550-W Single-Frequency All-Fiber Amplifier with Near-Diffraction-Limited Beam Quality

被引：0

作者：

Lai, Wenchang ^{[1
]}

Ma, Pengfei ^{[1
]}

Liu, Wei ^{[1
]}

Huang, Long ^{[1
]}

Li, Can ^{[1
]}

Zhou, Pu ^{[1
]}

机构：

[1] College of Advanced Interdisciplinary Studies, National University of Defense Technology, Changsha,Hunan,410073, China

来源：

Zhongguo Jiguang/Chinese Journal of Lasers | 2020年 / 47卷 / 04期

关键词：

Stimulated Brillouin scattering;

D O I：

暂无

中图分类号：

学科分类号：

摘要：

In this study, a 550-W single-frequency all-fiber laser with near diffraction-limited beam quality is achieved by simultaneously suppressing the stimulated Brillouin scattering and mode instability effects with a long-tapered gain fiber and employing the ability of high mode instability threshold of 1030-nm signal laser. The slope efficiency of the whole amplifier is observed to be as high as 80% and the measured beam quality M2 is approximately 1.47 at the maximum output power. Further brightness scaling is limited owing to the mode instability effect. © 2020, Chinese Lasers Press. All right reserved.

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