Document:

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                                                                     Exhibit 4.2

                        WAVESPLITTER TECHNOLOGIES, INC.

              FORM OF FIFTH AMENDED AND RESTATED RIGHTS AGREEMENT
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                               TABLE OF CONTENTS

<TABLE>
<CAPTION>                                                               PAGE
                                                                      -------
<S>                                                                    <C>
Section 1.  Termination of Prior Rights                                    2
Section 2.  Registration Rights.........................................   2
       2.1  Definitions.................................................   2
       2.2  Requested Registration of Registrable Securities............   3
       2.3  Requested Registration of Series F Registrable Securities...   5
       2.4  Company Registration........................................   6
       2.5  Obligations of the Company..................................   6
       2.6  Furnish Information.........................................   8
       2.7  Expenses of Demand Registration.............................   8
       2.8  Expenses of Company Registration............................   8
       2.9  Underwriting Requirements...................................   9
      2.10  Delay of Registration.......................................   9
      2.11  Indemnification.............................................   9
      2.12  Reports Under Securities Exchange Act of 1934...............  11
      2.13  Form S-3 Registration.......................................  12
      2.14  Assignment of Registration Rights...........................  13
      2.15  Limitations on Subsequent Registration Rights...............  13
      2.16  Market Stand-Off Agreement..................................  14
      2.17  Termination of Registration Rights..........................  14
Section 3.  Additional Rights...........................................  15
       3.1  Right of First Offer........................................  15
       3.2  Delivery of Financial Statements............................  17
       3.3  Termination of Information Rights...........................  18
       3.4  Observer Rights.............................................  18
Section 4.  Miscellaneous...............................................  21
       4.1  Assignment..................................................  21
       4.2  Third Parties...............................................  21
       4.3  Governing Law...............................................  21
       4.4  Counterparts................................................  21
       4.5  Notices.....................................................  21
       4.6  Severability................................................  22
       4.7  Amendment and Waiver........................................  22
       4.8  Effect of Amendment or Waiver...............................  22
       4.9  Rights of Holders...........................................  22
      4.10  Delays or Omissions.........................................  22
      4.11  Attorney's Fees.............................................  22
      4.12  Aggregation of Stock........................................  23
</TABLE>

  Intel Corporation.....................................................  iii
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                  FIFTH AMENDED AND RESTATED RIGHTS AGREEMENT

     THIS FIFTH AMENDED AND RESTATED RIGHTS AGREEMENT (the "Agreement") is made
and entered into as of the 21/st/ day of September, 2000, by and among
WaveSplitter Technologies, Inc., a California corporation (the "Company"),
certain investors in the Company's Series A Preferred Stock (the "Series A
Investors"), pursuant to the Stock Purchase Agreements, dated as of December 20,
1996, certain investors in the Company's Series B Preferred Stock (the "Series B
Investors") pursuant to the Series B Preferred Stock Purchase Agreements dated
as of April 16, 1997 and October 20, 1997, the investors in the Company's Series
C Preferred Stock (the "Series C Investors") pursuant to the Series C Preferred
Stock Purchase Agreement dated as of June 29, 1998, the Investors in the
Company's Series D Preferred Stock (the "Series D Investors") pursuant to the
Series D Preferred Stock Purchase Agreement dated as of July 13, 1999, as
amended, the holders of warrants to purchase Series D Preferred Stock (the "D
Warrants") of the Company (the "D Warrant Holders"), the investor in the
Company's Series E Preferred Stock (the "Series E Investor" and collectively
with the Series A Investors, the Series B Investors, the Series C Investors, the
Series D Investors, the D Warrant Holders and the Series E Investor, the "Prior
Investors") pursuant to the Series E Preferred Stock Purchase Agreement dated as
of March 23, 2000 (the "Series E Agreement"), the investors in the Company's
Series F Preferred Stock (the "Series F Investors") pursuant to the Series F
Preferred Stock Purchase Agreement of even date herewith (the "Series F
Agreement") and the holders of warrants to purchase Series F Preferred Stock
(the "F Warrant") of the Company (the "F Warrant Holders"). The Series A
Investors, the Series B Investors, the Series C Investors, the Series D
Investors, the D Warrant Holders, the Series E Investor, the Series F Investors
and the F Warrant Holders are referred to collectively as the "Investors" and
are listed on the Schedule of Investors attached to this Agreement as Exhibit A.
                                                                      ---------
                                   RECITALS

     WHEREAS, the Company and the Prior Investors are parties to that certain
Fourth Amended and Restated Rights Agreement dated March 23, 2000, as amended
(the "Prior Rights Agreement"); and

     WHEREAS, the Prior Investors have certain registration and other rights
under the Prior Rights Agreement; and

     WHEREAS, GBC Venture Capital, Inc. (the "B Warrant Holder", and
collectively with the D Warrant Holders and the F Warrant Holder, the "Warrant
Holders"), is the holder of a warrant (the "B Warrant") to purchase up to 80,000
shares of the Series B Preferred Stock of the Company (the "Warrant Shares"), is
entitled to the Company registration rights specified in Section 2.4 (but not
the rights specified in Sections 2.2 and 2.13) of the Prior Rights Agreement, as
such provisions may be amended from time to time; and

     WHEREAS, the Company, to induce the Series F Investors to purchase up to an
aggregate of 6,900,000 shares of the Company's Series F Preferred Stock pursuant
to the Series F Agreement, desires to grant certain registration rights and
other rights to the Series F Investors, and the Prior Investors desire to
facilitate such grant; and

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     WHEREAS, the sale of the Series F Preferred Stock to the Series F Investors
is conditioned upon the registration rights and other rights being extended to
the Series F Investors;

     WHEREAS, the parties desire to make the Series F Warrant Holders a party to
this Agreement; and

     WHEREAS, the Prior Rights Agreement may be amended, diminished or
eliminated as set forth in Section 4.7 and 4.8 thereof.

     NOW, THEREFORE, in consideration of the mutual promises and covenants
hereinafter set forth, the parties agree as follows:

     Section 1.  Termination of Prior Rights. The Company and the Prior
                 ---------------------------
Investors, to induce the Series F Investors to invest in the Company, accept and
agree to the termination of all prior rights under the Prior Rights Agreement,
and accept and agree to be bound by the terms of this Agreement, and accept and
agree that the Prior Rights Agreement is hereby amended and restated in its
entirety by this Agreement.  Without limiting the foregoing, by execution and
delivery of this Agreement, the Prior Investors that become signatories hereto
waive, on behalf of all Prior Investors, any and all rights of first offer
(including rights of notice, if any) that may otherwise have arisen under
Section 3.1 of the Prior Rights Agreement with respect to the sales of shares of
Series F Preferred Stock of the Company contemplated by the Series F Agreement
and the F Warrant.

     Section 2.  Registration Rights.
                 -------------------

             2.1 Definitions. As used in this Agreement:
                 -----------

                 (a)     The terms "register," "registered," and "registration"
refer to a registration effected by preparing and filing a registration
statement in compliance with the Securities Act of 1933, as amended (the "Act")
and the subsequent declaration or ordering of the effectiveness of such
registration statement.

                 (b)     The term "Registrable Securities" means:

                         (i)  the shares of Common Stock issuable or issued upon
conversion of the Series A Preferred Stock, Series B Preferred Stock (including
the Warrant Shares for purposes of Section 2.4 hereof, but excluding the Warrant
Shares for purposes of Sections 2.2 and 2.13 hereof), Series C Preferred Stock,
Series D Preferred Stock (including the Series D Preferred Stock issuable upon
the exercise of the D Warrants), Series E Preferred Stock and Series F Preferred
Stock of the Company (including the Series F Preferred Stock issuable upon the
exercise of the F Warrant) (collectively, the "Preferred Stock"), and

                         (ii) any other shares of Common Stock of the Company
issued as (or issuable upon the conversion or exercise of any warrant, right or
other security which is issued as) a dividend or other distribution with respect
to, or in exchange for or in replacement of, the Preferred Stock excluding in
all cases, however, any Registrable Securities sold by a person in a
transaction in which his or her rights under this Agreement are not assigned;
provided, however, that
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                                       2
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Common Stock or other securities shall only be treated as Registrable Securities
if and so long as they have not been (A) sold to or through a broker or dealer
or underwriter in a public distribution or a public securities transaction, or
(B) sold in a transaction exempt from the registration and prospectus delivery
requirements of the Securities Act under Section 4(1) thereof so that all
transfer restrictions, and restrictive legends with respect thereto, if any, are
removed upon the consummation of such sale.

          (c)  The number of shares of "Registrable Securities then outstanding"
shall be determined by the number of shares of Common Stock outstanding which
are, and the number of shares of Common Stock issuable pursuant to then
exercisable or convertible securities which are, Registrable Securities.

          (d)  The term "Holder" means any Investor or Warrant Holder holding
Registrable Securities or securities convertible into Registrable Securities, or
any assignee thereof in accordance with Section 2.14 hereof.

          (e)  The term "Series F Holder" means any Investor or Warrant Holder
holding Series F Registrable Securities or securities convertible into Series F
Registrable Securities, or any assignee thereof in accordance with Section 2.14
hereof.

          (f)  The term "Initiating Holders" means any Holder or Holders who in
the aggregate hold no less than thirty percent (30%) of the outstanding
Registrable Securities.

          (g)  The term "Initiating Series F Holders" means Thomas Weisel
Capital Partners LLC and its affiliates.

          (h)  The term "Major Investor" means each Investor holding not less
than 400,000 shares of the outstanding Registrable Securities (as adjusted for
any stock splits, stock dividends, recapitalizations and the like), provided
that for the purposes of these calculations, any shares of Registrable
Securities held by an affiliate or partner of such Holder shall be aggregated.

          (i)  The term "Form S-3" means such form under the Act as in effect on
the date hereof or any registration form under the Act subsequently adopted by
the Securities and Exchange Commission ("SEC") which permits inclusion or
incorporation of substantial information by reference to other documents filed
by the Company with the SEC.

     2.2  Requested Registration of Registrable Securities.
          ------------------------------------------------

          (a)  If the Company shall receive at any time after six (6) months
after the effective date of the first registration statement for a public
offering of securities of the Company (other than a registration statement
relating either to the sale of securities to employees of the Company pursuant
to a stock option, stock purchase or similar plan or a SEC Rule 145
transaction), a written request from the Initiating Holders that the Company
file a registration statement under the Act covering the registration of not
less than thirty percent (30%) of the then outstanding Registrable Securities,
(or any lesser number of shares if the anticipated aggregate offering price, net
of underwriting discounts and commissions, would exceed $7,500,000) then the
Company shall, within

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ten (10) days of the receipt thereof, give written notice of such request to all
Holders and shall, subject to the limitations of subsection 2.2(b), use its best
efforts to effect as soon as practicable, and in any event within ninety (90)
days of the receipt of such request, the registration under the Act of all
Registrable Securities which the Holders request to be registered in a written
request given within twenty (20) days of the mailing of such notice by the
Company in accordance with Section 4.5.

               (b)  If the Initiating Holders intend to distribute the
Registrable Securities covered by their request by means of an underwriting,
they shall so advise the Company as a part of their request made pursuant to
this Section 2.2 and the Company shall include such information in the written
notice referred to in subsection 2.2(a). In such event, the right of any Holder
to include his Registrable Securities in such registration shall be conditioned
upon such Holder's participation in such underwriting and the inclusion of such
Holder's Registrable Securities in the underwriting (unless otherwise mutually
agreed by a majority in interest of the Initiating Holders and such Holder) to
the extent provided herein. All Holders proposing to distribute their securities
through such underwriting shall (together with the Company as provided in
subsection 2.5(e)) enter into an underwriting agreement in customary form with
the underwriter or underwriters selected for such underwriting by a majority in
interest of the Initiating Holders. Notwithstanding any other provision of this
Section 2.2, if the underwriter advises the Initiating Holders in writing that
marketing factors require a limitation of the number of shares to be
underwritten, then the Initiating Holders shall so advise all holders of
Registrable Securities which would otherwise be underwritten pursuant hereto,
and the number of shares of Registrable Securities that may be included in the
underwriting shall be allocated among all holders thereof, including the
Initiating Holders, in proportion (as nearly as practicable) to the amount of
Registrable Securities of the Company owned by each Holder; provided, however,
that the number of shares of Registrable Securities to be included in such
underwriting shall not be reduced unless all other securities proposed to be
sold by persons other than the Holders are first entirely excluded from the
underwriting. In the event that the underwriter advises the Series F Initiating
Holders that marketing factors require a limitation of the number of shares to
be underwritten, the Series F Initiating Holders may, at their option, withdraw
their request for registration pursuant to this section.

               (c)  The Company is obligated to effect only one (1) such
registration pursuant to this Section 2.2.

               (d)  Notwithstanding the foregoing, if the Company shall furnish
to Holders requesting a registration statement pursuant to this Section 2.2, a
certificate signed by the President of the Company stating that in the good
faith judgment of the Board of Directors of the Company, it would be seriously
detrimental to the Company and its shareholders for such registration statement
to be filed and it is therefore essential to defer the filing of such
registration statement, the Company shall have the right to defer such filing
for a period of not more than ninety (90) days after receipt of the request of
the Initiating Holders; provided, however, that the Company may not utilize this
right more than once in any twelve (12) month period.

               (e)  Notwithstanding the foregoing, the Company shall not be
obligated to effect, or to take any action to effect, any such registration
pursuant to this Section 2.2 during the period starting with the date sixty (60)
days prior to the Company's good faith estimate of the date of filing of, and
ending on a date ninety (90) days after the effective date of, a Company-
initiated

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registration; provided the Company is actively employing in good faith
all reasonable efforts to cause such registration statement to become effective.

          2.3  Requested Registration of Series F Registrable Securities.
               ---------------------------------------------------------

               (a)  If the Company shall receive at any time after the earlier
of (i) September 30, 2001 or (ii) six (6) months after the effective date of the
first registration statement for a public offering of securities of the Company
(other than a registration statement relating either to the sale of securities
to employees of the Company pursuant to a stock option, stock purchase or
similar plan approved by the Board of Directors of the Company or a SEC Rule 145
transaction approved by the Board of Directors of the Company), a written
request from the Initiating Series F Holders that the Company file a
registration under the Act covering the registration of not less than twenty
percent (20%) of the then outstanding Series F Registrable Securities, (or any
lesser number of shares if the anticipated aggregate offering price, net of
underwriting discounts and commissions, would exceed $7,500,000) then the
Company shall, within ten (10) days of the receipt thereof, give written notice
of such request to all Series F Holders and shall, subject to the limitations of
subsection 2.3(b), use its best efforts to effect as soon as practicable, and in
any event within ninety (90) days of the receipt of such request, the
registration under the Act of all Series F Registrable Securities which the
Series F Holders request to be registered in a written request given within
twenty (20) days of the mailing of such notice by the Company in accordance with
Section 4.5.

               (b)  If the Initiating Series F Holders intend to distribute the
Series F Registrable Securities covered by their request by means of an
underwriting, they shall so advise the Company as a part of their request made
pursuant to this Section 2.3 and the Company shall include such information in
the written notice referred to in subsection 2.3(a). In such event, the right of
any Series F Holder to include his Series F Registrable Securities in such
registration shall be conditioned upon such Series F Holder's participation in
such underwriting and the inclusion of such Holder's Series F Registrable
Securities in the underwriting (unless otherwise mutually agreed by a majority
in interest of the Series F Initiating Holders and such Series F Holder) to the
extent provided herein. All Series F Holders proposing to distribute their
securities through such underwriting shall (together with the Company as
provided in subsection 2.5(e)) enter into an underwriting agreement in customary
form with the underwriter or underwriters selected for such underwriting by a
majority in interest of the Series F Initiating Holders. Notwithstanding any
other provision of this Section 2.3, if the underwriter advises the Series F
Initiating Holders in writing that marketing factors require a limitation of the
number of shares to be underwritten, then the Series F Initiating Holders shall
so advise all holders of Series F Registrable Securities which would otherwise
be underwritten pursuant hereto, and the number of shares of Series F
Registrable Securities that may be included in the underwriting shall be
allocated among all holders thereof, including the Series F Initiating Holders,
in proportion (as nearly as practicable) to the amount of Series F Registrable
Securities of the Company owned by each Series F Holder; provided, however, that
the number of shares of Series F Registrable Securities to be included in such
underwriting shall not be reduced unless all other securities proposed to be
sold by persons other than the Series F Holders are first entirely excluded from
the underwriting.

               (c)  The Company is obligated to effect only two (2) such
registrations pursuant to this Section 2.3, provided, however, that any request
for registration that is withdrawn

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by the Series F Initiating Holders shall not count against the limit of two (2)
requested registrations pursuant to this Section 2.3.

               (d)  Notwithstanding the foregoing, if the Company shall furnish
to Series F Holders requesting a registration statement pursuant to this Section
2.3, a certificate signed by the President of the Company stating that in the
good faith judgment of the Board of Directors of the Company, it would be
seriously detrimental to the Company and its shareholders for such registration
statement to be filed and it is therefore essential to defer the filing of such
registration statement, the Company shall have the right to defer such filing
for a period of not more than ninety (90) days after receipt of the request of
the Series F Initiating Holders; provided, however, that the Company may not
utilize this right more than once in any twelve (12) month period.

               (e)  Notwithstanding the foregoing, the Company shall not be
obligated to effect, or to take any action to effect, any such registration
pursuant to this Section 2.3 during the period starting with the date sixty (60)
days prior to the Company's good faith estimate of the date of filing of, and
ending on a date ninety (90) days after the effective date of, a Company-
initiated registration; provided the Company is actively employing in good faith
all reasonable efforts to cause such registration statement to become effective.

          2.4  Company Registration.  If (but without any obligation to do so)
               --------------------
the Company proposes to register (including for this purpose a registration
effected by the Company for shareholders other than the Holders) any of its
Common Stock or other securities under the Act in connection with a public
offering of such securities solely for cash (other than a registration relating
either to the sale of securities to participants in a Company stock option,
stock purchase or similar plan or to a SEC Rule 145 transaction, or a
registration on any form which does not include substantially the same
information as would be required to be included in a registration statement
covering the sale of the Registrable Securities), the Company shall, at such
time, promptly give each Holder written notice of such registration.  Upon the
written request of each Holder given within twenty (20) days after mailing of
such notice by the Company in accordance with Section 4.5, the Company shall,
subject to the provisions of Section 2.9, use its best efforts to cause to be
registered under the Act all of the Registrable Securities that each such Holder
has requested to be registered.

          2.5  Obligations of the Company.  Whenever required under this
               --------------------------
Section 2 to effect the registration of any Registrable Securities, the Company
shall, as expeditiously as reasonably possible:

               (a)  Prepare and file with the SEC a registration statement with
respect to such Registrable Securities and use its best efforts to cause such
registration statement to become effective, and, upon the request of the Holders
of a majority of the Registrable Securities registered thereunder, keep such
registration statement effective for up to one hundred twenty (120) days.

               (b)  Prepare and file with the SEC such amendments and
supplements to such registration statement and the prospectus used in connection
with such registration statement

                                       6
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as may be necessary to comply with the provisions of the Act with respect to the
disposition of all securities covered by such registration statement.

               (c)  Furnish to the Holders such numbers of copies of a
prospectus, including a preliminary prospectus, in conformity with the
requirements of the Act, and such other documents as they may reasonably request
in order to facilitate the disposition of Registrable Securities owned by them.

               (d)  Use its best efforts to register and qualify the securities
covered by such registration statement under such other securities or Blue Sky
laws of such jurisdictions as shall be reasonably requested by the Holders,
provided that the Company shall not be required in connection therewith or as a
condition thereto to qualify to do business or to file a general consent to
service of process in any such states or jurisdictions.

               (e)  In the event of any underwritten public offering, enter into
and perform its obligations under an underwriting agreement, in usual and
customary form, with the managing underwriter of such offering. Each Holder
participating in such underwriting shall also enter into and perform its
obligations under such an agreement.

               (f)  Notify each Holder of Registrable Securities covered by such
registration statement at any time when a prospectus relating thereto is
required to be delivered under the Act of the happening of any event as a result
of which the prospectus included in such registration statement, as then in
effect, includes an untrue statement of a material fact or omits to state a
material fact required to be stated therein or necessary to make the statements
therein not misleading in the light of the circumstances then existing.

               (g)  Cause all such Registrable Securities registered pursuant
hereunder to be listed on each securities exchange on which similar securities
issued by the Company are then listed.

               (h)  Provide a transfer agent and registrar for all Registrable
Securities registered pursuant hereunder and a CUSIP number for all such
Registrable Securities, in each case not later than the effective date of such
registration.

               (i)  Furnish, at the request of any Holder requesting
registration of Registrable Securities pursuant to this Section 2, on the date
that such Registrable Securities are delivered to the underwriters for sale in
connection with a registration pursuant to this Section 2, if such securities
are being sold through underwriters, or, if such securities are not being sold
through underwriters, on the date that the registration statement with respect
to such securities becomes effective, (i) an opinion, dated such date, of the
counsel representing the Company for the purposes of such registration, in form
and substance as is customarily given to underwriters in an underwritten public
offering, addressed to the underwriters, if any, and to the Holders requesting
registration of Registrable Securities and (ii) a letter dated such date, from
the independent certified public accountants of the Company, in form and
substance as is customarily given by independent certified public accountants to
underwriters in an underwritten public offering, addressed to the underwriters,
if any, and to the Holders requesting registration of Registrable Securities.

                                       7
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          2.6  Furnish Information. It shall be a condition precedent to the
               -------------------
obligations of the Company to take any action pursuant to this Section 2 with
respect to the Registrable Securities of any selling Holder that such Holder
shall furnish to the Company such information regarding itself, the Registrable
Securities held by it, and the intended method of disposition of such securities
as shall be required to effect the registration of such Holder's Registrable
Securities.

          2.7  Expenses of Demand Registration.
               -------------------------------

               (a)  All expenses other than underwriting discounts and
commissions incurred in connection with registrations, filings or qualifications
pursuant to Section 2.2, including (without limitation), all registration,
filing and qualification fees, printers and accounting fees, fees and
disbursements of counsel for the Company, and the reasonable fees and
disbursements of one counsel for the selling Holders shall be borne by the
Company with respect to one (1) such registration; provided, however, that the
Company shall not be required to pay for any expenses of any registration
proceeding begun pursuant to Section 2.2 if the registration request is
subsequently withdrawn at the request of the holders of a majority of the
Registrable Securities to be registered (in which case all participating Holders
shall bear such expenses); provided further, however, that if at the time of
such withdrawal, the Holders have learned of a material adverse change in the
condition, business, or prospects of the Company from that known to the Holders
at the time of their request, then the Holders shall not be required to pay any
of such expenses and shall retain their rights pursuant to Section 2.2.

               (b)  All expenses other than underwriting discounts and
commissions incurred in connection with registrations, filings or qualifications
pursuant to Section 2.3, including (without limitation), all registration,
filing and qualification fees, printers and accounting fees, fees and
disbursements of counsel for the Company, and the reasonable fees and
disbursements of one counsel for the selling Series F Holders shall be borne by
the Company with respect to two (2) such registrations; provided, however, that
the Company shall not be required to pay for any expenses of any registration
proceeding begun pursuant to Section 2.3 if the registration request is
subsequently withdrawn at the request of the holders of a majority of the Series
F Registrable Securities to be registered (in which case all participating
Series F Holders shall bear such expenses), unless the holders of a majority of
the Series F Registrable Securities agree to forfeit their right to one demand
registration pursuant to Section 2.3; provided further, however, that if at the
time of such withdrawal, the Series F Holders have learned of a material adverse
change in the condition, business, or prospects of the Company from that known
to the Holders at the time of their request, then the Series F Holders shall not
be required to pay any of such expenses and shall retain their rights pursuant
to Section 2.3; and provide further, that if prior to the time of such
withdrawal, the underwriters have advised the Series F Holders that marketing
factors would require a limitation on the number of shares to be registered by
such Series F Holders, then the Series F Holders shall not be required to pay
any of such expenses and shall retain their rights pursuant to Section 2.3.

          2.8  Expenses of Company Registration. The Company shall bear and pay
               --------------------------------
all expenses incurred in connection with any registration, filing or
qualification of Registrable Securities with respect to all such registrations
pursuant to Section 2.4 for each Holder (which right may be assigned as provided
in Section 2.14), including (without limitation) all registration, filing, and

                                       8
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qualification fees, printers and accounting fees relating or apportionable
thereto and the fees and disbursements of one counsel for the selling Holders
selected by them, but excluding underwriting discounts and commissions relating
to Registrable Securities.

          2.9  Underwriting Requirements. In connection with any offering
               -------------------------
involving an underwriting of shares being issued by the Company, the Company
shall not be required under Section 2.4 to include any of the Holders'
securities in such underwriting unless they enter into an underwriting agreement
in customary form with the lead underwriter selected by the Company, and then
only in such quantity as will not, in the opinion of the underwriters,
jeopardize the success of the offering by the Company.  If the total amount of
securities, including Registrable Securities, requested by shareholders to be
included in such offering exceeds the amount of securities sold other than by
the Company that the underwriters reasonably believe compatible with the success
of the offering, then the Company shall be required to include in the offering
only that number of such securities, including Registrable Securities, which the
underwriters believe will not jeopardize the success of the offering (the
securities so included to be apportioned pro rata among the selling shareholders
according to the total amount of securities entitled to be included therein
owned by each selling shareholder or in such other proportions as shall mutually
be agreed to by such selling shareholders); provided that the number of shares
of Registrable Securities to be included in such underwriting shall not be
reduced unless all other securities held by persons other than the Holders or
the Company are first entirely excluded from the underwriting; but in no event
shall (i) the amount of securities of the selling Holders included in the
offering be reduced below thirty percent (30%) of the total amount of securities
included in such offering, unless such offering is the initial public offering
of the Company's securities, in which case the selling shareholders may be
excluded if the underwriters make the determination described above and no other
shareholder's securities are included or (ii) notwithstanding (i) above, any
shares being sold by a shareholder exercising a demand registration right
similar to that granted in Section 2.2 or 2.3 be excluded from such offering.
For purposes of the preceding parenthetical concerning apportionment, for any
selling shareholder which is a holder of Registrable Securities and which is a
partnership or corporation, the partners, retired partners and shareholders of
such holder, or the estates and family members of any such partners and retired
partners and any trusts for the benefit of any of the foregoing persons shall be
deemed to be a single "selling shareholder," and any pro rata reduction with
respect to such "selling shareholder" shall be based upon the aggregate amount
of shares carrying registration rights owned by all entities and individuals
included in such "selling shareholder," as defined in this sentence.

          2.10 Delay of Registration. No Holder shall have any right to obtain
               ---------------------
or seek an injunction restraining or otherwise delaying any such registration as
the result of any controversy that might arise with respect to the
interpretation or implementation of this Section 2.

          2.11 Indemnification. In the event any Registrable Securities are
               ---------------
included in a registration statement under this Section 2:

               (a)  To the extent permitted by law, the Company will indemnify
and hold harmless each Holder, any underwriter (as defined in the Act) for such
Holder and each person, if any, who controls such Holder or underwriter within
the meaning of the Act or the Securities Exchange Act of 1934, as amended (the
"1934 Act"), against any losses, claims, damages, or

                                       9
<PAGE>

liabilities (joint or several) to which they may become subject under the Act,
the 1934 Act or other federal or state law, insofar as such losses, claims,
damages, or liabilities (or actions in respect thereof) arise out of or are
based upon any of the following statements, omissions or violations
(collectively a "Violation"): (i) any untrue statement or alleged untrue
statement of a material fact contained in such registration statement, including
any preliminary prospectus or final prospectus contained therein or any
amendments or supplements thereto, (ii) the omission or alleged omission to
state therein a material fact required to be stated therein, or necessary to
make the statements therein not misleading, or (iii) any violation or alleged
violation by the Company of the Act, the 1934 Act, any state securities law or
any rule or regulation promulgated under the Act, the 1934 Act or any state
securities law; and the Company will pay as incurred to each such Holder,
underwriter or controlling person, any legal or other expenses reasonably
incurred by them in connection with investigating or defending any such loss,
claim, damage, liability, or action; provided that the Company will not be
liable in any such case to the extent that any such loss, claim, damage,
liability, or action arises out of or is based on any untrue statement or
omission based upon written information furnished to the Company by such Holder
or underwriter and stated to be specifically for use therein; and provided
further that the indemnity agreement contained in this subsection 2.11(a) shall
not apply to amounts paid in settlement of any such loss, claim, damage,
liability, or action if such settlement is effected without the consent of the
Company (which consent shall not be unreasonably withheld), nor shall the
Company be liable in any such case for any such loss, claim, damage, liability,
or action to the extent that it arises out of or is based upon a Violation which
occurs in reliance upon and in conformity with written information furnished
expressly for use in connection with such registration by any such Holder,
underwriter or controlling person.

               (b)  To the extent permitted by law, each selling Holder
(severally and not jointly) will indemnify and hold harmless the Company, each
of its directors, each of its officers who has signed the registration
statement, each person, if any, who controls the Company within the meaning of
the Act, any underwriter, any other Holder selling securities in such
registration statement and any controlling person of any such underwriter or
other Holder, against any losses, claims, damages, or liabilities (joint or
several) to which any of the foregoing persons may become subject, under the
Act, the 1934 Act or other federal or state law, insofar as such losses, claims,
damages, or liabilities (or actions in respect thereto) arise out of or are
based upon any Violation, in each case to the extent (and only to the extent)
that such Violation occurs in reliance upon and in conformity with written
information furnished by such Holder expressly for use in connection with such
registration; and each such Holder will pay, as incurred, any legal or other
expenses reasonably incurred by any person intended to be indemnified pursuant
to this subsection 2.11(b), in connection with investigating or defending any
such loss, claim, damage, liability, or action; provided, however, that the
indemnity agreement contained in this subsection 2.11(b) shall not apply to
amounts paid in settlement of any such loss, claim, damage, liability or action
if such settlement is effected without the consent of the Holder, which consent
shall not be unreasonably withheld; provided that in no event shall any
indemnity under this subsection 2.11(b) exceed the net proceeds from the
offering received by such Holder.

               (c)  Promptly after receipt by an indemnified party under this
Section 2.11 of notice of the commencement of any action (including any
governmental action), such indemnified party will, if a claim in respect thereof
is to be made against any indemnifying party under this Section 2.11, deliver to
the indemnifying party a written notice of the commencement thereof and

                                      10
<PAGE>

the indemnifying party shall have the right to participate in, and, to the
extent the indemnifying party so desires, jointly with any other indemnifying
party similarly noticed, to assume the defense thereof with counsel mutually
satisfactory to the parties; provided, however, that an indemnified party shall
have the right to retain its own counsel, with the fees and expenses to be paid
by the indemnifying party, if representation of such indemnified party by the
counsel retained by the indemnifying party would be inappropriate due to actual
or potential differing interests between such indemnified party and any other
party represented by such counsel in such proceeding. The failure to deliver
written notice to the indemnifying party within a reasonable time of the
commencement of any such action, if prejudicial to its ability to defend such
action, shall relieve such indemnifying party of any liability to the
indemnified party under this Section 2.11, but the omission so to deliver
written notice to the indemnifying party will not relieve it of any liability
that it may have to any indemnified party otherwise than under this Section
2.11. No claim may be settled without the consent of the indemnifying party
(which consent shall not be unreasonably withheld). No indemnifying party, in
defense of any such claim or litigation, shall, except with the consent of each
indemnifying party, consent to entry of any judgement or enter into any
settlement with does not include as an unconditional term thereof the giving by
the claimant or plaintiff to such indemnified party of a release from all
liability in respect to such claim or litigation.

          (d)  If the indemnification provided for in this Section 2.11 is held
by a court of competent jurisdiction to be unavailable to an indemnified party
with respect to any loss, liability, claim, damage, or expense referred to
therein, then the indemnifying party, in lieu of indemnifying such indemnified
party hereunder, shall contribute to the amount paid or payable by such
indemnified party as a result of such loss, liability, claim, damage, or expense
in such proportion as is appropriate to reflect the relative fault of the
indemnifying party on the one hand and of the indemnified party on the other in
connection with the statements or omissions that resulted in such loss,
liability, claim, damage, or expense as well as any other relevant equitable
considerations; provided, that in no event shall any contribution by a Holder
                --------
under this Subsection 2.11(d) exceed the net proceeds from the offering received
by such Holder.  The relative fault of the indemnifying party and of the
indemnified party shall be determined by reference to, among other things,
whether the untrue or alleged untrue statement of a material fact or the
omission to state a material fact relates to information supplied by the
indemnifying party or by the indemnified party and the parties' relative intent,
knowledge, access to information, and opportunity to correct or prevent such
statement or omission.

          (e)  The obligations of the Company and Holders under this Section
2.11 shall survive the completion of any offering of Registrable Securities in a
registration statement under this Section 2, and otherwise.

    2.12  Reports Under Securities Exchange Act of 1934.  With a view to making
          ---------------------------------------------
available to the Holders the benefits of Rule 144 promulgated under the Act and
any other rule or regulation of the SEC that may at any time permit a Holder to
sell securities of the Company to the public without registration or pursuant to
a registration on Form S-3, the Company agrees to:

          (a)  make and keep public information available, as those terms are
understood and defined in SEC Rule 144, at all times after ninety (90) days
after the effective date

                                      11
<PAGE>

of the first registration statement filed by the Company for the offering of its
securities to the general public;

                (b) take such action, including the voluntary registration of
its Common Stock under Section 12 of the 1934 Act, as is necessary to enable the
Holders to utilize Form S-3 for the sale of their Registrable Securities, such
action to be taken as soon as practicable after the end of the fiscal year in
which the first registration statement filed by the Company for the offering of
its securities to the general public is declared effective;

                (c) file with the SEC in a timely manner all reports and other
documents required of the Company under the Act and the 1934 Act; and

                (d) furnish to any Holder, so long as the Holder owns any
Registrable Securities, forthwith upon request (i) a written statement by the
Company that it has complied with the reporting requirements of SEC Rule 144 (at
any time after ninety (90) days after the effective date of the first
registration statement filed by the Company), the Act and the 1934 Act (at any
time after it has become subject to such reporting requirements), or that it
qualifies as a registrant whose securities may be resold pursuant to Form S-3
(at any time after it so qualifies), (ii) a copy of the most recent annual or
quarterly report of the Company and such other reports and documents so filed by
the Company, and (iii) such other information as may be reasonably requested in
availing any Holder of any rule or regulation of the SEC which permits the
selling of any such securities without registration or pursuant to such form.

          2.13  Form S-3 Registration. In case the Company shall receive from
                ---------------------
any Holder or Holders of the Registrable Securities a written request or
requests that the Company effect a registration on Form S-3 or any successor or
similar form promulgated under the Act ("Form S-3") and any related
qualification or compliance with respect to all or a part of the Registrable
Securities owned by such Holder or Holders, the Company will:

                (a) promptly give written notice of the proposed registration,
and any related qualification or compliance, to all other Holders; and

                (b) as soon as practicable, effect such registration and all
such qualifications and compliances as may be so requested and as would permit
or facilitate the sale and distribution of all or such portion of such Holder's
or Holders' Registrable Securities as are specified in such request, together
with all or such portion of the Registrable Securities of any other Holder or
Holders joining in such request as are specified in a written request given
within twenty (20) days after receipt of such written notice from the Company;
provided, however, that the Company shall not be obligated to effect any such
registration, qualification or compliance, pursuant to this Section 2.13, (i) if
Form S-3 is not available for such offering by the Holders; (ii) if the Holders,
together with the holders of any other securities of the Company entitled to
inclusion in such registration, propose to sell Registrable Securities and such
other securities (if any) at an aggregate price to the public (net of any
underwriters' discounts or commissions) of less than $1,000,000; (iii) if the
Company shall furnish to the Holders a certificate signed by the president of
the Company stating that in the good faith judgment of the Board of Directors of
the Company it would be seriously detrimental to the Company and its
shareholders for such Form S-3 Registration to be

                                      12
<PAGE>

effected at such time, in which event the Company shall have the right to defer
the filing of the Form S-3 registration statement for a period of not more than
ninety (90) days after receipt of the request of the Holder or Holders under
this Section 2.13; provided, however, that the Company shall not utilize this
right more than once in any twelve (12) month period; or (iv) in any particular
jurisdiction in which the Company would be required to qualify to do business or
to execute a general consent to service of process in effecting such
registration, qualification or compliance.

                (c) Subject to the foregoing, the Company shall file a
registration statement covering the Registrable Securities and other securities
so requested to be registered as soon as practicable after receipt of the
request or requests of the Holders. The Company shall bear all expenses incurred
in connection with a registration requested pursuant to Section 2.13 with
respect to three (3) such registrations per calendar year, including (without
limitation) all registration, filing, qualification, printer's and accounting
fees and the reasonable fees and disbursements of counsel for the selling Holder
or Holders. With respect to any additional registrations requested pursuant to
Section 2.13, all expenses incurred in connection with a registration requested
pursuant to Section 2.13, including (without limitation) all registration,
filing, qualification, printer's and accounting fees and the reasonable fees and
disbursements of counsel for the selling Holder or Holders shall be borne by the
Holders of such securities pro rata on the basis of the number of shares so
registered. Registrations effected pursuant to this Section 2.13 shall not be
counted as demands for registration or registrations effected pursuant to
Section 2.2, 2.3 or 2.4.

                (d) If the registration effected pursuant to this Section 2.13
is an underwritten offering then the provisions of Section 2.2(b) shall apply to
such registration.

          2.14  Assignment of Registration Rights. The rights to cause the
                ---------------------------------
Company to register Registrable Securities pursuant to this Section 2 may be
assigned by a Holder to a transferee or assignee of at least 400,000 shares of
such securities provided the Company is, within a reasonable time after such
transfer, furnished with written notice of the name and address of such assignee
and the securities with respect to which such registration rights are being
assigned; and provided, further, that such assignment shall be effective only if
immediately following such transfer or assignment the further disposition of
such securities by the transferee or assignee is restricted under the Act.  The
foregoing 400,000 share limitation shall not apply, however, to transfers by a
Holder to shareholders, affiliated entities, partners or retired partners of the
Holder (including spouses and ancestors, lineal descendants and siblings of such
partners or spouses who acquire Registrable Securities by gift, will or
intestate succession) if all such transferees or assignees agree in writing to
appoint a single representative as their attorney in fact for the purpose of
receiving any notices and exercising their rights under this Section 2.

          2.15  Limitations on Subsequent Registration Rights. From and after
                ---------------------------------------------
the date of this Agreement, the Company shall not, without the prior written
consent of the Holders of a majority of the outstanding Registrable Securities,
enter into any agreement with any holder or prospective holder of any securities
of the Company which would allow such holder or prospective holder (a) to
include such securities in any registration filed under Section 2.2 or 2.3
hereof, unless under the terms of such agreement, such holder or prospective
holder may include such securities in any such registration only to the extent
that the inclusion of his securities will not reduce the amount of the
Registrable Securities of the Holders which is included or (b) to make a demand

                                      13
<PAGE>

registration which could result in such registration statement being declared
effective prior to the earlier of either of the dates set forth in subsection
2.3(a) or within one hundred eighty (180) days of the effective date of any
registration effected pursuant to Section 2.2 or 2.3. Notwithstanding the
foregoing, without the consent of the holders of a majority of the outstanding
Registrable Securities, upon the issuance of additional warrants to purchase up
to 80,000 shares of Series F Preferred Stock issued to vendors, lessors and
lenders (which warrants are approved by the Board of Directors of the Company),
and upon the execution by the holders thereof of counterpart signature pages
hereto, the Company may cause such holders to become parties to this Agreement,
as a Series F Holder.

          2.16  "Market Stand-Off" Agreement. Each Holder hereby agrees that
                 ---------------------------
during the period of duration (up to, but not exceeding one hundred eighty (180)
days) specified by the Company and the lead underwriter following the effective
date of a registration statement of the Company filed under the Act, it shall
not, to the extent requested by the underwriter, sell or otherwise transfer or
dispose of (other than to donees who agree to be similarly bound) any Common
Stock of the Company held by it at any time during such period except Common
Stock included in such registration; provided, however, that:

                (a) such agreement shall be applicable only to the first such
registration statement of the Company which covers Common Stock (or other
securities) to be sold on its behalf to the public in an underwritten offering;
and

                (b) each officer, director and holder of one percent (1%) of the
equity of the Company and all other persons with registration rights (whether or
not pursuant to this Agreement) enters into and is bound by a similar agreement.

     Notwithstanding anything herein to the contrary, this Section 2.16 shall
not be construed to restrict any Purchaser or its affiliates from engaging in
any brokerage, investment advisory, financial advisory, anti-raid advisory,
merger advisory, financing, asset management, trading, market making, arbitrage
and other similar activities conducted in the ordinary course of its or its
affiliates' business, with respect to shares acquired in the public markets.

     To enforce the foregoing covenant, the Company may impose stop-transfer
instructions with respect to the Registrable Securities of the Holder (and the
shares or securities of every other person subject to the foregoing restriction)
until the end of such period, and each Holder agrees that, if so requested, such
Holder will execute an agreement in the form provided by the underwriter
containing terms which are essentially consistent with the provisions of this
Section 2.16.

     The Company further covenants that it shall use its reasonable best efforts
to cause its officers, directors, and one percent (1%) shareholders, and all
other persons with registration rights, to enter into similar market stand off
agreements with a duration of up to one hundred eighty (180) days following the
effective date of a registration statement of the Company that is not the
Company's first such registration statement as described in Section 2.16(a).

          2.17  Termination of Registration Rights. No Holder shall be
                ----------------------------------
entitled to exercise any right provided for in this Section 2 at and after such
time following the Company's initial public offering as such Holder holds
Registrable Securities equal to one percent (1%) or less of the

                                      14
<PAGE>

outstanding stock of the Company and is able to dispose of all of its
Registrable Securities in one three(3)-month period pursuant to the provisions
of Rule 144, provided, however, that notwithstanding the availability of an
exemption under Rule 144 for the resale of Registrable Securities held by the
Initiating Series F Holders only, the rights of the Initiating Series F Holders
to cause the Company to effect a registration statement with respect to such
shares shall not terminate until the fifth (5th) anniversary of the Company's
initial public offering, as measured from the effective date of the Company's
registration statement filed under the Act and related to such offering.

     Section 3. Additional Rights.
                -----------------

          3.1   Right of First Offer. Subject to the terms and conditions
                --------------------
specified in this Section 3.1, the Company hereby grants to each Major Investor
a right of first offer with respect to future sales by the Company of its New
Securities (as hereinafter defined).  For purposes of this Section 3.1, the term
Major Investor includes any partners, shareholders or affiliates of an Investor.
Subject to Section 3.1(f) below, a Major Investor shall be entitled to apportion
the right of first offer hereby granted among itself and its partners,
shareholders and affiliates in such proportions as it deems appropriate.

                (a) In the event the Company proposes to issue New Securities,
it shall give each Major Investor written notice (the "Notice") of its intention
stating (i) a description of the New Securities it proposes to issue, (ii) the
number of shares of New Securities it proposes to offer, (iii) the price per
share at which, and other terms on which, it proposes to offer such New
Securities and (iv) the number of shares that the Major Investor has the right
to purchase under this Section 3.1, based on the Major Investor's Percentage (as
defined in Section 3.1(d)(ii)).

                (b) Within twenty (20) days after the Notice is given (in
accordance with Section 4.5), the Major Investor may elect to purchase, at the
price and on the terms specified in the Notice, up to the number of shares of
the New Securities proposed to be issued that the Major Investor has the right
to purchase based on the Major Investor's percentage. An election to purchase
shall be made in writing and must be given to the Company within such twenty
(20) day period (in accordance with Section 4.5). The Company shall promptly, in
writing, inform each Major Investor that purchases all the New Securities
available to it (each, a "Fully-Exercising Investor") of any other Major
                          -------------------------
Investor's failure to do likewise. During the ten (10)-day period commencing
after receipt of such information, each Fully-Exercising Investor shall be
entitled to obtain that portion of the New Securities for which Major Investors
were entitled to subscribe but which were not subscribed for by the Major
Investors that is equal to the Major Investor's Percentage. The closing of the
sale of New Securities by the Company to the participating Major Investor upon
exercise of its rights under this Section 3.1 shall take place simultaneously
with the closing of the sale of New Securities to third parties.

                (c) The Company shall have forty-five (45) days after the last
date on which the Major Investors' right of first offer lapsed to enter into an
agreement (pursuant to which the sale of New Securities covered thereby shall be
closed, if at all, within thirty (30) days from the execution thereof) to sell
the New Securities which the Major Investors did not elect to purchase under
this Section 3.1, at or above the price and upon terms not materially more
favorable to the

                                      15
<PAGE>

purchasers of such securities than the terms specified in the initial Notice
given in connection with such sale. In the event the Company has not entered
into an agreement to sell the New Securities within such forty-five (45) day
period (or sold and issued New Securities in accordance with the foregoing
within thirty (30) days from the date of said agreement), the Company shall not
thereafter issue or sell any New Securities without first offering such New
Securities to the Major Investors in the manner provided in this Section 3.1.

          (d)  (i)  "New Securities" shall mean any shares of, or securities
convertible into or exercisable for any shares of, any class of the Company's
capital stock; provided that "New Securities" does not include: (i) the Series
A, Series B, Series C, Series D, Series E or Series F Preferred Stock authorized
or outstanding as of the date hereof, issuable upon exercise of warrants
outstanding on the date hereof, or issued under the Series F Agreement, or the
Common Stock issuable upon conversion thereof; (ii) up to 100,000 shares of
Series F Preferred Stock issuable upon the exercise of the warrants (including
the F Warrant) to purchase Series F Preferred Stock issued to vendors, lessors
and lenders at an exercise price per share of not less than $8.53884, or the
Common Stock issuable upon conversion thereof (which warrants are approved by
the Board of Directors of the Company), (iii) securities issued pursuant to the
acquisition of another business entity by the Company by merger, purchase of
substantially all of the assets of such entity, or other reorganization whereby
the Company owns not less than a majority of the voting power of such entity;
(iv) up to 16,570,128 shares of Common Stock (or such higher number of shares as
is approved by the board of directors, the holders of at least a majority of the
outstanding Series C, Series D, Series E and Series F Preferred, voting
together) issued or issuable to officers, directors, employees and consultants
of the corporation, since the date of incorporation, pursuant to the
corporation's 1997 Stock Plan; (v) up to 600,000 shares of Series F Preferred
Stock (including shares issued upon the exercise of warrants to purchase Series
F Preferred Stock) granted or issued in connection with the acquisition or
licensing of patents or patent rights; (vi) shares of the Company's Common Stock
or Preferred Stock of any series issued in connection with any stock split,
stock dividend or recapitalization of the Company; (vii) Common Stock issued
upon exercise of warrants, options or convertible securities if the issuance of
such warrants, options or convertible securities was a result of the exercise of
the right of first offer granted under this Section 3.1 or was subject to the
right of first offer granted under this Section 3.1; and (viii) securities sold
to the public in an offering pursuant to a registration statement filed with the
Securities and Exchange Commission under the Act.

               (ii) The applicable "Percentage" for each Major Investor shall be
the number of shares of New Securities calculated by dividing (i) the total
number of shares of Common Stock owned by the Major Investor (assuming
conversion of all shares of Preferred Stock and exercise of any options or
warrants held by said Major Investor) by (ii) the total number of shares of
Common Stock outstanding at the time the Notice is given (assuming conversion of
all shares of Preferred Stock and exercise of all outstanding rights, options
and warrants to acquire Common Stock of the Company).

          (e)  The right of first offer granted under this Section 3.1 shall
expire upon the consummation of the Company's sale of its Common Stock in a bona
fide, firm commitment underwriting pursuant to a registration statement on Form
S-1 under the Securities Act of 1933, as amended, which results in aggregate
gross cash proceeds to the Company in excess of $30,000,000

                                      16
<PAGE>

and the public offering price of which is not less than $13.00 per share
(adjusted to reflect subsequent stock dividends, stock splits, recapitalizations
and the like) (other than a registration statement relating either to the sale
of securities to employees of the Company pursuant to a stock option, stock
purchase or similar plan or a SEC Rule 145 transaction) (a "Qualified IPO").

          (f)  The right of first offer granted under this section may only be
assigned by a Major Investor to a transferee or assignee of the Major Investor's
shares of the Company's stock acquiring the lesser of (a) at least 400,000 of
the Major Investor's shares of the Company's Common Stock (treating all shares
of Preferred Stock for this purpose as though converted into Common Stock)
(equitably adjusted for any stock splits, subdivision stock dividends, changes,
combinations or the like) or (b) all of the Major Investor's remaining shares of
the Company's stock, provided, however, that transfers to affiliate entities
shall not be subject to the above thresholds.  In the event that the Major
Investor shall assign its right of first offer pursuant to this Section 3.1 in
connection with the transfer of less than all of its shares of the Company's
stock, the Major Investor shall also retain its right of first offer.

          3.2  Delivery of Financial Statements.
               --------------------------------

               (a)  The Company shall deliver to each Holder as soon as
practicable, but in any event within ninety (90) days after the end of each
fiscal year of the Company, an income statement for such fiscal year, a balance
sheet of the Company as of the end of such year, and statements of income and
cash flows for such year, such year-end financial reports to be in reasonable
detail, prepared in accordance with generally accepted accounting principles
("GAAP"), and audited and certified by independent public accountants of
nationally recognized standing selected by the Company.

               (b)  The Company shall deliver to each Major Investor (with any
shares of Registrable Securities held or acquired by affiliated entities or
persons being aggregated for the purpose of determining the availability of this
right):

                    (i)   as soon as practicable, but in any event within forty-
five (45) days after the end of each of the first three (3) fiscal quarters of
each fiscal year of the Company, a balance sheet of the Company as of the end of
each such quarterly period, and statements of income and cash flows for such
period and for the current fiscal year to date, prepared in accordance with
GAAP, subject to changes resulting from normal year-end audit adjustments, all
in reasonable detail and certified as being prepared in accordance with GAAP by
the principal financial or accounting officer of the Company, except that such
financial statements need not contain the notes required by GAAP;

                    (ii)  as soon as practicable, but in any event within thirty
(30) days after the end of each month, an unaudited income statement and a
statement of cash flows and balance sheet for and as of the end of such month,
in reasonable detail;

                    (iii) as soon as practicable, but in any event within thirty
(30) days prior to the end of each fiscal year, a budget and business plan for
the next fiscal year, prepared on a monthly basis, including balance sheets and
sources and applications of funds statements for such

                                      17
<PAGE>

months and, as soon as prepared, any other budgets or revised budgets prepared
by the Company; and

                    (iv)  such other information relating to the financial
condition, business, prospects or corporate affairs of the Company as the Holder
may from time to time reasonably request; provided, however, that the Company
shall not be obligated to provide information which it deems in good faith to be
proprietary.

          3.3  Termination of Information Rights. The covenants set forth in
               ---------------------------------
Section 3.2 shall terminate as to the Holders and be of no further force or
effect immediately upon the consummation of a Qualified IPO; provided, however,
that for the two (2)-year period commencing on the effective date of such
Qualified IPO, the Company shall deliver to each holder of at least 500,000
shares of Series E Preferred Stock or Common Stock issued upon conversion of
Series E Preferred Stock, copies of the Company's 10-Ks, 10-Qs and Annual
Reports to Shareholders, promptly after such documents are filed with the SEC.

          3.4  Observer Rights.
               ---------------

               (a)  Series D Observer. Subject to the provisions of this Section
                    -----------------
3.4, the Company shall invite a representative of each holder of at least
2,000,000 shares of Series D Preferred (excluding any holder of which an
affiliate is a director) to attend all meetings of its Board of Directors in a
nonvoting observer capacity (with all shares of Series D Preferred held or
acquired by affiliated entities or persons being aggregated for the purpose of
determining the availability of this right) and, in this respect, shall give
such representative copies of all notices, minutes, consents, and other
materials that it provides to its directors (the "D Observer Right"); provided,
however, that such representative shall agree to hold in confidence and trust
and to act in a fiduciary manner with respect to all information so provided;
and, provided further, that the Company reserves the right to withhold any
information and to exclude such representative from any meeting or portion
thereof if access to such information or attendance at such meeting could
adversely affect the attorney-client privilege between the Company and its
counsel or would result in disclosure of trade secrets to such representative.
The D Observer Right shall terminate on the earlier of: (i) the consummation of
the Company's sale of its Common Stock in a bona fide, firm commitment
underwriting (with an nationally recognized underwriter) pursuant to a
registration statement on Form S-1 under the Securities Act of 1933, as amended
(other than a registration statement relating either to the sale of securities
to employees of the Company pursuant to a stock option, stock purchase or
similar plan or a Securities and Exchange Commission Rule 145 transaction); (ii)
such time when the Company is required to file reports pursuant to Section 13 or
15(d) of the Securities Exchange Act of 1934, as amended; or (iii) the date on
which such holder holds fewer than fifty percent (50%) of the shares of the
Series D Preferred Stock of the Company originally purchased pursuant to the
Series D Agreement; provided that for the purposes of this calculation, any
shares of Series D Preferred held by an affiliate or partner of such Holder
shall be aggregated.

               (b)  Lucent Observer. The Company shall invite a representative
                    ---------------
of Lucent Venture Partners (or one of its affiliates) to attend all regular
meetings of its Board of Directors in a nonvoting observer capacity (the "Lucent
Observer Right"); provided, however, that such representative shall agree to
hold in confidence and trust from third parties unaffiliated with

                                      18
<PAGE>

Lucent Venture Partners all information provided to such representative at or
during any such meeting; and, provided further, that the Company reserves the
right to withhold any information and to exclude such representative from any
meeting or portion thereof if access to such information or attendance at such
meeting could, in the judgement of the Company's outside counsel, adversely
affect the attorney-client privilege between the Company and its counsel or
would result in disclosure of trade secrets relating to proprietary information
regarding the Company's products or intellectual property rights to such
representative, the public disclosure of which would have a material adverse
effect on the Company. The Company will use its best efforts to ensure that any
withholding of information or any restriction of the representative's attendance
at a board meeting is strictly limited only to the extent necessary set forth in
the provisos to the preceding sentence. The Company and Lucent Venture Partners
acknowledge and agree that the representative shall not owe any fiduciary or
other duties to the shareholders of the Company and shall not otherwise have any
director or fiduciary duties or liabilities to the Company or its shareholders
except as specifically set forth in this section or under applicable law. The
Lucent Observer Right shall terminate on the earlier of: (i) the consummation of
the Company's sale of its Common Stock in a bona fide, firm commitment
underwriting (with an nationally recognized underwriter) pursuant to a
registration statement on Form S-1 under the Securities Act of 1933, as amended
(other than a registration statement relating either to the sale of securities
to employees of the Company pursuant to a stock option, stock purchase or
similar plan or a Securities and Exchange Commission Rule 145 transaction),
which results in aggregate gross cash proceeds to the corporation in excess of
$20,000,000 and the public offering price of which (prior to underwriting
discounts, commissions or expenses) is not less that $1.875 per share (adjusted
to reflect subsequent stock dividends, stock splits or recapitalizations) (an
"IPO") or, (ii) the closing of any merger, acquisition or sale of all or
substantially all assets of the Company, if the shareholders of the Company
immediately prior to such transaction own less than fifty percent (50%) of the
outstanding voting securities of the surviving or acquiring corporation
immediately after the transaction.

               (c)  Intel Observer.
                    --------------

                    (i)   Intel Observer Right. The Company shall permit a
                          --------------------
representative of Intel (the "Intel Observer") to attend all meetings of the
Company's Board of Directors (the "Board"), the Board's Executive Committee, if
any, and all other Board committees that function other than in solely advisory,
non-binding capacities (whether in person, telephonic or other) in a non-voting,
observer capacity and shall provide to Intel, concurrently with the members of
the Board, and in the same manner, notice of such meeting and a copy of all
materials provided to such members. The Intel Observer, however, may be excluded
from any meeting or portion thereof and need not be provided such materials if a
majority of the Board reasonably believes that the Intel Observer's attendance
at such meeting or access to such information would: (a) adversely affect
attorney-client privilege between the Company and its counsel or (b) involve a
conflict of interest between the Company and Intel on a material issue for the
Company.

                    (ii)  Confidential Information. Exchanges of confidential
                          ------------------------
and proprietary information between the Company and the Intel Observer shall be
governed by the terms of the Corporate Non-Disclosure Agreement No. 4720346,
dated February 1, 2000, executed by the Company and Intel (the "CNDA"), and any
Confidential Information Transmittal Records (each, a "CITR") provided in
connection therewith.

                                      19
<PAGE>

                    (iii) Information; Corporate Opportunities. The Company
                          ------------------------------------
acknowledges that Intel and the Intel Observer will likely have, from time to
time, information that may be of interest to the Company ("Information")
regarding a wide variety of matters including, by way of example only, (a)
Intel's technologies, plans and services, and plans and strategies relating
thereto, (b) current and future investments Intel has made, may make, may
consider or may become aware of with respect to other companies and other
technologies, products and services, including, without limitation,
technologies, products and services that may be competitive with the Company's,
and (c) developments with respect to the technologies, products and services,
and plans and strategies relating thereto, of other companies, including,
without limitation, companies that may be competitive with the Company. The
Company recognizes that a portion of such Information may be of interest to the
Company. The Information may or may not be known by the Intel Observer. The
Company, as a material part of the consideration for this Agreement and the
Series E Agreement, agrees that Intel and the Intel Observer shall have no duty
to disclose any Information to the Company or permit the Company to participate
in any projects or investments based on any Information, or to otherwise take
advantage of any opportunity that may be of interest to the Company if it were
aware of such Information, and hereby waives, to the extent permitted by law,
any claim based on the corporate opportunity doctrine or otherwise that could
limit Intel's ability to pursue opportunities based on such Information or that
would require Intel or the Intel Observer to disclose any such Information to
the Company or offer any opportunity relating thereto to the Company. Nothing in
this Section 3.4(iii) is intended to modify the confidentiality obligations of
Intel and the Company as set forth in the CNDA.

                    (iv)  Termination. The rights described in this Section
                          -----------
3.4(c) shall terminate and be of no further force or effect upon the earlier to
occur of (i) the consummation of the sale of the Company's securities pursuant
to a registration statement filed by the Company under the Securities Act of
1933 in connection with the firm commitment underwritten offering of its
securities to the general public, or (ii) the date upon which Intel, together
with those entities of which Intel owns, directly or indirectly, at least fifty
percent (50%) of the voting securities, ceases to hold at least 1,506,360 shares
of Series E Preferred Stock of the Company (as adjusted for stock splits, stock
dividends and similar events). The confidentiality provisions of this Section
3.4(c), however, shall survive any such termination.

               (d)  TWCP Observer. Subject to the provisions of this Section
                    -------------
3.4, the Company shall invite a representative of Thomas Weisel Capital
Partners, LLC (or one of its affiliates) to attend all meetings of its Board of
Directors in a nonvoting observer capacity (the "TWP Observer Right"); provided,
however, that such representative shall agree to hold in confidence and to act
in a fiduciary manner with respect to all information provided to such
representative at or during any such meeting; and, provided further, that the
Company reserves the right to withhold any information and to exclude such
representative from any meeting or portion thereof if access to such information
or attendance at such meeting could, in the judgment of the Company's outside
counsel, adversely affect the attorney-client privilege between the Company and
its counsel or would result in disclosure of trade secrets relating to
proprietary information regarding the Company's products or intellectual
property rights to such representative, the public disclosure of which would
have a material adverse effect on the Company. The Company will use its best
efforts to ensure that any withholding of information or any restriction of the
representative's attendance at a board meeting is strictly limited only to the
extent necessary set forth in the provisos to the preceding sentence. The TWP
Observer Right shall terminate on the earlier of: (i) the

                                      20
<PAGE>

consummation of the Company's sale of its Common Stock in a bona fide, firm
commitment underwriting (with an nationally recognized underwriter) pursuant to
a registration statement on Form S-1 under the Securities Act of 1933, as
amended (other than a registration statement relating either to the sale of
securities to employees of the Company pursuant to a stock option, stock
purchase or similar plan or a Securities and Exchange Commission Rule 145
transaction), which results in aggregate gross cash proceeds to the corporation
in excess of $30,000,000 and the public offering price of which (prior to
underwriting discounts, commissions or expenses) is not less than $13.00 per
share (adjusted to reflect subsequent stock dividends, stock splits or
recapitalizations) (an "IPO") or (ii) the closing of any merger, acquisition or
sale of all or substantially all assets of the Company, if the shareholders of
the Company immediately prior to such transaction own less than fifty percent
(50%) of the outstanding voting securities of the surviving or acquiring
corporation immediately after the transaction.

     Section 4. Miscellaneous.
                -------------

          4.1   Assignment. Subject to the provisions of Sections 2.14 and
                ----------
3.1(f) hereof, the terms and conditions of this Agreement shall inure to the
benefit of and be binding upon the respective successors and assigns of the
parties hereto.

          4.2   Third Parties. Nothing in this Agreement, express or implied,
                -------------
is intended to confer upon any party, other than the parties hereto, and their
respective successors and assigns, any rights, remedies, obligations or
liabilities under or by reason of this Agreement, except as expressly provided
herein.

          4.3   Governing Law. This Agreement shall be governed by and
                -------------
construed under the laws of the State of California in the United States of
America as applied to agreements among California residents entered into and to
be performed entirely within California.

          4.4   Counterparts. This Agreement may be executed 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.

          4.5   Notices. Any notice required or permitted by this Agreement
                -------
shall be in writing and shall be effective when given, and shall in any event be
deemed to be given upon receipt, or, if earlier, (a) five (5) days after deposit
with the U.S. Postal Service or other applicable postal service, if delivered by
registered or certified mail, postage prepaid, (b) upon delivery, if delivered
by hand, (c) one (1) business day after the business day of deposit with Federal
Express or similar overnight courier, freight prepaid or (d) one (1) business
day after the business day of facsimile transactions, if delivered by facsimile
transmission with copy by first class mail, postage prepaid and addressed to the
party to be notified at such party's address or fax number as set forth on the
signature page or Exhibit A hereto or as subsequently modified by written
                  ---------
notice.

                                      21
<PAGE>

          4.6  Severability.    If one or more provisions of this Agreement are
               ------------
held to be unenforceable under applicable law, portions of such provisions, or
such provisions in their entirety, to the extent necessary, shall be severed
from this Agreement, and the balance of this Agreement shall be enforceable in
accordance with its terms.

          4.7  Amendment and Waiver.    Any provision of this Agreement may be
               --------------------
amended with the written consent of (i) the Company, (ii) Holders of at least a
majority of the outstanding shares of the Registrable Securities, taken together
and (iii) Holders of at least a majority of the outstanding Registrable
Securities issued or issuable with respect to the Series C Preferred, Series D
Preferred, Series E Preferred and Series F Preferred, taken together; provided,
however, that (i) any amendment of Section 3.4(c) shall also require the written
consent of holders of at least a majority of the Registrable Securities issued
or issuable with respect to the Series E Preferred; (ii) any amendment of
Section 2.3 shall also require the written consent of holders of at least sixty-
six and two-thirds percent (66 2/3%) of the Series F Registrable Securities; and
(iii) any amendment that would have an adverse effect on any Holder that is
different from or disproportionate to the effect of such amendment on the other
Holders may not be made without the written consent of the Holder that would be
so differently or disproportionately affected thereby.  Any amendment or waiver
effected in accordance with this paragraph shall be binding upon each Holder of
Registrable Securities and the Company.

          4.8  Effect of Amendment or Waiver.    Investors and their respective
               -----------------------------
successors and assigns acknowledge that by the operation of Section 4.7 hereof
certain holders of the outstanding Registrable Securities, acting in conjunction
with the Company, will have the right and power to diminish or eliminate all
rights pursuant to this Agreement.

          4.9  Rights of Holders.    Each Holder of Registrable Securities shall
               -----------------
have the absolute right to exercise or refrain from exercising any right or
rights that such Holder may have by reason of this Agreement, including, without
limitation, the right to consent to the waiver or modification of any obligation
under this Agreement, and such Holder shall not incur any liability to any other
holder of any securities of the Company as a result of exercising or refraining
from exercising any such right or rights.

          4.10 Delays or Omissions.  No delay or omission to exercise any
               -------------------
right, power or remedy accruing to any party to this Agreement, upon any breach
or default of the other party, shall impair any such right, power or remedy of
such non-breaching party nor shall it be construed to be a waiver of any such
breach or default, or an acquiescence therein, or of or in any similar breach or
default thereafter occurring; nor shall any waiver of any single breach or
default be deemed a waiver of any other breach or default theretofore or
thereafter occurring.  Any waiver, permit, consent or approval of any kind or
character on the part of any party of any breach or default under this
Agreement, or any waiver on the part of any party of any provisions or
conditions of this Agreement, must be made in writing and shall be effective
only to the extent specifically set forth in such writing.  All remedies, either
under this Agreement, or by law or otherwise afforded to any Holder, shall be
cumulative and not alternative.

          4.11 Attorneys' Fees.    If any action at law or in equity is
               ---------------
necessary to enforce or interpret the terms of this Agreement, the prevailing
party shall be entitled to reasonable attorney's

                                      22
<PAGE>

fees, costs and necessary disbursements in addition to any other relief to which
such party may be entitled.

          4.12  Aggregation of Stock.    All shares of Registrable Securities
                --------------------
held or acquired by affiliated entities or persons shall be aggregated together
for the purpose of determining the availability of any rights under this
Agreement.

                                      23
<PAGE>

     IN WITNESS WHEREOF, the parties hereto have executed this Fifth Amended and
Restated Rights Agreement as of the day and year first above written.

COMPANY:

WAVESPLITTER TECHNOLOGIES, INC.

By:-------------------------------
   William H. Diamond, President and
   Chief Executive Officer

SERIES F INVESTORS:

By:         ________________________

Print Name: ________________________

Title:      ________________________

PRIOR INVESTORS:

---------------------------
(Printed Name)

By:------------------------

Title:---------------------

               SIGNATURE PAGE FOR WAVESPLITTER TECHNOLOGIES, INC.
                  FIFTH AMENDED AND RESTATED RIGHTS AGREEMENT

                                      24<PAGE>
                                                                     EXHIBIT 4.3

THIS WARRANT AND THE SHARES ISSUABLE HEREUNDER HAVE NOT BEEN REGISTERED UNDER
THE SECURITIES ACT OF 1933, AS AMENDED .AND MAY NOT BE SOLD, PLEDGED, OR
OTHERWISE TRANSFERRED WITHOUT AN EFFECTIVE REGISTRATION THEREOF UNDER SUCH ACT
OR PURSUANT TO RULE 144 OR AN OPINION OF COUNSEL REASONABLY SATISFACTORY TO THE
CORPORATION AND ITS COUNSEL, THAT SUCH REGISTRATION IS NOT REQUIRED.

                           WARRANT TO PURCHASE STOCK

Corporation:                APPLIED FIBER OPTICS INC., a California corporation
Number of Shares:           20,000
Class of Stock:             Series B Preferred
Initial Exercise Price:     $1.25 per Share
Issue Date:                 December 24, 1997
Expiration Date:            December 24, 2002 (subject to Section 4.1)

     THIS WARRANT CERTIFIES THAT, for the agreed upon value of $1.00 and for
other good and valuable consideration, GBC VENTURE CAPITAL, INC. ("Holder") is
entitled to purchase the number of fully paid and nonassessable shares of the
class of securities (the "Shares") of the corporation (the "Company") at the
initial exercise price per Share (the "Warrant Price") all as set forth above
and as adjusted pursuant to Articles 1 and 2 of this Warrant, subject to the
provisions and upon the terms and conditions set forth of this Warrant.

ARTICLE 1.    EXERCISE.

          1.1  Method of Exercise.  Holder may exercise this Warrant by
delivering a duly executed Notice of Exercise in substantially the form attached
as Appendix 1 to the principal office of the Company. Unless Holder is
exercising the conversion right set forth in Section 1.2, Holder shall also
deliver to the Company a check for the aggregate Warrant Price for the Shares
being purchased.

          1.2  Conversion Right.  In lieu of exercising this Warrant as
specified in Section 1.1, Holder may from time to time convert this Warrant, in
whole or in part, into a number of Shares determined by dividing (a) the
aggregate fair market value of the Shares or other securities otherwise issuable
upon exercise of this Warrant minus the aggregate Warrant Price of such Shares
by (b) the fair market value of one Share. The fair market value of the Shares
shall be determined pursuant Section 1.3.

          1.3  Fair Market Value.  If the Shares are traded in a public market,
the fair market value of the Shares shall be the closing price of the Shares (or
the closing price of the Company's Stock into which the Shares are convertible)
reported for the business day immediately before Holder delivers its Notice of
Exercise to the Company. If the Shares are not traded in a public market, the
Board of Directors of the Company shall determine fair market value in its
reasonable good faith judgment. If the conversion right set forth in Section 1.2
above is being exercised in connection with an Acquisition (as defined below)
the fair market value per Share shall equal the consideration per share that
would be paid to Holder by the acquiring entity

                                       1
<PAGE>

pursuant to Section 1.6.3 hereof had this Warrant been exercised immediately
prior to such Acquisition. The foregoing notwithstanding, if Holder advises the
Board of Directors in writing that Holder disagrees with such determination,
then the Company and Holder shall promptly agree upon a reputable investment
banking firm to undertake such valuation, in which case the fair market value
for purposes of this Section 1.3 shall be that determined by such investment
banking firm. If the valuation of such investment banking firm is more than ten
percent (10%) greater than that determined by the Board of Directors, then all
fees and expenses of such investment banking firm shall be paid by the Company.
In all other circumstances, such fees and expenses shall be paid by Holder.

          1.4  Delivery of Certificate and New Warrant. Promptly after Holder
exercises or converts this Warrant, the Company shall deliver to Holder
certificates for the Shares acquired and, if this Warrant has not been fully
exercised or converted and has not expired, a new Warrant representing the
Shares not so acquired.

          1.5  Replacement of Warrants.  On receipt of evidence reasonably
satisfactory to the Company of the loss, theft, destruction or mutilation of
this Warrant and, in the case of loss, theft or destruction, on delivery of an
indemnity agreement reasonably satisfactory in form and amount to the Company
or, in the case of mutilation, or surrender and cancellation of this Warrant,
the Company at its expense shall execute and deliver, in lieu of this Warrant, a
new warrant of like tenor.

          1.6  Repurchase on Sale, Merger, or Consolidation of the Company.

          1.6.1  "Acquisition".  For the purpose of this Warrant, "Acquisition"
means any sale, license, or other disposition of all or substantially all of the
assets of the Company, or any reorganization, consolidation, or merger of the
Company where the holders of the Company's securities before the transaction
beneficially own less than 50% of the outstanding voting securities of the
surviving entity after the transaction.

          1.6.2  Assumption of Warrant.  If upon the closing of any Acquisition
the successor assumes the obligations of this Warrant, then this Warrant shall
be exercisable for the same securities, cash, and property as would be payable
for the Shares issuable upon exercise of the unexercised portion of this Warrant
as if such Shares were outstanding on the record date for the Acquisition and
subsequent closing.  The Warrant Price shall be adjusted accordingly.

          1.6.3  Nonassumption.  If upon the closing of any Acquisition the
successor entity does not assume the obligations of this Warrant and Holder has
not otherwise exercised this Warrant in full, then the unexercised portion of
this Warrant shall be deemed to have been automatically converted pursuant to
Section 1.2 and thereafter Holder shall participate in the acquisition on the
same terms as other holders of the same class of securities of this Company.

ARTICLE 2. ADJUSTMENTS TO THE SHARES.

          2.1  Stock Dividends, Splits. Etc.  If the Company declares or pays a
dividend on its common stock (or the Shares if the Shares are securities other
than common stock) payable in common stock, or other securities, subdivides the
outstanding common stock into a greater

                                       2
<PAGE>

amount of common stock, or, if the Shares are securities other than common
stock, subdivides the Shares in a transaction that increases the amount of
common stock into which the Shares are convertible, then upon exercise of this
Warrant, for each Share acquired, Holder shall receive, without cost to Holder,
the total number and kind of securities to which Holder would have been entitled
had Holder owned the Shares of record as of the date the dividend or subdivision
occurred.

          2.2  Reclassification, Exchange or Substitution.  Upon any
reclassification, exchange, substitution, or other event that results in a
change of the number and/or class of the securities issuable upon exercise or
conversion of this Warrant, Holder shall be entitled to receive, upon exercise
or conversion of this Warrant, the number and kind of securities and property
that Holder would have received for the Shares if this Warrant had been
exercised immediately before such reclassification, exchange, substitution, or
other event. Such an event shall include any automatic conversion of the
outstanding or issuable securities of the Company of the same class or series as
the Shares to common stock pursuant to the terms of the Company's Amended and
Restated Articles of Incorporation upon the closing of a registered public
offering of the Company's common stock. The Company or its successor shall
promptly issue to Holder a new Warrant for such new securities or other
property. The new Warrant shall provide for adjustments which shall be as nearly
equivalent as may be practicable to the adjustments provided for in this Article
2 including, without limitation, adjustments to the Warrant Price and to the
number of securities or property issuable upon exercise of the new Warrant. The
provisions of this Section 2.2 shall similarly apply to successive
reclassifications, exchanges, substitutions, or other events.

          2.3  Adjustments for Combinations, Etc.  If the outstanding Shares are
combined or consolidated, by reclassification or otherwise, into a lesser number
of shares, the Warrant Price shall be proportionately increased.

          2.4  Adjustments for Diluting Issuances.  The Warrant Price and the
number of Shares issuable upon exercise of this Warrant or, if the Shares are
Preferred Stock, the number of shares of common stock issuable upon conversion
of the Shares, shall be subject to adjustment, from time to time in the manner
set forth on Exhibit A hereto.

          2.5  No Impairment.  The Company shall not, by amendment of its
Amended and Restated Articles of Incorporation or through a reorganization,
transfer of assets, consolidation, merger, dissolution, issue, or sale of
securities or any other voluntary action, avoid or seek to avoid the observance
or performance of any of the terms to be observed or performed under this
Warrant by the Company, but shall at all times in good faith assist in carrying
out of all the provisions of this Article 2 and in taking all such action as may
be necessary or appropriate to protect Holder's rights under this Section
against impairment.

          2.6  Fractional Shares.  No fractional Shares shall be issuable upon
exercise or conversion of the Warrant and the number of Shares to be issued
shall be rounded down to the nearest whole Share. If a fractional share interest
arises upon any exercise or conversion of the Warrant, the Company shall
eliminate such fractional share interest by paying Holder amount computed by
multiplying the factional interest by the fair market value of a full Share.

                                       3
<PAGE>

          2.7  Certificate as to Adjustments.  Upon each adjustment of the
Warrant Price, the Company at its expense shall promptly compute such
adjustment, and furnish Holder with a certificate of its Chief Financial Officer
setting forth such adjustment and the facts upon which such adjustment is based.
The Company shall, upon written request, furnish Holder a certificate setting
forth the Warrant Price in effect upon the date thereof and the series of
adjustments leading to such Warrant Price.

ARTICLE 3. REPRESENTATIONS AND COVENANTS OF THE COMPANY.

          3.1  Representations and Warranties. The Company hereby represents and
warrants to the Holder as follows:

               (a)  The initial Warrant Price referenced on the first page of
this Warrant is not greater than the fair market value of the Shares as of the
date of this Warrant.

               (b)  All Shares which may be issued upon the exercise of the
purchase right represented by this Warrant, and all securities, if any, issuable
upon conversion of the Shares, shall, upon issuance, be duly authorized, validly
issued, fully paid and nonassessable, and free of any liens and encumbrances
except for restrictions on transfer provided for herein or under applicable
federal and state securities laws.

          3.2  Reservation of Shares.  The Company covenants and agrees that
within thirty (30) days of the date of this Warrant it will cause to be
authorized and reserved, and at all times thereafter it will have authorized and
reserved, a sufficient number of the Shares (and the securities, including
Common Stock, issuable, directly or indirectly, upon conversion of the Shares)
to provide for the exercise of the rights represented by this Warrant.

          3.3  Notice of Certain Events.  If the Company proposes at any time
(a) to declare any dividend or distribution upon its common stock, whether in
cash, property, stock, or other securities and whether or not a regular cash
dividend; (b) to offer for subscription pro rata to the holders of any class or
series of its stock any additional shares of stock of any class or series or
other rights; (c) to effect any reclassification or recapitalization of common
stock; (d) to merge or consolidate with or into any other corporation, or sell,
lease, license, or convey all or substantially all of its assets, or to
liquidate, dissolve or wind up; or (e) offer holders of registration rights the
opportunity to participate in an underwritten public offering of the company's
securities for cash, then, in connection with each such event, the Company shall
give Holder (1) at least 20 days prior written notice of the date on which a
record will be taken for such dividend, distribution, or subscription rights
(and specifying the date on which the holders of common stock will be entitled
thereto) or for determining rights to vote, if any, in respect of the matters
referred to in (c) and (d) above: (2) in the case of the matters referred to in
(c) and (d) above at least 20 days prior written notice of the date when the
same will take place (and specifying the date on which the holders of common
stock will be entitled to exchange their common stock for securities or other
property deliverable upon the occurrence of such event); and (3) in the case of
the matter referred to in (e) above, the same notice as is given to the holders
of such registration rights.

                                       4
<PAGE>

          3.4  Information Rights.  So long as the Holder holds this Warrant
and/or any of the Shares, the Company shall deliver to the Holder (a) promptly
after mailing, copies of all notices or other written communications to the
shareholders of the Company, generally, (b) within one hundred twenty (120) days
after the end of each fiscal year of the Company, the annual audited financial
statements of the Company certified by independent public accountants of
recognized standing and (c) within forty-five (45) days after the end of each of
the first three quarters of each fiscal year, the Company's quarterly, unaudited
financial statements.

          3.5  Investor Rights.  The Company agrees that the Shares or, if the
Shares are convertible into common stock of the Company, such common stock,
shall be subject to the registration rights and such other rights as are set
forth on Exhibit B hereto.

          3.6  Conversion Ratio.  The Company covenants and agrees that the
conversion ratio of the Series B Preferred Stock as converted to Common Stock of
the Company is currently no less than one common share for each share of Series
B Preferred Stock.

ARTICLE 4. MISCELLANEOUS.

          4.1  Term; Notice of Expiration.  This Warrant is exercisable, in
whole or in part, at any time and from time to time on or before the Expiration
Date set forth above. To the extent this Warrant is not previously exercised,
and if the fair market value of one Share is greater than the Warrant Price then
in effect, this Warrant shall be deemed automatically exercised pursuant to
Section 1.2 above (even if not surrendered) immediately before its expiration.
For purposes of such automatic exercise, the fair market value of one Share
shall be determined pursuant to Section 1.3 above. To the extent this Warrant or
any portion thereof is deemed automatically exercised pursuant to this Section
4.1, the Company agrees to promptly notify the holder hereof of the number of
Shares, if any, the holder hereof is to receive by reason of such automatic
exercise.

          4.2  Legends.  This Warrant and the Shares (and the securities
issuable, directly or indirectly, upon conversion of the Shares, if any) shall
be imprinted with a legend in substantially the following form:

THIS SECURITY HAS NOT BEEN REGISTERED UNDER THE SECURITIES ACT OF 1933, AS
AMENDED, AND MAY NOT BE SOLD, PLEDGED OR OTHERWISE TRANSFERRED WITHOUT AN
EFFECTIVE REGISTRATION THEREOF UNDER SUCH ACT OR PURSUANT TO RULE 144 OR AN
OPINION OF COUNSEL REASONABLY SATISFACTORY TO THE CORPORATION AND ITS COUNSEL
THAT SUCH REGISTRATION IS NOT REQUIRED.

          4.3  Compliance with Securities Laws on Transfer.  This Warrant and
the Shares issuable upon exercise this Warrant (and the securities issuable,
directly or indirectly, upon conversion of the Shares, if any) may not be
transferred or assigned in whole or in part without compliance with applicable
federal and state securities laws by the transferor and the transferee
(including, without limitation, the delivery of investment representation
letters and legal opinions reasonably satisfactory to the Company, as reasonably
requested by the Company). The Company shall not require Holder to provide an
opinion of counsel if the

                                       5
<PAGE>

transfer is to an affiliate of Holder or if there is no material question as to
the availability of current information as referenced in Rule 144(c), Holder
represents that it has complied with Rule 144(d) and (e) in reasonable detail,
the selling broker represents that it has complied with Rule 144(f), and the
Company is provided with a copy of Holder's notice of proposed sale.

          4.4  Transfer Procedure. Subject to the provisions of Section 4.3,
Holder may transfer all or part of this Warrant or the Shares issuable upon
exercise of this Warrant (or the securities issuable, directly or indirectly,
upon conversion of the Shares, if any) by giving the Company notice of the
portion of the Warrant being transferred setting forth the name, address and
taxpayer identification number of the transferee and surrendering this Warrant
to the Company for reissuance to the transferee(s) (and Holder if applicable);
provided, however, that (a) the rights under Section 3.4 (b) and (c) hereof
shall be assignable only to an affiliate of Holder being a transferee of the
entire warrant, and (b) the rights under Section 3.5 shall be assignable in
accordance with the First Amended and Restated Rights Agreement, dated as of
October 20, 1997, or to an affiliate of the original Holder or to a transferee
of the entire warrant. Unless the Company is filing financial information with
the SEC pursuant to the Securities Exchange Act of 1934, the Company shall have
the right to refuse to transfer any portion of this Warrant to any person who
directly competes with the Company.

          4.5  Notices.  All notices and other communications from the Company
to the Holder, or vice versa, shall be deemed delivered and effective when given
personally or mailed by first-class registered or certified mail, postage
prepaid, at such address as may have been furnished to the Company or the
Holder, as the case may be, in writing by the Company or such holder from time
to time.

          4.6  Waiver.  This Warrant and any term hereof may be changed, waived,
discharged or terminated only by an instrument in writing signed by the party
against which enforcement of such change, waiver, discharge or termination is
sought.

          4.7  Attorneys Fees.  In the event of any dispute between the parties
concerning the terms and provisions of this Warrant, the party prevailing in
such dispute shall be entitled to collect from the other party all costs
incurred in such dispute, including reasonable attorneys' fees.

                                       6
<PAGE>

          4.8  Governing Law.  This Warrant shall be governed by and construed
in accordance with the laws of the State of California, without giving effect to
its principles regarding conflicts of law.

                             APPLIED FIBER OPTICS INC.

                             By:  /s/ Sheau-Sheng Chen
                                 -------------------------------------------
                             Name:     Sheau-Sheng Chen
                                   -------------------------------------------
                                     (Print)
                             Title: Chairman of the Board, President or Vice
                                    President

                             By:  /s/ Robert Cochran
                                 -------------------------------------------
                             Name:     Robert Cochran
                                   -------------------------------------------
                                     (Print)
                             Title:  Chief Financial Officer, Secretary,
                                     Assistant Treasurer and Assistant Secretary

                                       7

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