0000950135-06-007527 S-8 3 20061220 20061220 20061220 IPG PHOTONICS CORP 0001111928 3674 043444218 DE S-8 33 333-139509 061289098 50 OLD WEBSTER ROAD OXFORD MA 01540 5083731100 50 OLD WEBSTER ROAD OXFORD MA 01540 S-8 1 b63452ipsv8.htm IPG PHOTONICS CORPORATION EX-5.1 2 b63452ipexv5w1.htm EX-5.1 OPINION OF WINSTON & STRAWN LLP EX-23.1 3 b63452ipexv23w1.htm EX-23.1 CONSENT OF DELOITTE & TOUCHE LLP