Abstract
We demonstrate 10 kW spectral beam combination of six narrow-linewidth fiber amplifiers by two transmission gratings with a combining efficiency about 90%. The wavelengths of incident beams range from 1056 to 1088 nm. Each fiber amplifier delivers 2 kW output power laser with 0.25 nm root-mean-square (RMS) linewidth. A dual-grating beam-combining system is constructed to combine the six beams into a 10 kW level high-power beam and control the beam quality factor ${{\rm M}^2} \lt {2}$ by dispersion compensation. To the best of our knowledge, this is the highest output power combined by transmission gratings, which verifies the feasibility of transmission grating under high-power density laser radiation and provides an alternative approach for high-power beam combining.
© 2019 Optical Society of America
Full Article | PDF ArticleMore Like This
Junsu Lee, Kwang Hyun Lee, Hwanseong Jeong, Minkyu Park, Ji Hoon Seung, and Jung Hwan Lee
Appl. Opt. 58(23) 6251-6256 (2019)
Fan Chen, Jun Ma, Cong Wei, Rihong Zhu, Wenchao Zhou, Qun Yuan, Shaohua Pan, JianYun Zhang, Yize Wen, and Jiantai Dou
Opt. Express 25(26) 32783-32791 (2017)
Qiuhui Chu, Pengfei Zhao, Honghuan Lin, Yu Liu, Chengyu Li, Bopeng Wang, Chao Guo, Xuan Tang, Chuanxiang Tang, and Feng Jing
Appl. Opt. 57(12) 2992-2996 (2018)