强激光与粒子束, 2020, 32 (1): 011006, 网络出版: 2020-03-31
基于简单MOPA结构实现3.08 kW全光纤窄线宽线偏振激光输出
Output of 3.08 kW narrow linewidth linearly polarized all-fiber laser based on a simple MOPA structure
全光纤激光器 主振荡功率放大 窄线宽 线偏振 all-fiber laser master oscillator power amplifier narrow linewidth linear polarization
摘要
基于简单的主振荡功率放大结构，演示了一种高功率窄线宽线性偏振全光纤激光器，其最大输出功率为3.08 kW，3 dB线宽为0.2 nm。在整个功率缩放过程中，偏振消光比约为94%，光束质量M2约为1.4。这是国内外首次实现3 kW全保偏光纤激光输出，与基于相位调制的窄线宽激光器相比，该激光器可实现近似的线宽，同时具有受激布里渊散射阈值高、系统结构简单、成本低等特点。
Abstract
We demonstrated a narrow linewidth linearly polarized all-fiber laser operating at maximum output power of 3.08 kW with a 3 dB linewidth of 0.2 nm based on a simple master oscillator power amplifier (MOPA) structure. The polarization extinction ratio (PER) is about 94% and the M2 is about 1.4 along the whole power scaling process. This is the first demonstration of a 3 kW linearly polarized all-fiber laser output. Compared with the narrow linewidth fiber amplifier based on phase modulation, this system can achieve a nearly same linewidth. Meanwhile, it has the characteristics of high stimulated Brillouin scattering (SBS) threshold, simple structure, and low cost, etc.
王岩山, 王珏, 常哲, 彭万敬, 孙殷宏, 马毅, 高清松, 张凯, 唐淳. 基于简单MOPA结构实现3.08 kW全光纤窄线宽线偏振激光输出[J]. 强激光与粒子束, 2020, 32(1): 011006. Yanshan Wang, Jue Wang, Zhe Chang, Wanjing Peng, Yinhong Sun, Yi Ma, Qingsong Gao, Kai Zhang, Chun Tang. Output of 3.08 kW narrow linewidth linearly polarized all-fiber laser based on a simple MOPA structure[J]. High Power Laser and Particle Beams, 2020, 32(1): 011006.
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