EXHIBIT 32.1

                CERTIFICATION OF CHIEF EXECUTIVE OFFICER PURSUANT
                TO SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

I, Jerry S. Rawls, certify, pursuant to 18 U.S.C. Section 1350, as adopted
pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that the Quarterly
Report of Finisar Corporation (the "Company") on Form 10-Q for the period ended
October 31, 2004 (the "Report") fully complies with the requirements of Section
13(a) of the Securities Exchange Act of 1934 and that the information contained
in the Report fairly presents, in all material respects, the financial condition
and results of operations of the Company.

Dated: December 10, 2004                              /s/ Jerry S. Rawls
                                                      --------------------------
                                                      Jerry S. Rawls
                                                      Chief Executive Officer