(19)

(11)

EP 2 664 037 A1

(12)

(43) Date of publication: 20.11.2013 Bulletin 2013/47 (21) Application number: 11855776.8 (22) Date of filing: 13.01.2011

(51) International Patent Classification (IPC):  H01S 3/13(2006.01) H01S 5/024(2006.01) H01S 3/04(2006.01) (86) International application number: PCT/US2011/021086 (87) International publication number: WO 2012/096664 (19.07.2012 Gazette 2012/29)

(84) Designated Contracting States: AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR (71) Applicant: IPG Photonics Corporation Oxford, Massachusetts 01540 (US)	(72) Inventors: BARANNIKOV, Yuri, A. Oxford, MA 01540 (US) AVDORKHIN, Alexey Oxford, MA 01540 (US) (74) Representative: Kohlmann, Kai  Donatusstrasse 1 52078 Aachen 52078 Aachen (DE)