Document:

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                                                                   Exhibit 10.29

[_________], 2002

To the Board of Directors of
Oplink Communications, Inc.

Re:  Stock Option Amendment

Dear Board Member:

     This letter memorializes the amendment ("Amendment"), unanimously approved
by the Board of Directors (the "Board") of Oplink Communications, Inc. (the
"Company") on [________], 2002, to each of the outstanding options held by the
members of the Board to purchase shares of the Company's common stock. As a
result of the Amendment, all of your outstanding Company stock options (your
"Options") shall provide as follows:

     1.   Notwithstanding anything to the contrary in Section 9(b) of the
Company's 1995 Stock Option Plan, Section 9(b) of the Company's 1998 Stock
Option Plan or Section 6(h) of the Company's 2000 Equity Incentive Plan, as
applicable, the exercise period under your Options shall be extended as follows:

          (a)  You shall be entitled to exercise your Options (to the extent
that you were entitled to exercise such option as of the date of your
termination with the Company) until the second anniversary of the date you cease
providing services in any and all capacities to the Company.

          (b)  In the event the Merger (as defined below) with Avanex
Corporation ("Avanex") is effectuated, you shall also be entitled to the
following:

               (i)  Your Options shall be assumed by (or a substitute option
provided by) Avanex;

               (ii) Avanex shall be included within the term "Company" for the
purposes of applying the provisions of your Options. Accordingly, for example,
if you become a director, employee, officer or consultant of Avanex immediately
following the Merger, such service for Avanex shall be included with the term
"Continuous Service" for the purposes of applying the provisions of your Options
granted pursuant to the Company's 2000 Equity Incentive Plan; and

               (iii) Your Options shall remain exercisable until the later of
(X) the date determined in accordance with paragraph (a) above and (Y) the fifth
anniversary of the date of the closing of the Merger.

          (c)  Notwithstanding the foregoing, in no event shall your Options be
exercised after the expiration of the term of each respective Option as set
forth therein. If you do not exercise your Option(s) within the applicable time
period, the Option(s) shall terminate.

                                       1.

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     2.   For purposes of the Amendment, the "Merger" shall be defined as set
forth in that certain Agreement and Plan of Reorganization, dated as of
[______], 2002, by and among Avanex, Pearl Acquisition Corporation and the
Company.

     3.   The Amendment (and your Options) shall be binding on the successors of
the Company, including, without limitation, Avanex following the Merger and any
successor of Avanex following a subsequent acquisition of Avanex however
effectuated. In addition, your Options shall be assumed by (or a substitute
option provided by) any successor company (including for this purpose any
acquiring company) to the Company, or Avanex following the Merger, if any
Company stock option or Avanex stock option held by an employee of the Company
or Avanex is assumed by (or substituted for by) the successor (or acquiring)
company.

     4.   All other provisions of your Options shall remain in effect and are
not modified by the Amendment.

     Please acknowledge your receipt and understanding of this letter, and
acceptance of the described change to your Options, by signing one copy of this
letter and returning it to me. Please keep the enclosed copy of this letter for
your records.

Sincerely,

Bruce Horn
Chief Financial Officer

ACKNOWLEDGED:

Signature:
           ------------------------------------------

Print Name:
           ------------------------------------------

                                       2.<PAGE>

                                                                   EXHIBIT 10.36

                                 PROMISSORY NOTE

$400,000                                                         August __, 2000

     FOR VALUE RECEIVED, the undersigned, FREDERICK R. FROMM, hereby
unconditionally promises to pay to the order of OPLINK COMMUNICATIONS, INC., a
California corporation (the "Company" or "Holder"), at such place as Holder
hereof may designate, in lawful money of the United States of America and in
immediately available funds, the principal sum of $400,000 together with
interest accrued from the date hereof on the unpaid principal at the rate of
6.70% per annum, calculated on the basis of a 365-day year for the actual number
of days elapsed.

     1.   Principal Repayment.

     The outstanding principal amount and any accrued and unpaid interest
hereunder shall be due and payable over a period of four (4) years in two equal
installments due on the second and fourth anniversary of the date hereof;
provided, however, that in the event that the undersigned's employment is
terminated the entire principal balance and all accrued interest shall become
immediately due and payable, and immediately collectible by Holder pursuant to
applicable law.

     2.   Default. If the undersigned fails to pay any of the principal and
accrued interest when due, the Company, at its sole option, shall have the right
to accelerate this Note, in which event the entire principal balance and all
accrued interest shall become immediately due and payable, and immediately
collectible by Holder pursuant to applicable law.

     3.   Prepayment. This Note may be prepaid at any time without penalty. All
money paid toward the satisfaction of this Note shall be applied first to the
payment of interest as required hereunder and then to the retirement of the
principal.

     4.   Full Recourse Note. This note is full recourse, accordingly, Holder
shall be entitled to seek personal judgement against the undersigned in the
event of a default for the full amount of the principal and accrued interest
then outstanding, plus any costs or expenses as provided herein.

     5.   Non-Consumer Debt. The undersigned hereby represents and agrees that
the amounts due under this Note are not consumer debt, and are not incurred
primarily for personal, family or household purposes, but are for business and
commercial purposes only.

     6.   Waiver. The undersigned hereby waives presentment, protest and notice
of protest, demand for payment, notice of dishonor and all other notices or
demands in connection with the delivery, acceptance, performance, default or
endorsement of this Note.

     7.   Expenses; Attorneys' Fees. The Holder hereof shall be entitled to
recover, and the undersigned agrees to pay when incurred, all costs and expenses
of collection of this Note, including without limitation, reasonable attorneys'
fees.

                                       1.

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     8.   Governing Law. This Note shall be governed by, and construed, enforced
and interpreted in accordance with, the laws of the State of California,
excluding conflict of laws principles that would cause the application of laws
of any other jurisdiction.

                                         -------------------------------------
                                         FREDERICK R. FROMM

                                         ACCEPTED AND AGREED TO BY:

                                         OPLINK COMMUNICATIONS, INC.

                                         -------------------------------------
                                         OFFICER'S SIGNATURE

                                         -------------------------------------
                                         NAME OF OFFICER AND TITLE

                                       2.<PAGE>

                                                                   Exhibit 10.37

                                 PROMISSORY NOTE

$3,657,500                                                        April 3, 2001

     FOR VALUE RECEIVED, the undersigned, JOSEPH Y. LIU, hereby unconditionally
promises to pay to the order of OPLINK COMMUNICATIONS, INC., a Delaware
corporation ("Oplink", the "Company" or "Holder"), at such place as Holder
hereof may designate, in lawful money of the United States of America and in
immediately available funds, the principal sum of $3,657,500 together with
simple interest accrued from the date hereof on the unpaid principal at the rate
of 8.00% per annum, calculated on the basis of a 365-day year for the actual
number of days elapsed.

     1.   Principal Repayment. The outstanding principal amount and any accrued
and unpaid interest hereunder shall be due and payable in one lump sum upon the
earlier of (1) a demand by a majority of the Company's Board of Directors at any
time it so elects, or (2) the fifth anniversary of the date hereof; provided,
however, that in the event that the undersigned's employment with the Company is
terminated the entire principal balance and all accrued interest shall become
immediately due and payable, and immediately collectible by Holder pursuant to
applicable law (the "Maturity Date").

     2.   Prepayment. This Note may be prepaid at any time without penalty. All
money paid toward the satisfaction of this Note shall be applied first to the
payment of interest as required hereunder and then to the retirement of the
principal.

     3.   Escrow; Full Recourse Note. This Note is secured by an escrow (the
"Escrow") comprising all of the shares of Oplink common stock covered by the
stock options granted to the undersigned in connection with his employment and
directorship with the Company (the stock option referred to as the "Stock
Options"). As the Stock Options have vested and continue to vest from time to
time, the Oplink shares so vested shall be placed into the Escrow. Any such
shares already purchased shall be pledged by the undersigned, upon the execution
of this Note, in favor of the Holder pursuant to the Stock Pledge Agreement
attached hereto and, if the undersigned elects to purchase any more of the
vested shares, the shares so purchased shall be likewise pledged from time to
time. Should the undersigned wish to sell any of the Oplink stock so purchased
before the Maturity Date, the proceeds realized therefrom shall first be applied
to prepay this Note until it is settled in full. In the event that the
undersigned's employment or directorship with the Company is terminated, should
any principal amount or any accrued and unpaid interest under this Note remain
due and payable, Holder has the right (but not the obligation) to require the
undersigned to sell any or all of the Oplink common stock in the Escrow
immediately and to apply the proceeds realized therefrom to repay this Note
until it is settled in full. The undersigned shall be solely responsible for any
tax consequences to him arising from his optioned shares being so escrowed,
pledged and/or sold, as the case may be. Notwithstanding the foregoing, this
Note is full recourse, accordingly, Holder shall be entitled to seek personal
judgement against the undersigned in the event of a default for the full amount
of the principal and accrued interest then outstanding, plus any costs or
expenses as provided herein.

                                   Page 1 of 2

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     4.   Non-Consumer Debt. The undersigned hereby represents and agrees that
the amounts due under this Note are not consumer debt, and are not incurred
primarily for personal, family or household purposes, but are for business and
commercial purposes only.

     5.   Waiver. The undersigned hereby waives presentment, protest and notice
of protest, demand for payment, notice of dishonor and all other notices or
demands in connection with the delivery, acceptance, performance, default or
endorsement of this Note.

     6.   Expenses; Attorneys' Fees. The Holder hereof shall be entitled to
recover, and the undersigned agrees to pay when incurred, all costs and expenses
of collection of this Note, including without limitation, reasonable attorneys'
fees.

     7.   Governing Law. This Note shall be governed by, and construed, enforced
and interpreted in accordance with, the laws of the State of California,
excluding conflict of laws principles that would cause the application of laws
of any other jurisdiction.

                                /s/ Joseph Y. Liu
                                ------------------------------------------------
                                JOSEPH Y. LIU

                                ACCEPTED BY OPLINK COMMUNICATIONS, INC.:

                                /s/ Ian Jenks
                                ------------------------------------------------
                                IAN JENKS
                                CHAIRMAN OF THE BOARD OF DIRECTORS

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