title: CW 50W/M2 = 10.9 diode laser source by spectral beam combining based on a transmission grating.
abstract: An external cavity structure based on the -1st transmission grating is introduced to spectral beam combining a 970 nm diode laser bar. A CW output power of 50.8 W, an electro-optical conversion efficiency of 45%, a spectral beam combining efficiency of 90.2% and a holistic M(2) value of 10.9 are achieved. This shows a way for a diode laser source with several KW power and diffraction-limited beam quality at the same time.
authors.affiliation: State Key laboratory of Luminescence and Application, Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun 130033, China.
authors.forename: Jun
authors.initials: J
authors.lastname: Zhang
authors.forename: Hangyu
authors.initials: H
authors.lastname: Peng
authors.forename: Xihong
authors.initials: X
authors.lastname: Fu
authors.forename: Yun
authors.initials: Y
authors.lastname: Liu
authors.forename: Li
authors.initials: L
authors.lastname: Qin
authors.forename: Guoqing
authors.initials: G
authors.lastname: Miao
authors.forename: Lijun
authors.initials: L
authors.lastname: Wang
mesh_terms: D004867:Equipment Design; D019544:Equipment Failure Analysis; D054023:Lasers, Semiconductor; D012031:Refractometry / Q000295:instrumentation*