High Power Laser Science and Engineering, 2017, 5 (4): 04000e31, Published Online: Nov. 21, 2018
302 W triple-frequency, single-mode, linearly polarized Yb-doped all-fiber amplifier
Abstract
Stimulated Brillouin scattering (SBS) effect is currently the major limitation for the power scaling of single-frequency/narrow linewidth fiber laser systems. A single-mode linearly polarized all-fiber amplifier system is set up to investigate SBS effect in triple-frequency high-power amplifiers. With this amplifier, up to 302 W output power with 83% slope efficiency is achieved and the SBS threshold is scaled up to 12 dB. To the best of our knowledge, this is the highest output power of multifrequency laser from a single-mode polarization maintaining fiber. Good spectral properties and high brightness make this laser source available for the application of second harmonic generation, coherent beam combining.
Xiang Zhao, Yifeng Yang, Hui Shen, Xiaolong Chen, Gang Bai, Jingpu Zhang, Yunfeng Qi, Bing He, Jun Zhou. 302 W triple-frequency, single-mode, linearly polarized Yb-doped all-fiber amplifier[J]. High Power Laser Science and Engineering, 2017, 5(4): 04000e31.