Scaling the spectral beam combining channel by multiple diode laser stacks in an external cavity. (6th March 2017)

• Record Type: Journal Article
• Authors: Meng, Huicheng; Ruan, Xu; Du, Weichuan; Wang, Zhao; Lei, Fuchuan; Yu, Junhong; Tan, Hao
• Is Part Of: Laser physics letters. Volume 14:Number 4(2017:Apr.)
• Publication Date: 2017-03-06
• Subjects: diode laser arrays -- laser beam combining -- diffraction gratings -- laser resonators; Lasers -- Periodicals; Physics -- Periodicals; 621.366
• DOI: 10.1088/1612-202X/aa5f99
• Languages: English
• ISSNs: 1612-2011

Abstract

Abstract: Spectral beam combining of a broad area diode laser is a promising technique for direct diode laser applications. We present an experimental study of three mini-bar stacks in an external cavity on spectral beam combining in conjunction with spatial beam combining. At the pump current of 70 A, a CW output power of 579 W, spectral bandwidth of 18.8 nm and electro-optical conversion efficiency of 47% are achieved. The measured M 2 values of spectral beam combining are 18.4 and 14.7 for the fast and the slow axis, respectively. The brightness of the spectral beam combining output is 232 MW · cm −2 · sr −1 .