0001111928-08-000136 8-K 1 20080925 8.01 20080925 20080925 IPG PHOTONICS CORP 0001111928 3674 043444218 DE 8-K 34 001-33155 081088901 50 OLD WEBSTER ROAD OXFORD MA 01540 5083731100 50 OLD WEBSTER ROAD OXFORD MA 01540 8-K 1 form8-k.htm IPG PHOTONICS CORPORATION FORM 8-K 9-25-08