0000950123-09-058842 10-Q 4 20090930 20091106 20091106 IPG PHOTONICS CORP 0001111928 3674 043444218 DE 10-Q 34 001-33155 091162802 50 OLD WEBSTER ROAD OXFORD MA 01540 5083731100 50 OLD WEBSTER ROAD OXFORD MA 01540 10-Q 1 b77453e10vq.htm IPG PHOTONICS CORPROATION EX-31.1 2 b77453exv31w1.htm EX-31.1 SECTION 302 CERTIFICATION OF CHIEF EXECUTIVE OFFICER EX-31.2 3 b77453exv31w2.htm EX-31.2 SECTION 302 CERTIFICATION OF CHIEF FINANCIAL OFFICER EX-32 4 b77453exv32.htm EX-32 SECTION 906 CERTIFICATION OF CHIEF EXECUTIVE OFFICER AND CHIEF FINANCIAL OFFICER