b) an act of the public enemy, war, riot, civil
disturbance, or similar occurrence; (c) the order, injunction or judgment of any
court, administrative agency, or governmental body with jurisdiction over the
performance of a party's obligations under this Agreement (excepting decisions
interpreting federal, state or local taxes), provided that such injunction,
order or judgment is not the result of the negligent or willful action or
inaction of the party relying thereon (collectively, a "Force Majeure Event").

     11.2 Mitigation.  The party seeking relief from its obligations shall be
          ----------
obligated to take all reasonable steps to mitigate the adverse effect of any
such Force Majeure Event.

     11.3 Notice.  Each party affected by a Force Majeure Event shall provide
          ------
prompt notice to the other party of the nature of the Force Majeure Event, its
anticipated impact and duration, and the actions being taken to avoid or
minimize its effect.

                                      -13-

* Certain information on this page has been omitted and filed separately with
the Securities and Exchange Commission. Confidential treatment has been
requested with respect to the omitted portions.
<PAGE>

     11.4 Exceptions.
          ----------

     (a)  In no event shall a Force Majeure Event relieve a party from liability
     for its own negligence or willful actions or inaction.

     (b)  Neither party shall be excused by a Force Majeure Event from the
     obligation to pay money due under this Agreement.

                  ARTICLE XII- ASSIGNMENT AND SUBCONTRACTING
                  ------------------------------------------

     12.1 Assignment and Subcontracting by VENDOR.  VENDOR shall not assign,
          ---------------------------------------
subcontract, or delegate any of its obligations hereunder without the prior
written consent of CORVIS, which consent shall not be unreasonably withheld.

     12.2 Assignment by CORVIS.  CORVIS may not assign any of its rights or
          --------------------
obligations under this Agreement without the prior written consent of VENDOR,
which consent shall not be unreasonably withheld; provided, however, that CORVIS
may subcontract any part of its obligations, or assign this entire Agreement, to
any of CORVIS' majority-owned subsidiaries, by providing written notification to
VENDOR of such assignment or subcontract.

     12.3 Full Liability.  Notwithstanding any assignment or subcontract by
          --------------
CORVIS permitted by the terms of this Section, or any assignment by CORVIS or
VENDOR pursuant to the prior written consent of the other party, each of VENDOR
and CORVIS shall remain fully liable for full performance of all of their
respective obligations under this Agreement.

                            ARTICLE XIII -- DEFAULT
                            -----------------------

     13.1 Events of Default.  Any one or more of the following shall constitute
          -----------------
an Event of Default hereunder

     (a)  A party to this Agreement fails to perform or observe in any material
     respect any material term, covenant, condition or restriction of this
     Agreement, and such default shall continue for a period of * after notice
     in writing thereof is given (unless resulting from a prior failure or
     breach by the other party);

     (b)  The inaccuracy in any material respect of any representation or
     warranty made by a party herein or in a document or certificate delivered
     pursuant hereto; or

     (c)  A party to this Agreement ceases doing business in the normal course,
     becomes insolvent, fails generally to pay its debts as they become due,
     makes a general assignment for the benefit of creditors, suffers or permits
     the appointment of a receiver for its assets, invokes the provisions of
     bankruptcy, insolvency or similar laws or becomes subject to the provisions
     of bankruptcy, insolvency or similar laws and any proceedings thereunder
     are not dismissed or stayed within forty-five (45) days of commencement.

                                       -14-

* Certain information on this page has been omitted and filed separately with
the Securities and Exchange Commission. Confidential treatment has been
requested with respect to the omitted portions.
<PAGE>

     13.2 Remedies Upon Default. Upon the occurrence of an Event of Default as
          ---------------------
described in Section 13.1 above, the non-defaulting party shall have the right
to terminate this Agreement by giving written notice to the defaulting party of
its intention to terminate, provided that the specified default is then
continuing. Upon such a termination, (a) VENDOR shall make available to CORVIS
any material, tangible or intangible, of CORVIS then in possession of VENDOR,
(b) the parties shall pay to each other all amounts then due and owing, and (c)
each party shall promptly return to the other party its Confidential
Information. The foregoing remedies are not exclusive, but are in addition to
any other rights and remedies provided in this Agreement, by law or in equity.

     13.3 Limitation of Liability.  Except for liability under ARTICLE 6,
          -----------------------
neither party shall be liable for any special, indirect or consequential damages
arising in connection with this Agreement, including any loss of profits,
regardless of how caused, whether or not either party had been advised of the
possibility of such damages or the legal theory or form of course of action
under which such damages may be sought.

     13.4 Survival of Obligations.  Upon a termination of this Agreement,
          -----------------------
neither party shall be relieved of any obligation or liability accruing
hereunder prior to the date of termination.  In addition, the obligations of the
parties ARTICLES 6, 8 and 14 shall survive termination of this Agreement.

                         ARTICLE XIV - INDEMNIFICATION
                         -----------------------------

     14.1 Indemnification by VENDOR.  VENDOR hereby agrees to defend, indemnify
          -------------------------
and hold harmless the CORVIS Indemnified Parties from and against any and all
Claims and Losses arising from or related to: (a) injury to or death of any
person or loss of or damage to property caused by VENDOR or VENDOR's Responsible
Parties in connection with the performance or nonperformance of VENDOR's
obligations under this Agreement, (b) non-compliance by VENDOR with any
Environmental Law, (c) any existing Environmental Condition at VENDOR's property
or facilities, or (d) any Environmental Condition and any pollution or
contamination of the environment arising from the storage, treatment, handling,
disposal, or release of Regulated Substances at VENDOR's facility, or (e)
subject to Section 13.3, the sale by VENDOR to CORVIS of Products processed by
VENDOR pursuant to this Agreement which do not conform to the specifications set
forth in Attachment 2, except to the extent that such Claims or Losses are
caused by the negligent or willful action or inaction of CORVIS or CORVIS
Responsible Parties.

     14.2 Indemnification by CORVIS.  CORVIS hereby agrees to defend, indemnify
          -------------------------
and hold harmless VENDOR and the VENDOR Indemnified Parties from and against any
and all Claims and Losses, resulting from or arising out of: (a) injury to or
death of any person or loss of or damage to property caused by CORVIS or CORVIS
Responsible Parties, in connection with the performance or nonperformance of
CORVIS' obligations under this Agreement, (b) non-compliance by CORVIS with any
Environmental Law, (c) any existing Environmental Condition at CORVIS' property
or facilities, (d) any Environmental Condition, pollution or contamination of
the environment related to the release of Regulated Substances arising from the
shipment, handling, storage, or management of the Products while such Products
are under the ownership and control of CORVIS, or (e) the sale by CORVIS of the
Products, where such Products at the

                                      -15-

<PAGE>

time of delivery to CORVIS conformed to the specifications set forth in
Attachment 2, except to the extent that any of such VENDOR Losses are caused by
the negligent or willful actions or inaction of VENDOR, its agents, employees,
successors and assigns or others for whose actions VENDOR has legal
responsibility.

     14.3  Indemnification Limitations and Procedures.
           ------------------------------------------

     (a)   (The indemnification obligations of both VENDOR (pursuant to Section
     14.1) and CORVIS (pursuant to Section 14.2) are limited to the extent that
     the amount of any recovery by a VENDOR Indemnified Party or CORVIS
     Indemnified Party, as the case may be, shall be net of any foreign,
     federal, state and/or local income tax benefits inuring to the Indemnified
     Party as a result of the events that entitled the Indemnified Party to
     recover from the Indemnifying Party.

     (b)   If any claim, liability, demand, assessment, action, suit or
     proceeding shall be asserted against an Indemnified Party in respect of
     which such Indemnified Party proposes to demand indemnification or defense,
     the Indemnified Party shall promptly notify the Indemnifying Party thereof,
     provided that the failure to so notify the Indemnifying Party shall not
     reduce or affect the Indemnifying Party's obligations with respect thereto
     except to the extent that the Indemnifying Party is materially prejudiced
     thereby. Any written notice delivered pursuant to this Section shall set
     forth with specificity the basis of the claim for indemnification or
     defense and an estimate of the amount thereof.

     (c)   Subject to rights of or duties to any insurer or other third person
     having liability therefor, the Indemnifying Party may, within thirty (30)
     days following receipt of a notice of a claim under this Section, assume
     the defense of any such Claim or Loss.

     (d)   In the event the Indemnifying Party assumes the defense of such Claim
     or Loss:

       (1) The Indemnifying Party may engage, at its expense, counsel selected
     by the Indemnifying Party and approved by the Indemnified Party (which
     approval shall not be unreasonably withheld). The Indemnified Party may
     engage separate counsel at the Indemnified Party's sole expense.

       (2) The other party shall cooperate and make available to the
     Indemnifying Party and its representatives all employees, information,
     books, and records reasonably necessary or useful in connection with the
     defense.

       (3) The Indemnifying Party shall have the right to compromise or settle
     such Claim or Loss, provided that any such compromise or settlement must be
     approved by the Indemnified Party (which approval shall not be unreasonably
     withheld).

     (e)   If an Indemnifying Party does not elect to assume the defense of a
     Claim or Loss pursuant to this Article:

                                      -16-

<PAGE>

       (1)  The Indemnified Party shall alone have the right to conduct such
       defense, and to compromise or settle the Claim or Loss without prior
       consent of the Indemnifying Party.

       (2)  If it is ultimately determined by a court of competent jurisdiction
       that the Claim or Loss which forms the basis of such judgment or
       settlement is one that is validly an obligation of the Indemnifying Party
       who, after notice, elected not to assume the defense, the Indemnifying
       Party shall be bound by any such judgment or settlement as to the
       existence and amount of the claim, and the amount of such judgment or
       settlement shall be conclusively deemed to be a liability on account of
       which the other party is entitled to be indemnified pursuant to this
       Article.

                         ARTICLE XVI -- MISCELLANEOUS
                         ----------------------------

     16.1 Authority.  The parties hereby represent and warrant that they have
          ---------
full power and authority to enter into and perform this Agreement and the
parties know of no agreements, contracts, promises or undertakings which would
prevent the full execution and performance of this Agreement.

     16.2 Independent Contractor.  VENDOR's relationship to CORVIS shall be that
          ----------------------
of an independent contractor and nothing in this Agreement shall be construed to
constitute VENDOR or any of its employees or officers as an employee, agent,
joint venturer or partner of CORVIS.

     16.3 Reservation of Rights.  Either party's waiver of any of its remedies
          ---------------------
due to a breach by the other party shall be without prejudice and shall not
operate to waive any other remedies which it shall have available to it, nor
shall such waiver operate to waive its rights to any remedies due to a future
breach, whether of a like or different character.

     16.4 Headings and Construction.  The section headings contained in this
          -------------------------
Agreement are for reference purposes only and shall not affect in any way the
meaning or interpretation of this Agreement.  To the extent the context
requires, the singular shall include the plural and the plural shall include the
singular.  All dollar amounts listed herein shall be considered to be references
to U.S. dollars.

     16.5 Applicable Law.  This Agreement shall be governed by and construed in
          --------------
accordance with the laws of the State of Maryland without giving effect to the
choice of laws principles thereof.

     16.6 Severability.  In the event that any provision of this Agreement shall
          ------------
be found to be void or unenforceable, such finding shall not be construed to
render any other provision of this Agreement either void or unenforceable, and
all other provisions shall remain in full force and effect unless the provisions
which are invalid or unenforceable shall materially affect the rights or
obligations granted to or undertaken by either party hereunder.

                                      -17-

<PAGE>

     16.7  Notices.  Any notices required or permitted to be given under the
           -------
terms of this Agreement shall be in writing and sent to the following address by
(a) certified or registered United States Mail, return receipt requested,
postage prepaid (b) Federal Express or comparable overnight or next business day
courier service, or facsimile.  Notices shall be deemed given only upon receipt
at the following addresses:

     If to VENDOR:                           If to CORVIS:
     -------------                           -------------

     WaveSplitter Technologies, Inc.         CORVIS Telecommunications, Inc.
     46430 Fremont Blvd.                     7015 Albert Einstein Drive
     Fremont, CA 94538                       PO Box 9400
     Attn: Chief Financial Officer           Columbia, MD 21046-9400
                                             Attention: Director of Logistics

                                             With a copy to:  General Counsel

     16.8  Waiver.  Any failure of either party to comply with any of its
           ------
obligations or agreements herein contained may be waived only in writing by the
other party.

     16.9  Binding Effect; Benefits.  This Agreement shall inure to the benefit
           ------------------------
of and be binding upon the parties hereto and their respective successors and
assigns.  Nothing in this Agreement, express or implied, is intended to confer
on any person other than the parties hereto and their respective successors and
permitted assigns any rights, remedies, obligations or liabilities under or by
reason of this Agreement.

     16.10 Counterparts.  This Agreement may be executed simultaneously in two
           ------------
or more counterparts, each of which shall be deemed an original but all of which
together shall constitute one and the same instrument.

     16.11 Full Agreement.  This Agreement represents the complete and
           --------------
exclusive statement of the parties with respect to its subject matter.   All
prior understandings, agreements and discussions with respect hereto are merged
into and superseded by this Agreement.  No amendment, modification or waiver of
any provision of this Agreement and no understanding, course of dealing or usage
of trade purporting to modify this Agreement shall be effective unless it is in
writing signed by both parties and specifically states an intention to modify
and amend this Agreement.  No modification or amendment shall be effected by the
acknowledgment or acceptance of purchase orders, shipping instructions, or other
forms containing terms at variance with or in addition to those set forth
herein.

                                      -18-

<PAGE>

     IN WITNESS WHEREOF, the parties have caused this Agreement to be executed
by their duly authorized representatives as of the date first above written.

       WaveSplitter Technologies, Inc.                  CORVIS CORPORATION

Signature: /s/ William H. Diamond, Jr.    Signature: /s/ DAVID R. HUBER
          -----------------------------             ----------------------------

By:        William H. Diamond, Jr.        By:           David R. Huber
          -----------------------------              ---------------------------

Title:     President & CEO                Title:        President & CEO
          -----------------------------              ---------------------------

Date:           11/15/00                  Date:               11/15/00
          -----------------------------              ---------------------------

                                      -19-

<PAGE>

                                  APPENDIX 1
                                  DEFINITIONS
                                  -----------

     (a) "Claims" and "Losses" means any suits, claims, actions, damages,
losses, liabilities, obligations, expenses, damages, fines, penalties, or costs
and expenses, including costs of defense, settlement and reasonable attorney's
fees (including those incurred in connection with the defense or prosecution of
any indemnifiable claim or incurred in connection with the enforcement of an
indemnification provision).  Unless specifically stated in an indemnification
provision, Claims and Losses does not include any consequential, indirect,
incidental, or other similar damages (including without limitation lost profits)
incurred by any indemnified party, under any form or theory of action
whatsoever, whether in contract or otherwise).

     (b) "Confidential Information" means all business, personnel, and technical
information, designs, specifications, techniques, data and related know-how,
technical knowledge, trade secrets and experience, customer lists, sales and
market information, now or hereafter in the possession of VENDOR related to the
Products, and the products or business of CORVIS.  Confidential Information
includes any improvements to designs, specifications, techniques or processes
related to the Products, whether such improvements are developed by CORVIS or
the VENDOR.

     (c) "Controlling Interest" means owning twenty-five (25%) percent or more
of the voting stock of VENDOR.

     (d) "CORVIS Competitor" means Alcated Alsthom, Ciena Corporation, NEC
Corporation, Nortel Networks Corp, Cisco Systems, Inc or Lucent Technologies,
Inc. From time to time, CORVIS may, upon written consent of VENDOR, which shall
not be unreasonably withheld, add additional companies to the foregoing list
provided that any addition is engaged in the manufacturing or distribution of
products that are of substantially similar nature or use to the products
manufactured or sold by CORVIS.

     (e) "CORVIS Indemnified Parties" means CORVIS, its officers, directors,
employees, agents, successors and permitted assigns.

     (f) "CORVIS Responsible Parties" means CORVIS, and CORVIS' agents,
employees, successors and assigns, or others for whose actions CORVIS has legal
responsibility.

     (g) Effective Date" is the date of this Agreement as listed in the opening
paragraph of this Agreement.

     (h) "Environmental Condition" means the presence of a Regulated Substance
(other than a naturally occurring substance) on or at a property (including, but
not limited to, the presence in surface water, groundwater, soils or subsurface
strata).

     (i) "Environmental Law" means any federal, state, local or foreign statute,
law, rule, regulation, ordinance, code, or policy having the force of law
relating to protection of the environment or relating to the production,
generation, use, storage, treatment, processing, transportation or disposal of
Regulated Substances, including, without limitation:  the

                                      -20-

<PAGE>

Comprehensive Environmental Response, Compensation and Liability Act, 42 U.S.C.
(S) 9601 et seq. ("CERCLA"); the Superfund Amendments and Reauthorization Act,
         ------
Public Law 99-499, 100 Stat. 1613; Resource Conservation and Recovery Act
("RCRA"), 42 U.S.C. (S) 6901, et seq.; the National Environmental Policy Act, 42
                              -- ---
U.S.C. (S) 4321; the Safe Drinking Water Act, 42 U.S.C. (S) 300f et seq.; the
                                                                 -- ---
Toxic Substances Control Act ("TSCA"), 15 U.S.C. (S) 2601 et seq.; the Federal
                                                          -- ---
Insecticide, Fungicide and Rodenticide Act, 7 U.S.C. (S) 136, et seq.; the
                                                              -- ---
Hazardous Materials Transportation Act, 49 U.S.C. (S) 1801; the Federal Water
Pollution Control Act, 33 U.S.C. (S) 1251 et seq.; the Oil Pollution Act of
                                          -- ---
1990, 33 U.S.C. (S) 2701, et seq.; the Clean Air Act, 42 U.S.C. (S) 7401 et
                          -- ---                                         --
seq., and counterpart state and foreign statutes, and regulations adopted
---
thereunder.  "Environmental Law" does not include or encompass the tort,
contract, or any other law of any jurisdiction concerning or relating to Claims
and Losses for product liability, breach of warranty, trespass, nuisance,
personal injury or property damage.

     (j) "Governmental Approval" means any permit, license, authorization,
consent, approval, waiver, exception, variance, order, or exemption issued by
any federal, state or local governmental authority pursuant to an Environmental
Law.

     (k) "Indemnified Party" means a VENDOR Indemnified Party or a CORVIS
Indemnified Party who is owed an obligation to indemnify and defend against a
Claim or Loss pursuant to Section 14.

     (l) "Indemnifying Party" means the VENDOR or CORVIS, as the case may be,
who owes an obligation to indemnify and defend against a Claim or Loss pursuant
to Section 14.

     (m) "Manufacturing Standards" means the specifications for manufacturing
process steps and manufacturing conditions set forth in Attachment 2.

     (n)"Products" shall mean the products described in Attachment 1.

     (o) "Product Quality Specifications" means those specifications for a
Product established pursuant to Attachment 2 and shall include performance and
other specifications.

     (p) "Purchase Order" shall mean a purchase order delivered by CORVIS and
may include data in an equivalent form exchanged by Electronic Data Interchange.

     (q) "Regulated Substance" means any pollutant, contaminant, hazardous
substance, hazardous material, toxic substance, toxic pollutant, solid waste,
municipal waste, industrial waste, or hazardous waste, that is defined as such
and is subject to regulation under any applicable Environmental Law.

     (r) "VENDOR Indemnified Parties" means VENDOR, its officers, directors,
employees, agents, successors and permitted assigns.

     (s) "VENDOR Responsible Parties" means the VENDOR, and VENDOR's agents,
employees, successors and assigns, or others for whose actions VENDOR has legal
responsibility.

                                      -21-

<PAGE>

                        ATTACHMENT 1 - PRODUCT SUMMARY

     * Certain information on this page has been omitted and filed separately
     with the Securities and Exchange Commission. Confidential treatment has
     been requested with respect to the omitted portions.
<PAGE>

                                 ATTACHMENT 2
                                 ------------

                                SPECIFICATIONS
                                --------------

* Fused Tapered Coupler
Revision Level: B
Document Number: 91000096                                         [CORVIS LOGO]
Cognizant Engineer: *
--------------------------------------------------------------------------------

                           Procurement Specification

                            * Fused Tapered Coupler

                   This document and its contents are
                   proprietary to Corvis Corporation. NO
                   part of this document may be reproduced
                   in any form without written permission
                   from:

                               Corvis Corporation
                               P.O. Box 9400
                               7015 Albert Einstein Drive
                               Columbia, MD 21046-9400

--------------------------------------------------------------------------------
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                                                                     Page 1 of 7

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requested with respect to the omitted portions.
<PAGE>

* Fused Tapered Coupler
Revision Level: B
Document Number: 91000096                                          [CORVIS LOGO]
Cognizant Engineer: *
--------------------------------------------------------------------------------

                               Table of Contents

<TABLE>
<C> <S>                                                                      <C>
 1  History..................................................................  3
 2  Description..............................................................  3
 3  Abbreviations............................................................  3
 4  Related Documents........................................................  3
 5  Absolute Maximum Ratings.................................................  4
 6  Electrical Characteristics...............................................  4
 7  Optical Characteristics..................................................  4
 8  Mechanical Requirements..................................................  5
 9  Qualification and Reliability............................................  6
10  Data Requirements........................................................  6
11  Electronic Data Requirements.............................................  6
12  Product Changes..........................................................  7
13  Shipping Requirements....................................................  7
14  Barcode Requirements.....................................................  7

                                List of Figures

Figure 1 Layout..............................................................  5

                                 List of Tables

Table 1 Absolute Maximum Ratings.............................................  4
Table 2 Optical Characteristics..............................................  4
Table 3 Variant vs. Coupling Ratios and insertion loss flatness..............  5
Table 4 Dimensions (in millimeters)..........................................  5
Table 5 Fiber Color vs. Port.................................................  5
Table 6 Electronic Data Requirements.........................................  6
</TABLE>

--------------------------------------------------------------------------------
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requested with respect to the omitted portions.
<PAGE>

* Fused Tapered Coupler
Revision Level: B
Document Number: 91000096                                          [CORVIS LOGO]
Cognizant Engineer: *
--------------------------------------------------------------------------------

1    HISTORY

Change of color code of the Tap leg ( * ) 08/24/2000
Increase of Fiber pigtail length ( * ) 08/24/2000
* Relaxation 08/24/2000
* Relaxation 08/24/2000

2    DESCRIPTION

The fused fiber coupler is a * device that has * and * ports. * of the *
ports receives a fraction of the * power, while the other * port
receives the remainder of the * power. The device shall be *
* over the * from * nm.

3    ABBREVIATIONS

All abbreviations used in this document are:

<TABLE>
<CAPTION>
  Abbreviations                        Description
<S>                <C>
DFB                Distributed Feedback

DWDM               Dense Wavelength Division Multiplex

ER                 Extinction Ratio

Ith                Threshold current

IL                 Insertion Loss

ITU-T              International Telecommunications Union - Telecommunications

P-P                Peak-to-peak

PDL                Polarization Dependent Loss

PMD                Polarization Mode Dispersion

*                  *

*                  *

*                  *

S(ii)              Return loss from port i to port I

T(case)            Case temperature

T(op)              Operating temperature

T(store)           Storage temperature

TBD                To Be Determined
</TABLE>

4    RELATED DOCUMENTS

     ellcore GR-1209-CORE

     Bellcore GR-1221-CORE

     Bellcore GR-2882-CORE

     Corvis Corporation Barcode Technical Specification, Document 20000135

     Corvis Corporation Electronic Data Requirements, Document 20000413.

--------------------------------------------------------------------------------
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requested with respect to the omitted portions.
<PAGE>

* Fused Tapered Coupler
Revision Level: B
Document Number: 91000096                                          [CORVIS LOGO]
Cognizant Engineer: *
--------------------------------------------------------------------------------

5   ABSOLUTE MAXIMUM RATINGS

Absolute maximum ratings are intended to be conditions that a module can be
subjected to for short periods of time without permanent decrease in performance
or reliability. The exception is case storage temperature for which extended
periods of time must be acceptable.

                        Table 1 Absolute Maximum Ratings

<TABLE>
<CAPTION>
                             Parameter                                 Min       Max       Unit
-------------------------------------------------------------------------------------------------
<S>                                                                  <C>       <C>       <C>
*                                                                       *         *         *
-------------------------------------------------------------------------------------------------
*                                                                       *         *         *
-------------------------------------------------------------------------------------------------
*                                                                       *         *         *
-------------------------------------------------------------------------------------------------
*                                                                       *         *         *
-------------------------------------------------------------------------------------------------
</TABLE>

6    ELECTRICAL CHARACTERISTICS

This section is not applicable to this specification.

7    OPTICAL CHARACTERISTICS

Case operating temperature range is * C, unless otherwise stated.

                        Table 2 Optical Characteristics

<TABLE>
<CAPTION>
            Parameter                 Symbol       Min.       Typ.       Max.       Units             Comment
----------------------------------------------------------------------------------------------------------------------
<S>                                 <C>          <C>        <C>        <C>        <C>        <C>
*
----------------------------------------------------------------------------------------------------------------------
*
----------------------------------------------------------------------------------------------------------------------
*
----------------------------------------------------------------------------------------------------------------------
*
                                                 ---------------------------------------------------------------------

----------------------------------------------------------------------------------------------------------------------
*
----------------------------------------------------------------------------------------------------------------------
*
----------------------------------------------------------------------------------------------------------------------
*
----------------------------------------------------------------------------------------------------------------------
*
----------------------------------------------------------------------------------------------------------------------
*
----------------------------------------------------------------------------------------------------------------------
*
----------------------------------------------------------------------------------------------------------------------
*
----------------------------------------------------------------------------------------------------------------------
*
----------------------------------------------------------------------------------------------------------------------
</TABLE>

--------------------------------------------------------------------------------
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the Securities and Exchange Commission. Confidential treatment has been
requested with respect to the omitted portions.
<PAGE>

* Fused Tapered Coupler
Revision Level: B
Document Number: 91000096                                          [CORVIS LOGO]
Cognizant Engineer: *
--------------------------------------------------------------------------------

                    Table 3 Variant vs. Coupling Ratios *

<TABLE>
<CAPTION>
   Variant     Coupling Ratio   Coupling Ratio    Tap Insertion      Max Through             *             Max PDL from
                     (%)         Tolerance (%)      Loss (dB)      Insertion Loss                             * (dB)
                                                        *              (dB) *
--------------------------------------------------------------------------------------------------------------------------
<C>            <S>              <C>              <C>              <C>                <C>                <C>
     -010             *
--------------------------------------------------------------------------------------------------------------------------
     -011             *
 See note 1
--------------------------------------------------------------------------------------------------------------------------
     -020             *
--------------------------------------------------------------------------------------------------------------------------
     -030             *
--------------------------------------------------------------------------------------------------------------------------
     -040             *
--------------------------------------------------------------------------------------------------------------------------
     -050             *
--------------------------------------------------------------------------------------------------------------------------
     -060             *
--------------------------------------------------------------------------------------------------------------------------
</TABLE>

Note 1: variant 011 specifies a tap ratio of *, with a tolerance ratio of * , at
* nm and at room temperature.

8    MECHANICAL REQUIREMENTS

                                Figure 1 Layout

                                       *

                      Table 4 Dimensions (in millimeters)

<TABLE>
<CAPTION>
                        Feature                            Min.       Typ.        Max.
-----------------------------------------------------------------------------------------
<S>                                                        <C>        <C>         <C>
*                                                                                  *
-----------------------------------------------------------------------------------------
*                                                                                  *
-----------------------------------------------------------------------------------------
*                                                            *
-----------------------------------------------------------------------------------------
</TABLE>

                          Table 5 Fiber Color vs. Port

<TABLE>
<S>                                                     <C>                   <C>
                      *                                  *                     *
------------------------------------------------------------------------------------------
                      *                                  *                     *
------------------------------------------------------------------------------------------
</TABLE>

     Optical fiber characteristics: * micron diameter buffer, or equivalent

     Optical Connector type: Not required but may be supplied with connectors if
     the manufacturer ordinarily uses them for test or manufacturing purposes.

--------------------------------------------------------------------------------
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requested with respect to the omitted portions.
<PAGE>

* Fused Tapered Coupler
Revision Level: B
Document Number: 91000096                                          [CORVIS LOGO]
Cognizant Engineer: *
--------------------------------------------------------------------------------

     Labeling: The fiber pigtails shall not have any labels or stickers attached
     to it in any form.

     Fiber Coloring: The fiber pigtails shall be colored over the whole length
     of the pigtail.

9    QUALIFICATION AND RELIABILITY

The device shall be qualified to, and meet the reliability requirements of
Bellcore GR-1209-CORE & GR-1221-CORE. Devices shall be deemed to have failed if
any electrical or optical parameter does not meet the requirements of this
document.

10   DATA REQUIREMENTS

Each device shall be tested and a hard copy of the following data shall be
included with the component:

     1.   Insertion loss and coupling ratio for * channels at * nm at *
          C.

     2.   Corvis document revision level to which the part was manufactured.

11  ELECTRONIC DATA REQUIREMENTS

The electronic data requirements are described in the Corvis Electronic Data
Requirements, Document 20000413. The specific format associated with this
component shall be as follows:

                      Table 6 Electronic Data Requirements

<TABLE>
<CAPTION>
Column number   Header                   Description                 Unit       Data Format - Maximum length
----------------------------------------------------------------------------------------------------------------------
<C>            <S>         <C>                                      <C>        <C>
       1        CPN         Corvis Part number                       N/A        Alphanumeric 13 max
----------------------------------------------------------------------------------------------------------------------
       2        REV         Revision Level                           N/A        Alphanumeric 3 max
----------------------------------------------------------------------------------------------------------------------
       3        VCN         Vendor Code number                       N/A        Numeric 12 max
----------------------------------------------------------------------------------------------------------------------
       4        VPN         Vendor part number                       N/A        Alphanumeric 255 max
----------------------------------------------------------------------------------------------------------------------
       5        VSN         Serial number                            N/A        Alphanumeric 255 max
----------------------------------------------------------------------------------------------------------------------
       6        DATE        Date                                     N/A        MMDDYYYY
----------------------------------------------------------------------------------------------------------------------
       7         *           *                                       dB         Numeric *
----------------------------------------------------------------------------------------------------------------------
       8         *           *                                       dB         Numeric *
----------------------------------------------------------------------------------------------------------------------
       9         *           *                                       dB         Numeric *
----------------------------------------------------------------------------------------------------------------------
      10         *           *                                       dB         Numeric *
----------------------------------------------------------------------------------------------------------------------
      11         *           *                                       dB         Numeric *
----------------------------------------------------------------------------------------------------------------------
      12         *           *                                       dB         Numeric *
----------------------------------------------------------------------------------------------------------------------
      13         *           *                                       %          Numeric *
----------------------------------------------------------------------------------------------------------------------
      14         *           *                                       %          Numeric *
----------------------------------------------------------------------------------------------------------------------
      15         *                                                   %          Numeric *
----------------------------------------------------------------------------------------------------------------------
</TABLE>

--------------------------------------------------------------------------------
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<PAGE>

* Fused Tapered Coupler
Revision Level: B
Document Number: 91000096                                          [CORVIS LOGO]
Cognizant Engineer: *
--------------------------------------------------------------------------------

12   PRODUCT CHANGES

Not less than 6 months notice in writing to Corvis Corporation must be given in
the event of any changes to this product (form, fit or function) or
manufacturing process.

13   SHIPPING REQUIREMENTS

Each component shall bear a label with the following information as a minimum:

     1.   The manufacturer's identity,

     2.   Part number,

     3.   Serial number,

The devices shall be individually packaged in an antistatic container in a
manner that prevents damage during transit. The container and packing shall be
suitable for use in a class 10,000 clean room.

The container shall bear the following information as a minimum:

     1.   The manufacturer's identity,

     2.   The manufacturer's part number,

     3.   Corvis Corporation part number,

     4.   The manufacturer's serial number.

     5.   The revision level of the procurement specification document against
          which they were manufactured.

14   BARCODE REQUIREMENTS

Technical Specifications of the Barcodes are described in Corvis document
20000135.

Each individual component container shall have 3 bar codes:

     1.   Corvis Part number (human readable),

     2.   Revision level ( human readable)

     3.   Supplier Part number (human readable),

     4.   Serial number (human readable).

The external container containing shipped components must bear the following
barcodes:

     1.   Purchase order number (human readable),

     2.   Quantity (human readable only, No barcode) only if the external
          container is populated with one type of component.

--------------------------------------------------------------------------------
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requested with respect to the omitted portions.
<PAGE>

* Multiplexer
Revision Level: 0.2
Document Number: 91000303                                          [CORVIS LOGO]
Cognizant Engineer: *
--------------------------------------------------------------------------------

                           Procurement Specification

                                       *

                                 * Multiplexer

                   This document and its contents are
                   proprietary to Corvis Corporation. NO
                   part of this document may be reproduced
                   in any form without written permission
                   from:

                               Corvis Corporation
                               P.O. Box 9400
                               7015 Albert Einstein Drive
                               Columbia, MD 21046-9400

--------------------------------------------------------------------------------
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requested with respect to the omitted portions.
<PAGE>

* Multiplexer
Revision Level: 0.2
Document Number: 91000303                                          [CORVIS LOGO]
Cognizant Engineer: *
--------------------------------------------------------------------------------

                               Table of Contents

<TABLE>
<C> <S>                                                                      <C>
 1  History..................................................................  3
 2  Description..............................................................  3
 3  Abbreviations............................................................  3
 4  Related Documents........................................................  3
 5  Absolute Maximum Ratings.................................................  4
 6  Electrical Characteristics...............................................  4
 7  Optical Characteristics..................................................  4
 8  Mechanical Requirements..................................................  5
 9  Qualification and Reliability............................................  6
10  Data Requirements........................................................  6
11  Electronic Data Requirements.............................................  7
12  Shipping Requirements....................................................  8
13  Barcode Requirements.....................................................  8
14  Product Changes..........................................................  8
</TABLE>

                                List of Figures

Figure 1 Layout..............................................................  5

                                 List of Tables

<TABLE>
<S>                                                                          <C>
Table 1 Absolute Maximum Ratings.............................................  4
Table 2 Optical Characteristics..............................................  4
Table 3 Dimensions (in millimeters)..........................................  5
Table 4 Electronic Data Requirements.........................................  7
</TABLE>

--------------------------------------------------------------------------------
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<PAGE>

* Multiplexer
Revision Level: 0.2
Document Number: 91000303                                          [CORVIS LOGO]
Cognizant Engineer: *
--------------------------------------------------------------------------------

1    HISTORY

Document created.

2    DESCRIPTION

This document specifies the requirements for a * nm *. This * component combines
the optical power from * .

3    ABBREVIATIONS

All abbreviations used in this document are:

<TABLE>
<CAPTION>
  Abbreviations                   Description
<S>                <C>
IL(i)              Insertion Loss (where i = port number)

ILH(i)             Insertion Loss (wavelength)(i) *

ILL(i)             Insertion Loss (wavelength)(i) *

ISO(i)             Isolation (where i = port number)

P                  Power

PDL                Polarization Dependent Loss

(wavelength)(i)    Target Wavelength (where i = port number)

S(i)               Return loss (where i = port number)

T(case)            Case temperature

T(op)              Operating temperature

T(store)           Storage temperature
</TABLE>

4    RELATED DOCUMENTS

     Telcordia GR-1209-CORE

     Telcordia GR-1221-CORE

     Corvis Corporation Barcode Technical Specification, Document 20000135

     Corvis Corporation Electronic Data Requirements, Document 20000413.

--------------------------------------------------------------------------------
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<PAGE>

* Multiplexer
Revision Level: 0.2
Document Number: 91000303                                          [CORVIS LOGO]
Cognizant Engineer: *
--------------------------------------------------------------------------------

5    ABSOLUTE MAXIMUM RATINGS

Absolute maximum ratings are intended to be conditions that a module can be
subjected to for short periods of time without permanent decrease in performance
or reliability. The exception is case storage temperature for which extended
periods of time must be acceptable.

                        Table 1 Absolute Maximum Ratings

<TABLE>
<CAPTION>
                           Parameter                                Min       Max       Unit
----------------------------------------------------------------------------------------------
<S>                                                               <C>       <C>       <C>
Case storage temperature                                             *         *         *
----------------------------------------------------------------------------------------------
Case operating temperature                                           *         *         *
----------------------------------------------------------------------------------------------
Fiber bend radius                                                    *                   *
----------------------------------------------------------------------------------------------
Fiber tensile load                                                   *                   *
----------------------------------------------------------------------------------------------
</TABLE>

6    ELECTRICAL CHARACTERISTICS

This section is not applicable to this specification.

7    OPTICAL CHARACTERISTICS

Case operating temperature range is * , unless otherwise stated. Values of
wavelengths are referenced to vacuum wavelengths.

                        Table 2 Optical Characteristics

<TABLE>
<CAPTION>
           Parameter               Symbol      Min.           Typ.          Max.       Units              Comment
---------------------------------------------------------------------------------------------------------------------------
<S>                              <C>         <C>        <C>               <C>        <C>        <C>
*                                    *           *             *              *          *      *
---------------------------------------------------------------------------------------------------------------------------

---------------------------------------------------------------------------------------------------------------------------

---------------------------------------------------------------------------------------------------------------------------

---------------------------------------------------------------------------------------------------------------------------

----------------------------------------------------------------------------------------------

----------------------------------------------------------------------------------------------

---------------------------------------------------------------------------------------------------------------------------

---------------------------------------------------------------------------------------------------------------------------

---------------------------------------------------------------------------------------------------------------------------

---------------------------------------------------------------------------------------------------------------------------

---------------------------------------------------------------------------------------------------------------------------

---------------------------------------------------------------------------------------------------------------------------

---------------------------------------------------------------------------------------------------------------------------

---------------------------------------------------------------------------------------------------------------------------

---------------------------------------------------------------------------------------------------------------------------
</TABLE>

--------------------------------------------------------------------------------
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<PAGE>

* Multiplexer
Revision Level: 0.2
Document Number: 91000303                                          [CORVIS LOGO]
Cognizant Engineer: *
--------------------------------------------------------------------------------

8    MECHANICAL REQUIREMENTS

                                       *

                                Figure 1 Layout

                      Table 3 Dimensions (in millimeters)

<TABLE>
<CAPTION>
               Feature                    Min.       Typ.       Max.              Comment
---------------------------------------------------------------------------------------------------
<S>                                       <C>        <C>        <C>               <C>
Length L                                                         *
---------------------------------------------------------------------------------------------------
Diameter D                                                       *
---------------------------------------------------------------------------------------------------
Fiber Pigtails                              *
---------------------------------------------------------------------------------------------------
</TABLE>

--------------------------------------------------------------------------------
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<PAGE>

* Multiplexer
Revision Level: 0.2
Document Number: 91000303                                          [CORVIS LOGO]
Cognizant Engineer: *
--------------------------------------------------------------------------------

     Optical fiber characteristics: * micron diameter jacket, or equivalent

     Optical Connector type: Not required but may be supplied with connectors if
     the manufacturer ordinarily uses them for test or manufacturing purposes.

     Color coding: Color code fibers as shown in

     Couplers: should not be spliced together on delivery.

9    QUALIFICATION AND RELIABILITY

The passive elements of the modules shall be qualified to, and meet the
reliability requirements of Telcordia GR-1209-CORE & GR-1221-CORE. Modules shall
be deemed to have failed if any optical parameter does not meet the requirements
of this document.

10   DATA REQUIREMENTS

As a minimum, the following data is required with each module:

     1.   Insertion loss between each input port and the output port at *

     2.   Directivity of each input port with respect to the * ports

     3.   All data should be supplied in electronic format (e.g., Excel
          Spreadsheet).

--------------------------------------------------------------------------------
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<PAGE>

* Multiplexer
Revision Level: 0.2
Document Number: 91000303                                          [CORVIS LOGO]
Cognizant Engineer: *
--------------------------------------------------------------------------------

11   ELECTRONIC DATA REQUIREMENTS

The electronic data requirements are described in the Corvis Electronic Data
Requirements, Document 20000413. The specific format associated with this
component shall be as follows:

                      Table 4 Electronic Data Requirements

<TABLE>
<CAPTION>
Column number    Header                  Description                  Unit         Data Format - Maximum length
---------------------------------------------------------------------------------------------------------------------
<C>              <S>         <C>                                      <C>       <C>
      1          CPN         Corvis Part number                       N/A       Alphanumeric 13 max
---------------------------------------------------------------------------------------------------------------------
      2          Rev         Revision Level                           N/A       Alphanumeric 3 max
---------------------------------------------------------------------------------------------------------------------
      3          VCN         Vendor Code number                       N/A       Numeric 12 max
---------------------------------------------------------------------------------------------------------------------
      4          VPN         Vendor part number                       N/A       Alphanumeric 255 max
---------------------------------------------------------------------------------------------------------------------
      5          S/N         Serial number                            N/A       Alphanumeric 255 max
---------------------------------------------------------------------------------------------------------------------
      6          Date        Date                                     N/A       MMDDYYYY
---------------------------------------------------------------------------------------------------------------------
      7          S/NC1       *                                        N/A       Numeric 12 max
---------------------------------------------------------------------------------------------------------------------
      8          S/NC2       *                                        N/A       Numeric 12 max
---------------------------------------------------------------------------------------------------------------------
      9          S/NC3       *                                        N/A       Numeric 12 max
---------------------------------------------------------------------------------------------------------------------
     10          *           *                                        dB        Numeric 12 max
---------------------------------------------------------------------------------------------------------------------
     11          *           *                                        dB        Numeric 12 max
---------------------------------------------------------------------------------------------------------------------
     12          *           *                                        dB        Numeric 12 max
---------------------------------------------------------------------------------------------------------------------
     13          *           *                                        dB        Numeric 12 max
---------------------------------------------------------------------------------------------------------------------
     14          *           *                                        dB        Numeric 12 max
---------------------------------------------------------------------------------------------------------------------
     15          *           *                                        dB        Numeric 12 max
---------------------------------------------------------------------------------------------------------------------
     16          *           *                                        dB        Numeric 12 max
---------------------------------------------------------------------------------------------------------------------
     17          *           *                                        dB        Numeric 12 max
---------------------------------------------------------------------------------------------------------------------
     18          *           *                                        dB        Numeric 12 max
---------------------------------------------------------------------------------------------------------------------
     19          *           *                                        dB        Numeric 12 max
---------------------------------------------------------------------------------------------------------------------
     20          *           *                                        dB        Numeric 12 max
---------------------------------------------------------------------------------------------------------------------
     21          *           *                                        dB        Numeric 12 max
---------------------------------------------------------------------------------------------------------------------
     22          *           *                                        dB        Numeric 12 max
---------------------------------------------------------------------------------------------------------------------
     23          *           *                                        dB        Numeric 12 max
---------------------------------------------------------------------------------------------------------------------
     24          *           *                                        dB        Numeric 12 max
---------------------------------------------------------------------------------------------------------------------
     25          *           *                                        dB        Numeric 12 max
---------------------------------------------------------------------------------------------------------------------
</TABLE>

--------------------------------------------------------------------------------
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<PAGE>

* Multiplexer
Revision Level: 0.2
Document Number: 91000303                                          [CORVIS LOGO]
Cognizant Engineer: *
--------------------------------------------------------------------------------

12   SHIPPING REQUIREMENTS

Each component shall bear a label with the following information as a minimum:

     1.   The manufacturer's identity

     2.   The manufacturer's part number

     3.   The manufacturer's serial number

     4.   Identification of each optical port

The pump combiners shall be individually packaged in containers in a manner that
prevents damage during transit. The container and packing shall be of a static
dissipative material and be suitable for use in a class 10,000 cleanroom.

The container shall bear the following information as a minimum:

     1.   The manufacturer's identity

     2.   The manufacturer's part number

     3.   Corvis Corporation part number

     4.   The manufacturer's serial number

     5.   Wavelengths: *

13   BARCODE REQUIREMENTS

Technical Specifications of the Barcodes are described in Corvis document
20000315.

Each individual component container shall have 3 bar codes and the following
information clearly discernable to the unaided eye:

     1.   Corvis Part number,

     2.   Supplier Part number,

     3.   Serial number.

The external container containing shipped components must bear the following
barcodes and text, clearly discernable to the unaided eye:

     1.   Purchase order number,

     2.   Quantity (barcode not required), only if the external container is
          populated with one type of component.

14   PRODUCT CHANGES

Not less than 6 months notice in writing to Corvis Corporation must be given in
the event of any changes to this product (form, fit or function) or
manufacturing process.

--------------------------------------------------------------------------------
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<PAGE>

* Multiplexing Filter
Revision Level: B.1
Document Number: 91000094                                          [CORVIS LOGO]
Cognizant Engineer: *
--------------------------------------------------------------------------------

                           Procurement Specification

                             * Multiplexing Filter

                   This document and its contents are
                   proprietary to Corvis Corporation. NO
                   part of this document may be reproduced
                   in any form without written permission
                   from:

                               Corvis Corporation
                               P.O. Box 9400
                               7015 Albert Einstein Drive
                               Columbia, MD 21046-9400

--------------------------------------------------------------------------------
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All Rights Reserved
                                                                     Page 1 of 9

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requested with respect to the omitted portions.
<PAGE>

* Multiplexing Filter
Revision Level: B.1
Document Number: 91000094                                          [CORVIS LOGO]
Cognizant Engineer: *
--------------------------------------------------------------------------------

                               Table of Contents

<TABLE>
<C> <S>                                                                      <C>
 1  History..................................................................  4
 2  Description..............................................................  4
 3  Abbreviations............................................................  4
 4  Related Documents........................................................  4
 5  Absolute Maximum Ratings.................................................  4
 6  Electrical Characteristics...............................................  5
 7  Optical Characteristics..................................................  5
 8  Mechanical Requirements..................................................  6
 9  Qualification and Reliability............................................  7
10  Data Requirements........................................................  7
11  Electronic Data requirements.............................................  8
12  Product Changes..........................................................  8
13  Shipping Requirements....................................................  9
14  Barcode Requirements.....................................................  9

                                List of Figures

Figure 1 Filter Representation...............................................  6

                                 List of Tables

Table 1 Absolute maximum ratings.............................................  4
Table 2 Optical characteristics..............................................  5
Table 3 Dimensions...........................................................  6
Table 4 Package Requirements.................................................  7
Table 5 Data Requirements....................................................  8
</TABLE>

--------------------------------------------------------------------------------
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<PAGE>

* Multiplexing Filter
Revision Level: B.1
Document Number: 91000094                                          [CORVIS LOGO]
Cognizant Engineer: *
--------------------------------------------------------------------------------

                                    WARNING

                                    Class IV

                                Laser Radiation

          Avoid Eye or Skin Exposure to Direct or Scattered Radiation

                                    CAUTION

                        ESD Sensitive Electronic Devices

                          Observe All ESD Precautions

--------------------------------------------------------------------------------
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<PAGE>

* Multiplexing Filter
Revision Level: B.1
Document Number: 91000094                                          [CORVIS LOGO]
Cognizant Engineer: *
--------------------------------------------------------------------------------

1    HISTORY

Document creation date 09/01/99

2    DESCRIPTION

This document specifies the requirements for a * multiplexing filter. This
device is used in a DWDM fiber optic system to combine *. The device has * input
ports each containing *, and * output * that contains *.

3    ABBREVIATIONS

All abbreviations used in this document are:

<TABLE>
<CAPTION>
         Abbreviations                             Description
      <S>                               <C>
      DWDM                              Dense Wavelength Division Multiplex
</TABLE>

4    RELATED DOCUMENTS

     .  ANSI Z 136.1 - 1993.Safe use of Lasers

     .  Bellcore TR-NWT-000870 or equivalent.

     .  Bellcore GR - 1209 - CORE

     .  Bellcore GR - 1221 - CORE

     .  Bellcore GR - 2883 - CORE

     .  Corvis Document 20000135 - Barcode

     .  Corvis Document 20000413 - Electronic Data Technical Requirements

     .  ITU-T G.mcs grid

     .  Telcordia GR-468-CORE

5    ABSOLUTE MAXIMUM RATINGS

Absolute maximum ratings are intended to be conditions that a module can be
subjected to for short periods of time without permanent decrease in performance
or reliability. The exception is case storage temperature for which extended
periods of time must be acceptable.

                        Table 1 Absolute maximum ratings

<TABLE>
<CAPTION>
                             Parameter                                 Min       Max       Unit
-------------------------------------------------------------------------------------------------
<S>                                                                    <C>       <C>       <C>
Storage temperature                                                     *         *         *
-------------------------------------------------------------------------------------------------
Operating temperature                                                   *         *         *
-------------------------------------------------------------------------------------------------
Fiber bend radius                                                       *                   *
-------------------------------------------------------------------------------------------------
</TABLE>

--------------------------------------------------------------------------------
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                                                                     Page 4 of 9

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requested with respect to the omitted portions.
<PAGE>

* Multiplexing Filter
Revision Level: B.1
Document Number: 91000094                                          [CORVIS LOGO]
Cognizant Engineer: *
--------------------------------------------------------------------------------

6    ELECTRICAL CHARACTERISTICS

Not applicable

7    OPTICAL CHARACTERISTICS

The specification of Table 2 applies to the complete filter assembly, and not to
the individual components.

Case operating temperature range is * Unless otherwise stated.

                        Table 2 Optical characteristics

<TABLE>
<CAPTION>
          Parameter               Symbol       Min.        Type.       Max.       Units              Comment
-----------------------------------------------------------------------------------------------------------------------
<S>                             <C>          <C>        <C>          <C>        <C>        <C>
*
-----------------------------------------------------------------------------------------------------------------------
*
-----------------------------------------------------------------------------------------------------------------------
*
-----------------------------------------------------------------------------------------------------------------------
*
-----------------------------------------------------------------------------------------------------------------------
*
-----------------------------------------------------------------------------------------------------------------------
*
-----------------------------------------------------------------------------------------------------------------------
*
-----------------------------------------------------------------------------------------------------------------------
*
-----------------------------------------------------------------------------------------------------------------------
*
-----------------------------------------------------------------------------------------------------------------------
*
-----------------------------------------------------------------------------------------------------------------------
*
-----------------------------------------------------------------------------------------------------------------------
</TABLE>

--------------------------------------------------------------------------------
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                                                                     Page 5 of 9

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requested with respect to the omitted portions.
<PAGE>

* Multiplexing Filter
Revision Level: B.1
Document Number: 91000094                                          [CORVIS LOGO]
Cognizant Engineer: *
--------------------------------------------------------------------------------

8    MECHANICAL REQUIREMENTS

                                       *

                         Figure 1 Filter Representation

                               Table 3 Dimensions

<TABLE>
<CAPTION>
                    Feature                         Min.          Max.             Units
---------------------------------------------------------------------------------------------
<S>                                                 <C>           <C>              <C>
Diameter                                                            *               mm
---------------------------------------------------------------------------------------------
Length L Including Flexible Boots                                   *               mm
---------------------------------------------------------------------------------------------
Fiber pigtails                                        *                             mm
---------------------------------------------------------------------------------------------
</TABLE>

--------------------------------------------------------------------------------
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<PAGE>

* Multiplexing Filter
Revision Level: B.1
Document Number: 91000094                                          [CORVIS LOGO]
Cognizant Engineer: *
--------------------------------------------------------------------------------

                          Table 4 Package Requirements

     Optical fiber characteristics     * microns diameter jacket, or equivalent.
                                       Length = * mm.

     Color Coding                      Length * mm and starts at * mm from
                                       package

     Fiber Proof Test                  The filter shall be proof tested after
                                       recoating by application of a * Newton
                                       tensile stress.

     Optical Connector Type            Not required but may be supplied with
                                       connectors if the manufacturer ordinarily
                                       uses them for test or manufacturing
                                       purposes.

9    QUALIFICATION AND RELIABILITY

The device shall be qualified to and shall meet the reliability requirements of
Telcordia GR-468-CORE.  Modules shall be deemed to have failed if any electrical
or optical parameter does not meet the requirements of this document.

10   DATA REQUIREMENTS

Each filter shall be supplied with the following data

     1.   Measured value of (wavelength)c for each channel at T = *, and the
          filter bandwidth at * dB level.

     2.   Insertion loss; at (wavelength)c and T = *.

     3.   Spectral plots of the transmission between (wavelength)c * nm and
          (wavelength)c * nm.

--------------------------------------------------------------------------------
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requested with respect to the omitted portions.
<PAGE>

* Multiplexing Filter
Revision Level: B.1
Document Number: 91000094                                          [CORVIS LOGO]
Cognizant Engineer: *
--------------------------------------------------------------------------------

11   ELECTRONIC DATA REQUIREMENTS

The electronic data requirements are described in the Corvis Electronic Data
Requirements, Document 20000413. The specific format associated with this
component shall be as follows:

                           Table 5 Data Requirements

<TABLE>
<CAPTION>
        Column Number                               Description                             Unit
-----------------------------------------------------------------------------------------------------
<C>                             <S>                                                   <C>
              1                 Corvis Part Number                                          N/A
-----------------------------------------------------------------------------------------------------
              2                 Vendor Name                                                 N/A
-----------------------------------------------------------------------------------------------------
              3                 Vendor Part Number                                          N/A
-----------------------------------------------------------------------------------------------------
              4                 Serial Number                                               N/A
-----------------------------------------------------------------------------------------------------
              5                 Date                                                      MM/DD/YY
-----------------------------------------------------------------------------------------------------
              6                 *                                                            nm
-----------------------------------------------------------------------------------------------------
              7                 *                                                            nm
-----------------------------------------------------------------------------------------------------
              8                 *                                                            nm
-----------------------------------------------------------------------------------------------------
              9                 *                                                            nm
-----------------------------------------------------------------------------------------------------
             10                 *                                                            nm
-----------------------------------------------------------------------------------------------------
             11                 *                                                            nm
-----------------------------------------------------------------------------------------------------
             12                 *                                                            nm
-----------------------------------------------------------------------------------------------------
             13                 *                                                            nm
-----------------------------------------------------------------------------------------------------
             14                 *                                                            dB
-----------------------------------------------------------------------------------------------------
             15                 *                                                            dB
-----------------------------------------------------------------------------------------------------
             16                 *                                                            dB
-----------------------------------------------------------------------------------------------------
             17                 *                                                            dB
-----------------------------------------------------------------------------------------------------
             18                 *                                                            dB
-----------------------------------------------------------------------------------------------------
             19                 *                                                            dB
-----------------------------------------------------------------------------------------------------
             20                 *                                                            dB
-----------------------------------------------------------------------------------------------------
             21                 *                                                            dB
-----------------------------------------------------------------------------------------------------
</TABLE>

12   PRODUCT CHANGES

Not less than 6 months notice must be given in writing to Corvis Corporation in
the event that any changes occur to this product (form, fit or function) or
manufacturing process.

--------------------------------------------------------------------------------
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requested with respect to the omitted portions.
<PAGE>

* Multiplexing Filter
Revision Level: B.1
Document Number: 91000094                                          [CORVIS LOGO]
Cognizant Engineer: *
--------------------------------------------------------------------------------

13   SHIPPING REQUIREMENTS

Each device shall bear a label with the following information as a minimum:

     1.   The manufacturer's identity

     2.   Part number

     3.   Serial number

The devices shall be individually packaged in an antistatic container in a
manner that prevents damage during transit. The container and packing shall be
suitable for use in a class 10,000 clean room.

The container shall bear the following information as a minimum:

     1.   The manufacturers identity

     2.   The manufacturers part number

     3.   CORVIS Corporation. Part number

     4.   The manufacturers serial number

14   BARCODE REQUIREMENTS

Technical Specifications of the Barcodes are described in Corvis document
20000315.

Each device container shall have 3 bar codes and the following information
clearly discernable to the unaided eye:

     1.   Corvis Part number,

     2.   Supplier Part number,

     3.   Serial number.

The external container containing shipped components must bear the following
barcodes and text, clearly discernable to the unaided eye:

     1.   Purchase order number

     2.   Quantity (barcode not required), only if the external container is
          populated with one type of component

--------------------------------------------------------------------------------
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                                                                     Page 9 of 9

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requested with respect to the omitted portions.
<PAGE>

Fused Fiber * Coupler
Revision Level: B
Document Number: 91000110                                          [CORVIS LOGO]
Cognizant Engineer: *
--------------------------------------------------------------------------------

                           Procurement Specification

                             Fused Fiber * Coupler

                    This document and its contents are
                    proprietary to Corvis Corporation. NO
                    part of this document may be reproduced
                    in any form without written permission
                    from:

                                Corvis Corporation
                                P.O. Box 9400
                                7015 Albert Einstein Drive
                                Columbia, MD 21046-9400

--------------------------------------------------------------------------------
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                                                                     Page 1 of 8

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requested with respect to the omitted portions.
<PAGE>

Fused Fiber * Coupler
Revision Level: B
Document Number: 91000110                                          [CORVIS LOGO]
Cognizant Engineer: *
--------------------------------------------------------------------------------

                               Table of Contents

<TABLE>
<C> <S>                                                                      <C>
 1  History..................................................................  3
 2  Description..............................................................  3
 3  Abbreviations............................................................  3
 4  Related Documents........................................................  3
 5  Absolute Maximum Ratings.................................................  4
 6  Electrical Characteristics...............................................  4
 7  Optical Characteristics..................................................  5
 8  Mechanical Requirements..................................................  6
 9  Qualification and Reliability............................................  7
10  Data Requirements........................................................  7
11  Electronic Data Requirements.............................................  7
12  Shipping Requirements....................................................  8
13  Barcode Requirements.....................................................  8
14  Product Changes..........................................................  8

                                List of Figures

Figure 1 Layout..............................................................  6

                                 List of Tables

Table 1 Absolute Maximum Ratings.............................................  4
Table 2 Optical Characteristics..............................................  5
Table 3 Variant vs. Coupling Ratios..........................................  5
Table 4 Dimensions (in millimeters)..........................................  6
Table 5 Fiber Pigtail Color Scheme...........................................  6
Table 6 Electronic Data Requirements.........................................  7
</TABLE>

--------------------------------------------------------------------------------
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<PAGE>

Fused Fiber * Coupler
Revision Level: B
Document Number: 91000110                                          [CORVIS LOGO]
Cognizant Engineer: *
--------------------------------------------------------------------------------

1    HISTORY

Document created.

2    DESCRIPTION

The fused fiber coupler is a * device that has * and *. * of the output ports
receives a fraction of the input power, while the * output port receives the
remainder of the input power. The device shall be * over the wavelength range
from * nm. A * port is available such that the device may be used *.

3    ABBREVIATIONS

All abbreviations used in this document are:

<TABLE>
<CAPTION>
  Abbreviations                   Description
<S>                <C>
EL                 Excess Loss

FTC                Fused Tapered Coupler

IL(i)              Insertion Loss (where i = port number )

P(i)               Power (where i = port number)

PDL                Polarization Dependent Loss

(wavelength)       Wavelength Range

S(i)               Return loss (where i = port number)

T(case)            Case temperature

T(op)              Operating temperature

T(store)           Storage temperature
</TABLE>

4    RELATED DOCUMENTS

     Telcordia GR-1209-CORE

     Telcordia GR-1221-CORE

     Corvis Corporation Barcode Technical Specification, Document 20000135

     Corvis Corporation Electronic Data Requirements, Document 20000413.

--------------------------------------------------------------------------------
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<PAGE>

Fused Fiber * Coupler
Revision Level: B
Document Number: 91000110                                          [CORVIS LOGO]
Cognizant Engineer: *
--------------------------------------------------------------------------------

5    ABSOLUTE MAXIMUM RATINGS

Absolute maximum ratings are intended to be conditions that a module can be
subjected to for short periods of time without permanent decrease in performance
or reliability. The exception is case storage temperature for which extended
periods of time must be acceptable.

                        Table 1 Absolute Maximum Ratings

<TABLE>
<CAPTION>
                          Parameter                               Min       Max       Unit
--------------------------------------------------------------------------------------------
<S>                                                             <C>       <C>       <C>
Storage temperature                                                *         *         *
--------------------------------------------------------------------------------------------
Operating temperature                                              *         *         *
--------------------------------------------------------------------------------------------
Fiber bend radius                                                  *                   *
--------------------------------------------------------------------------------------------
Fiber tensile load                                                 *                   *
--------------------------------------------------------------------------------------------
</TABLE>

6    ELECTRICAL CHARACTERISTICS

This section is not applicable to this specification.

--------------------------------------------------------------------------------
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<PAGE>

Fused Fiber * Coupler
Revision Level: B
Document Number: 91000110                                          [CORVIS LOGO]
Cognizant Engineer: *
--------------------------------------------------------------------------------

7    OPTICAL CHARACTERISTICS

Operating temperature range is *, unless otherwise stated.

                        Table 2 Optical Characteristics

<TABLE>
<CAPTION>
           Parameter                Symbol      Min.      Typ.       Max.       Units                Comment
------------------------------------------------------------------------------------------------------------------------
<S>                               <C>         <C>       <C>        <C>        <C>        <C>
Wavelength range                      *
------------------------------------------------------------------------------------------------------------------------
Excess Loss                           *
------------------------------------------------------------------------------------------------------------------------
Coupling Ratio                        *
------------------------------------------------------------------------------------------------------------------------
Flatness                              *
------------------------------------------------------------------------------------------------------------------------

------------------------------------------------------------------------------------------------------------------------
Directivity                           *
------------------------------------------------------------------------------------------------------------------------
Polarization Dependent Loss           *
                                    ------------------------------------------------------------------------------------

------------------------------------------------------------------------------------------------------------------------
Return Loss                           *
------------------------------------------------------------------------------------------------------------------------
Thermal Stability                     *
------------------------------------------------------------------------------------------------------------------------
Power Rating                          *
------------------------------------------------------------------------------------------------------------------------
</TABLE>

                      Table 3 Variant vs. Coupling Ratios

<TABLE>
<CAPTION>
 Variant   Coupling Ratio (%)   Coupling Ratio Variance   PDL on the Tap port          * of the Tap port
                                          (%)                     (dB)                    (dB)
--------------------------------------------------------------------------------------------------------
<S>        <C>                 <C>                        <C>                   <C>
    *
--------------------------------------------------------------------------------------------------------
    *
--------------------------------------------------------------------------------------------------------
    *
--------------------------------------------------------------------------------------------------------
    *
--------------------------------------------------------------------------------------------------------
    *
--------------------------------------------------------------------------------------------------------
    *
--------------------------------------------------------------------------------------------------------
    *
--------------------------------------------------------------------------------------------------------
    *
--------------------------------------------------------------------------------------------------------
    *
--------------------------------------------------------------------------------------------------------
</TABLE>

--------------------------------------------------------------------------------
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<PAGE>

Fused Fiber * Coupler
Revision Level: B
Document Number: 91000110                                          [CORVIS LOGO]
Cognizant Engineer: *
--------------------------------------------------------------------------------

8    MECHANICAL REQUIREMENTS

                                       *

                                Figure 1 Layout

                      Table 4 Dimensions (in millimeters)

<TABLE>
<CAPTION>
                          Feature                              Min.        Max.
----------------------------------------------------------------------------------
<S>                                                            <C>         <C>
Length L                                                                    *
----------------------------------------------------------------------------------
Diameter (circle /)                                                         *
----------------------------------------------------------------------------------
Fiber pigtails                                                   *          *
----------------------------------------------------------------------------------
</TABLE>

                       Table 5 Fiber Pigtail Color Scheme

                                       *

     Optical Connector type: Not required but may be supplied with connectors if
     the manufacturer ordinarily uses them for test or manufacturing purposes.

     Optical fiber characteristics: * micron diameter, or equivalent

     Proof test: Each fiber pigtail shall be * Newton tensile load.

--------------------------------------------------------------------------------
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<PAGE>

Fused Fiber * Coupler
Revision Level: B
Document Number: 91000110                                          [CORVIS LOGO]
Cognizant Engineer: *
--------------------------------------------------------------------------------

9    QUALIFICATION AND RELIABILITY

The components shall be qualified to, and meet the reliability requirements of
Telcordia GR-1209-CORE & GR-1221-CORE. Components shall be deemed to have failed
if any optional parameter does not meet the requirements of this document.

10   DATA REQUIREMENTS

Each component shall be supplied with a hard copy of the following data:

     1.   Insertion loss and coupling ratio for both output channels at *.

11   ELECTRONIC DATA REQUIREMENTS

The electronic data requirements are described in the Corvis Electronic Data
Requirements, Document 20000413. The specific format associated with this
component shall be as follows:

                      Table 6 Electronic Data Requirements

<TABLE>
<CAPTION>
Column number    Header                 Description                Unit       Data Format - Maximum length
---------------------------------------------------------------------------------------------------------------------
<C>            <S>         <C>                                    <C>        <C>
      1          CPN         CORVIS Part Number                     N/A       Alphanumeric 13 max
---------------------------------------------------------------------------------------------------------------------
      2          REV         CORVIS Revision                        N/A       Alphanumeric 3 max
---------------------------------------------------------------------------------------------------------------------
      3          VND         Vendor Code, provided by CORVIS        N/A       Numeric 12 max
---------------------------------------------------------------------------------------------------------------------
      4          VPN         Vendor Part Number                     N/A       Alphanumeric 255 max
---------------------------------------------------------------------------------------------------------------------
      5          VSN         Vendor S/N                             N/A       Alphanumeric 255 max
---------------------------------------------------------------------------------------------------------------------
      6          DATE        Date of Test                           N/A       MMDDYYYY
---------------------------------------------------------------------------------------------------------------------
      7          IL13L       *                                      dB        Numeric 12 max
---------------------------------------------------------------------------------------------------------------------
      8          IL14L       *                                      dB        Numeric 12 max
---------------------------------------------------------------------------------------------------------------------
      9          IL13M       *                                      dB        Numeric 12 max
---------------------------------------------------------------------------------------------------------------------
     10          IL14M       *                                      dB        Numeric 12 max
---------------------------------------------------------------------------------------------------------------------
     11          IL13H       *                                      dB        Numeric 12 max
---------------------------------------------------------------------------------------------------------------------
     12          IL14H       *                                      dB        Numeric 12 max
---------------------------------------------------------------------------------------------------------------------
     13          CRL         *                                      dB        Numeric 12 max
---------------------------------------------------------------------------------------------------------------------
     14          CRM         *                                      dB        Numeric 12 max
---------------------------------------------------------------------------------------------------------------------
     15          CRH         *                                      dB        Numeric 12 max
---------------------------------------------------------------------------------------------------------------------
</TABLE>

--------------------------------------------------------------------------------
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<PAGE>

Fused Fiber * Coupler
Revision Level: B
Document Number: 91000110                                          [CORVIS LOGO]
Cognizant Engineer: *
--------------------------------------------------------------------------------

12   SHIPPING REQUIREMENTS

Each component shall bear a label with the following information as a minimum:

     1.   The manufacturers identity

     2.   Part number

     3.   Serial number

The components shall be individually packaged in a manner that prevents damage
during transit. The container and packing shall be of a static dissipative
material and be suitable for use in a class 10,000 cleanroom.

The container shall bear the following information as a minimum:

     1.   The manufacturer's identity

     2.   The manufacturer's part number

     3.   Corvis Corporation part number

     4.   The manufacturer's serial number

13   BARCODE REQUIREMENTS

Technical Specifications of the Barcodes are described in Corvis document
20000135.

Each individual component container shall have 3 bar codes and the following
information clearly discernable to the unaided eye:

     1.   Corvis Part number,

     2.   Supplier Part number,

     3.   Serial number.

The external container containing shipped components must bear the following
barcodes and text, clearly discernable to the unaided eye:

     1.   Purchase order number,

     2.   Quantity (barcode not required), only if the external container is
          populated with one type of component.

14   PRODUCT CHANGES

Not less than 6 months notice in writing to Corvis Corporation must be given in
the event of any changes to this product (form, fit or function) or
manufacturing process.

--------------------------------------------------------------------------------
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<PAGE>

* Fused Tapered Combiners
Revision Level: C                                                  [CORVIS LOGO]
Document Number: 91000083
Cognizant Engineer: *
--------------------------------------------------------------------------------

                           Procurement Specification

                                   * Fused

                               Tapered Combiners

                      This document and its contents are
                      proprietary to Corvis Corporation. NO
                      part of this document may be reproduced
                      in any form without written permission
                      from:

                                  Corvis Corporation
                                  P.O. Box 9400
                                  7015 Albert Einstein Drive
                                  Columbia, MD 21046-9400

--------------------------------------------------------------------------------
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<PAGE>

* Fused Tapered Combiners
Revision Level: C                                                  [CORVIS LOGO]
Document Number: 91000083
Cognizant Engineer: *
--------------------------------------------------------------------------------

                               Table of Contents

<TABLE>
<S>  <C>                                                                     <C>
  1   HISTORY...............................................................  4
  2   DESCRIPTION...........................................................  4
  3   ABBREVIATIONS.........................................................  4
  4   RELATED DOCUMENTS.....................................................  4
  5   ABSOLUTE MAXIMUM RATINGS..............................................  5
  6   ELECTRICAL CHARACTERISTICS............................................  5
  7   OPTICAL CHARACTERISTICS...............................................  5
  8   MECHANICAL REQUIREMENTS...............................................  6
  9   QUALIFICATION AND RELIABILITY.........................................  7
 10   DATA REQUIREMENTS.....................................................  7
 11   ELECTRONIC DATA REQUIREMENTS..........................................  8
 12   PRODUCT CHANGE........................................................  8
 13   SHIPPING REQUIREMENTS.................................................  9
 14   BARCODE REQUIREMENTS..................................................  9

</TABLE>

                                List of Figures

 Figure 1 Layout............................................................  6

                                 List of Tables

<TABLE>
 <S>     <C>                                                                 <C>
 Table 1  Absolute Maximum Ratings..........................................  5
 Table 2  Optical Characteristics...........................................  5
 Table 3  Wavelength and Channel Spacing Specifications.....................  6
 Table 4  Dimensions (in millimeters).......................................  6
 Table 5  Port Configuration................................................  6
 Table 6  Fiber Pigtail Color Scheme........................................  7
 Table 7  Electronic Data Requirements......................................  8

</TABLE>

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<PAGE>

* Fused Tapered Combiners
Revision Level: C                                                  [CORVIS LOGO]
Document Number: 91000083
Cognizant Engineer: *
--------------------------------------------------------------------------------

                                    WARNING
                                    Class IV
                                Laser Radiation
          Avoid Eye or Skin Exposure to Direct or Scattered Radiation

                                    CAUTION
                        ESD Sensitive Electronic Devices
                          Observe All ESD Precautions

--------------------------------------------------------------------------------
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<PAGE>

* Fused Tapered Combiners
Revision Level: C                                                  [CORVIS LOGO]
Document Number: 91000083
Cognizant Engineer: *
--------------------------------------------------------------------------------

1    HISTORY

Document created.

2    DESCRIPTION

This document specifies the requirements for the fused tapered couplers (FTC)
used for combining the output of * nm range *.

3    ABBREVIATIONS

All abbreviations used in this document are:

<TABLE>
<CAPTION>
    Abbreviations               Description

<S>                        <C>
 FTC                         Fused Tapered Coupler

 IL(i)                       Insertion Loss (where i = port number)

 ISO(i)                      Isolation (where i = port number)

 P                           Power

 PDL                         Polarization Dependent Loss

 (wavelength)(i)             Target Wavelength (where i = port number)

 S(i)                        Return loss (where i = port number)

 T(case)                     Case temperature

 T(op)                       Operating temperature

 T(store)                    Storage temperature
</TABLE>

4    RELATED DOCUMENTS

       Telcordia GR-1209-CORE

       Telcordia GR-1221-CORE

       Corvis Corporation Barcode Technical Specification, Document 20000135

       Corvis Corporation Electronic Data Requirements, Document 20000413.

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<PAGE>

* Fused Tapered Combiners
Revision Level: C                                                  [CORVIS LOGO]
Document Number: 9100083
Cognizant Engineer: *
--------------------------------------------------------------------------------

5    ABSOLUTE MAXIMUM RATINGS

Absolute maximum ratings are intended to be conditions that a module can be
subjected to for short periods of time without permanent decrease in performance
or reliability. The exception is case storage temperature for which extended
periods of time must be acceptable.

                        Table 1 Absolute Maximum Ratings

<TABLE>
<CAPTION>
----------------------------------------------------------
         Parameter        Min       Max       Unit
----------------------------------------------------------
<S>                      <C>       <C>       <C>
Storage temperature        *         *        (degrees)C
----------------------------------------------------------
Operating temperature      *         *        (degrees)C
----------------------------------------------------------
Fiber bend radius          *                    mm
----------------------------------------------------------
Fiber tensile load         *                    N
----------------------------------------------------------
</TABLE>

6    ELECTRICAL CHARACTERISTICS

This section is not applicable to this specification.

7    OPTICAL CHARACTERISTICS

Case operating temperature range is *, unless otherwise stated.

                        Table 2 Optical Characteristics

<TABLE>
<CAPTION>
------------------------------------------------------------------------------------------------------------------------
          Parameter          Symbol               Min.        Typ.             Max.       Units              Comment
------------------------------------------------------------------------------------------------------------------------
<S>                            <C>                <C>         <C>              <C>         <C>              <C>
Wavelength Range                (wavelength)(i)                See Table 3                  nm               *
------------------------------------------------------------------------------------------------------------------------
Insertion loss                  IL(1)                          See Table 3                  dB               *
------------------------------------------------------------------------------------------------------------------------
Insertion loss                  IL(2)                          See Table 3                  dB               *
------------------------------------------------------------------------------------------------------------------------
Channel Spacing                                                See Table 3                  nm
------------------------------------------------------------------------------------------------------------------------
Channel Passband                                   *                                        nm               *
------------------------------------------------------------------------------------------------------------------------
Flatness                                                       See Table 3                  dB               *
------------------------------------------------------------------------------------------------------------------------
Isolation                       ISO(1)             *                                        dB               *
------------------------------------------------------------------------------------------------------------------------
Isolation                       ISO(2)             *                                        dB               *
------------------------------------------------------------------------------------------------------------------------
Directivity                                        *                                        dB               *
------------------------------------------------------------------------------------------------------------------------
Polarization Dependent Loss     PDL                                             *           dB
------------------------------------------------------------------------------------------------------------------------
Return Loss                     S(i)               *                                        dB               *
------------------------------------------------------------------------------------------------------------------------
Thermal Wavelength Shift                           *                            *           pm/(degrees)C
------------------------------------------------------------------------------------------------------------------------
Power Rating                    P                  *                                        mW
------------------------------------------------------------------------------------------------------------------------
</TABLE>

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<PAGE>

* Fused Tapered Combiners
Revision Level: C                                                  [CORVIS LOGO]
Document Number: 91000083
Cognizant Engineer: *
--------------------------------------------------------------------------------

             Table 3 Wavelength and Channel Spacing Specifications

<TABLE>
<CAPTION>
------------------------------------------------------------------------------------------------------------------------------
 Variant   (wavelength)(1)        Max* from to                                  Max* from* to          Channel      Max. *
                nm                  (*  dB)       *             *                 (*  dB)             Spacing     over * nm
                                                                                                       (nm)         (dB)
------------------------------------------------------------------------------------------------------------------------------
<S>            <C>            <C>                <C>           <C>                 <C>               <C>
    *
------------------------------------------------------------------------------------------------------------------------------
    *
------------------------------------------------------------------------------------------------------------------------------
    *
------------------------------------------------------------------------------------------------------------------------------
    *
------------------------------------------------------------------------------------------------------------------------------
    *
------------------------------------------------------------------------------------------------------------------------------
    *
------------------------------------------------------------------------------------------------------------------------------
    *
------------------------------------------------------------------------------------------------------------------------------
    *
------------------------------------------------------------------------------------------------------------------------------
    *
------------------------------------------------------------------------------------------------------------------------------
    *
------------------------------------------------------------------------------------------------------------------------------
    *
------------------------------------------------------------------------------------------------------------------------------
    *
------------------------------------------------------------------------------------------------------------------------------
    *
------------------------------------------------------------------------------------------------------------------------------
</TABLE>

8    MECHANICAL REQUIREMENTS

                                Figure 1 Layout

                                       *

                      Table 4 Dimensions (in millimeters)

                -----------------------------------------------
                  Feature                Min.        Max.
                -----------------------------------------------
                  Length L                            *
                -----------------------------------------------
                  Diameter (circle/)                  *
                -----------------------------------------------
                  Fiber pigtails          *
                -----------------------------------------------

                          Table 5 Port Configuration

           ------------------------------------------------------------
            Port Number                       Function
           ------------------------------------------------------------
                 1                               *
           ------------------------------------------------------------
                 2                               *
           ------------------------------------------------------------
                 3                               *
           ------------------------------------------------------------
                 4                               *
           ------------------------------------------------------------

--------------------------------------------------------------------------------
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<PAGE>

* Fused Tapered Combiners
Revision Level: C                                                  [CORVIS LOGO]
Document Number: 91000083
Cognizant Engineer: *
--------------------------------------------------------------------------------

                      Table 6 Fiber Pigtail Color Scheme

<TABLE>
<CAPTION>
---------------------------------------------------------------------------------------------------------------------
    Variant              *               Port 1              *              Port 2       Port 3       Port 4

---------------------------------------------------------------------------------------------------------------------
   <S>                  <C>               <C>               <C>              <C>           <C>          <C>
    -010                 *                 Red               *                Blue          Brown        Clear
---------------------------------------------------------------------------------------------------------------------
    -020                 *                 Green             *                Black         Red          Clear
---------------------------------------------------------------------------------------------------------------------
    -030                 *                 Red               *                Blue          Brown        Clear
---------------------------------------------------------------------------------------------------------------------
    -040                 *                 Green             *                Black         Red          Clear
---------------------------------------------------------------------------------------------------------------------
    -050                 *                 Black             *                Green         Red          Clear
---------------------------------------------------------------------------------------------------------------------
    -060                 *                 Black             *                 Red          Black        Clear
---------------------------------------------------------------------------------------------------------------------
    -070                 *                 Brown             *                 Red          Blue         Clear
---------------------------------------------------------------------------------------------------------------------
    -080                 *                 Red               *                 Blue         Brown        Clear
---------------------------------------------------------------------------------------------------------------------
    -090                 *                 Green             *                 Black        Red          Clear
---------------------------------------------------------------------------------------------------------------------
    -100                 *                 Red               *                 Blue         Brown        Clear
---------------------------------------------------------------------------------------------------------------------
    -110                 *                 Red               *                 Blue         Brown        Clear
---------------------------------------------------------------------------------------------------------------------
    -120                 *                 Red               *                 Blue         Brown        Clear
---------------------------------------------------------------------------------------------------------------------
    -130                 *                 Red               *                 Blue         Brown        Clear
---------------------------------------------------------------------------------------------------------------------
</TABLE>

     Optical Connector type: Not required but may be supplied with connectors if
     the manufacturer ordinarily uses them for test or manufacturing purposes.

     Optical fiber characteristics: * micron diameter jacket, or equivalent

9    QUALIFICATION AND RELIABILITY

The components shall be qualified to, and meet the reliability requirements of
Telcordia GR-1209-CORE & GR-1221-CORE. Components shall be deemed to have failed
if any optical parameter does not meet the requirements of this document.

10   DATA REQUIREMENTS

Each component shall be supplied with the following data:

     1.   Insertion Loss: at *

     2.   Isolation on port 1; on port 2

     3.   * over channel pass band on port 1 and 2

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<PAGE>

* Fused Tapered Combiners
Revision Level: C                                                  [CORVIS LOGO]
Document Number: 91000083
Cognizant Engineer: *
--------------------------------------------------------------------------------

11   Electronic Data Requirements

The electronic data requirements are described in the Corvis Electronic Data
Requirements, Document 20000413. The specific format associated with this
component shall be as follows:

                     Table 7 Electronic Data Requirements

<TABLE>
<CAPTION>
---------------------------------------------------------------------------------------------------------------------
    Column       Header        Description                                   Unit        Data Format - Maximum length
    number
---------------------------------------------------------------------------------------------------------------------
     <S>          <C>         <C>                                             <C>          <C>
      1            CPN         CORVIS Part Number                              N/A          Alphanumeric 13 max
---------------------------------------------------------------------------------------------------------------------
      2            REV         CORVIS Revision                                 N/A          Alphanumeric 3 max
---------------------------------------------------------------------------------------------------------------------
      3            VND         Vendor Code, provided by CORVIS                 N/A          Numeric 12 max
---------------------------------------------------------------------------------------------------------------------
      4            VPN         Vendor Part Number                              N/A          Alphanumeric 255 max
---------------------------------------------------------------------------------------------------------------------
      5            VSN         Vendor S/N                                      N/A          Alphanumeric 255 max
---------------------------------------------------------------------------------------------------------------------
      6            DATE        Date of Test                                    N/A          MMDDYYYY
---------------------------------------------------------------------------------------------------------------------
      7                        *                                               dB           Numeric 12 max
---------------------------------------------------------------------------------------------------------------------
      8                        *                                               dB           Numeric 12 max
---------------------------------------------------------------------------------------------------------------------
      9                        *                                               dB           Numeric 12 max
---------------------------------------------------------------------------------------------------------------------
     10                        *                                               dB           Numeric 12 max
---------------------------------------------------------------------------------------------------------------------
     11                        *                                               dB           Numeric 12 max
---------------------------------------------------------------------------------------------------------------------
     12                        *                                               dB           Numeric 12 max
---------------------------------------------------------------------------------------------------------------------
     13                        *                                               dB           Numeric 12 max
---------------------------------------------------------------------------------------------------------------------
</TABLE>

12   PRODUCT CHANGE

Not less than 6 months notice in writing to CORVIS Corporation must be given in
the event of any changes to this product (form, fit or function) or
manufacturing process.

--------------------------------------------------------------------------------
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<PAGE>

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Revision Level: C                                                  [CORVIS LOGO]
Document Number: 91000083
Cognizant Engineer: *
--------------------------------------------------------------------------------

13   SHIPPING REQUIREMENTS

Each device shall bear a label with the following information as a minimum:

     1.   The manufacturer's identity

     2.   Part number

     3.   Serial number

The devices shall be individually packaged in an anti-static container in a
manner that prevents damage during transit. The container and packing shall be
suitable for use in a class 10,000 clean room.

The container shall bear the following information as a minimum:

     1.   The manufacturer's identity

     2.   The manufacturer's part number

     3.   Corvis Corporation part number

     4.   The manufacturer's serial number

     5.   (wavelength)(1) and (wavelength)(2)

14   BARCODE REQUIREMENTS

Technical Specifications of the Barcodes are described in Corvis document
20000135. Each individual component container shall have 3 bar codes and the
following information clearly discernable to the unaided eye:

     1.   Corvis Part number,

     2.   Supplier Part number,

     3.   Serial number.

The external container containing shipped components must bear the following
barcodes and text, clearly discernable to the unaided eye:

     1.   Purchase order number,

     2.   Quantity (barcode not required), only if the external container is
          populated with one type of component.

--------------------------------------------------------------------------------
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<PAGE>

                                  Attachment 3
<PAGE>

                      BI-LATERAL NON-DISCLOSURE AGREEMENT
                      -----------------------------------

     This Agreement made and entered into on 30 November 1999 by and between
CORVIS Corporation, formerly known as NOVA Telecommunications, Inc. ("CORVIS"),
having an office at 7015 Albert Einstein Drive, Columbia, Maryland 21046-9400
and WaveSplitter Technologies, Inc. having an office at 46430 Fremont Boulevard.
Fremont, California 94538 (the "Company"). Company and CORVIS arc collectively
referred to herein as the "Parties" and are, as specified below, sometimes
individually referred to herein as the "Party", the "Discloser" or the
"Recipient."

1.   Recitals
     --------

     The Parties desire to disclose to each other information relating to their
respective products and capabilities in the field of optics and electronics, in
furtherance of a mutual business interest.

2.   Definition
     ----------

     "Confidential Information" shall mean any and all proprietary and
confidential information disclosed by a Party (the "Discloser") to the other
Party receiving such information (the "Recipient"), including, without
limitation, information pertaining to system concepts, electronic
configurations, component specifications, logic diagrams, equipment designs,
system designs, system architecture, protocols, software, processes, financial
matters, business and personnel matters, research programs and the like.

3.   Protection of Confidential Information
     --------------------------------------

     In consideration of Discloser disclosing from time to time at its own
discretion certain of its Confidential Information to Recipient or its
officers, employees or agents, Recipient agrees that it will not disclose at any
time, nor permit its officers, employees or agents to disclose at any time
(either during their respective employment by Recipient or thereafter), nor
appropriate or use on its own behalf or on the behalf of others, any
Confidential Information, without in each instance first obtaining Discloser's
written consent thereto. The relationship created under this Agreement is
confidential and is to be treated as Confidential Information according to the
terms of this Agreement. Except as necessary to fulfill the purposes of this
Agreement, Recipient further agrees not to make, or permit to be made by its

                      BI-LATERAL NON-DISCLOSURE AGREEMENT
                      -----------------------------------

                                       2
<PAGE>

officers, employees or agents, copies, abstracts or summaries of any
Confidential Information, including, but not limited to, pictures, drawings,
specifications, plans, data, notes and reports embodying any Confidential
Information. Recipient further agrees to return to Discloser or certify
destruction thereof, upon Discloser's request, all such documents or other
embodiments of any Confidential Information.

4.   Extent of Application
     ---------------------

     The obligations under this Agreement shall not apply to Confidential
Information which (a) is available to the public by publication in a single
source; (b) is rightfully received by the Recipient from a third party without
restriction on disclosure and without breach of this Agreement; (c) is
independently developed by the Recipient provided that any person developing
same has not had access to the Confidential Information; (d) is approved for
release by written authorization of Discloser; (e) is disclosed pursuant to a
requirement of a governmental agency or by judicial requirement.

5.   No Grant of License
     -------------------

     This Agreement Shall not be construed as granting or conferring, either
expressly or by implication, any rights, licenses or relationships by the
furnishing of Confidential Information specified above or pursuant to this
Agreement. Without in any way limiting the foregoing, it is specifically
understood and agreed that Recipient shall in no way obtain any copyright in
any computer program furnished hereunder by the Discloser nor in any
translation, modification, correction or addition thereto.

6.   Remedies
     --------

     Each Party agrees to indemnify and hold the other harmless from any
damages, loss, cost. or liability (including legal fees and the cost of
enforcing this indemnity) arising out of or resulting from any unauthorized use
or disclosure by a Party or its Representatives of the Confidential Information
or other violation of this Agreement. In addition, because an award of money
damages (whether pursuant to the foregoing sentence or otherwise) would be
inadequate for any breach of this Agreement and any such breach would cause a
Party irreparable harm, each Party also agrees that, in the event of any breach
or threatened breach of this Agreement,

                      BI-LATERAL NON-DISCLOSURE AGREEMENT
                      -----------------------------------

                                       3
<PAGE>

the non-breaching Party will also be entitled, without the requirement of
posting a bond or other security, to equitable relief, including injunctive
relief and specific performance. Such remedies will not be the exclusive
remedies for any breach of this Agreement but will be in addition to all other
remedies available at law or equity to the aggrieved Party.

7.   Export Control
     --------------

     Each Party acknowledges that any information provided under this Agreement
by the other Party is subject to U.S. export laws and regulations, and any use
or transfer of such information must be authorized under those regulations. Each
Party agrees that it will not use, distribute, transfer, or transmit the
information of the other Party in any products except in compliance with U.S.
export regulations. If requested, each Party also agrees to sign written
assurances and other export-related documents as may be required for the other
Parties to comply with U.S. export regulations. This obligation survives any
termination of this Agreement.

8.   Miscellaneous
     -------------

     (a)    Modification. The agreements set forth in this Agreement may be
            ------------
modified or waived only by a separate writing signed by both Parties expressly
modifying or waiving such agreements.

     (b)    Waiver. The rights and remedies of the Parties hereunder are
            ------
cumulative and not alternative. Neither the failure nor any delay by any Party
in exercising any right, power, or privilege under this Agreement will operate
as a waiver of such right, power, or privilege, and no single or partial
exercise of any such right, power, or privilege will preclude any other further
exercise of such right, power, or privilege or the exercise of any other right,
power, or privilege.

     (c)    Person. The term "person" means any individual, corporation
            ------
(including any non-profit corporation), general or limited partnership, limited
liability company, joint venture, estate, trust, association, organization,
labor union,, or other entity or governmental body.

     (d)    Severability. The invalidity or unenforceability of any provision of
            ------------
this Agreement shall not affect the validity or enforceability of any other
provisions of

                      BI-LATERAL NON-DISCLOSURE AGREEMENT
                      -----------------------------------

                                       4
<PAGE>

this Agreement, which shall remain in full force and effect. If any of the
covenants or provisions of this Agreement are determined to be unenforceable by
reason of its extent, duration, scope or otherwise, the Parties contemplate that
the court making such determination shall reduce such extent, duration, scope or
other provision and enforce them in their reduced form for all purposes
contemplated by this Agreement.

     (e)    Costs. The Recipient agrees that if it is held by any court of
            -----
competent jurisdiction to be in violation, breach, or nonperformance of any of
the terms of this Agreement, then it will pay all costs of such action or suit,
including reasonable attorneys' fees.

     (f)    Jurisdiction: Service of Process. Any action or proceeding seeking
            --------------------------------
to enforce any provision of, or based on any right arising out of, this
Agreement may be brought against either of the Parties in the courts of the
State of Maryland, or, if it has or can acquire jurisdiction, in the United
States District Court for the Northern Division of Maryland, and each of the
Parties consents to the jurisdiction of such courts (and of the appropriate
appellate courts) in any such action or proceeding and waives any objection to
venue laid therein. Process in any action or proceeding referred to in the
preceding sentence may be served on any Party anywhere in the world.

     (g)    Governing Law. This Agreement will be governed by the laws of the
            -------------
State of Maryland without regard to conflicts of law principles.

     (h)    Counterparts. This Agreement may be executed in one or more
            ------------
counterparts, each of which will be deemed to be an original copy of this
Agreement, and all of which, when taken together, shall be deemed to constitute
one and the same Agreement.

     (i)    Termination. This Agreement can be terminated by either Party by
            -----------
providing written notice to the other Party, the notice being delivered in
person, by national courier or delivery service, or by first-class registered or
certified mail, with the expenses of delivery prepaid. The termination of the
Agreement will not become effective until thirty (30) days after the delivery of
the written notice to the other Party and upon the return, or certified
destruction, of all Confidential Information. This Agreement shall terminate
three years from the effective date. The obligation to

                      BI-LATERAL NON-DISCLOSURE AGREEMENT
                      -----------------------------------

                                       5
<PAGE>

protect Confidential Information shall survive the termination of this Agreement
for a period of three years.

     (j)    Authority to sign Agreement. Each Party, and each signer
            ---------------------------
individually, represents and warrants that the respective person signing on
behalf of the party has the authority and is duly authorized to do so.

IN WITNESS WHEREOF, the parties have duly executed this Agreement effective as
of the date first written above.

    WaveSplitter Technologies, Inc.                CORVIS Corporation

Signature:    /s/ Bruce Pollock           Signature:  /s/ Kim D. Larsen
              -----------------                       -----------------
By:           Bruce Pollock               By:         Kim D. Larsen
              -----------------                       -----------------
Title:        VP and CFO                  Title:      General Counsel
              -----------------                       -----------------
Date:         Dec. 1, 1999                Date:       Dec. 8, 1999
              -----------------                       -----------------

                                       6

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