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EX-31.1 - EXHIBIT 31.1 - COHERENT INCa2201697zex-31_1.htm

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Exhibit 31.2


CERTIFICATION OF CHIEF FINANCIAL OFFICER PURSUANT TO
EXCHANGE ACT RULE 13a-14(a)

I, Helene Simonet, certify that:

1.
I have reviewed this Annual Report on Form 10-K/A of Coherent, Inc.;

2.
Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

    Date: January 31, 2011

    By:   /s/ HELENE SIMONET

Helene Simonet
Executive Vice President and Chief Financial Officer



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CERTIFICATION OF CHIEF FINANCIAL OFFICER PURSUANT TO EXCHANGE ACT RULE 13a-14(a)