3 kW polarization maintained fiber lasers with 10.6 GHz linewidth and near diffraction limited beam quality

Qiuhui Chu; Qiang Shu; Chao Guo; Haoyu Zhang; Rumao Tao; Honghuan Lin; Jianjun Wang

doi:10.1117/12.2671818

21 March 2023 3 kW polarization maintained fiber lasers with 10.6 GHz linewidth and near diffraction limited beam quality

Qiuhui Chu, Qiang Shu, Chao Guo, Haoyu Zhang, Rumao Tao, Honghuan Lin, Jianjun Wang

Author Affiliations +

Proceedings Volume 12595, Advanced Fiber Laser Conference (AFL2022); 125952G (2023) https://doi.org/10.1117/12.2671818
Event: Advanced Fiber Laser Conference (AFL2022), 2022, Changsha, China

Abstract

In this work, a high-power polarization-maintained fiber laser with ultra-narrow linewidth and near diffraction limited beam quality is demonstrated. The stimulated Brillouin scattering is mitigated by optimizing phase modulation scheme, the mode instability is suppressed by coiling the active fiber, and the output power reaches to 3kW at the full width at half-maximum linewidth of 10.6GHz. At maximum output power, the stimulated Raman scattering suppression ratio reaches to 75dB, the polarization extinction ratio is 96%, the beam quality M² is 1.156, and the further scaling of output power is limited by stimulated Brillouin scattering effect. To the best of our knowledge, this is the highest power for polarization-maintained fiber laser with about 10GHz linewidth ever reported so far.

Citation Download Citation

Qiuhui Chu, Qiang Shu, Chao Guo, Haoyu Zhang, Rumao Tao, Honghuan Lin, and Jianjun Wang "3 kW polarization maintained fiber lasers with 10.6 GHz linewidth and near diffraction limited beam quality", Proc. SPIE 12595, Advanced Fiber Laser Conference (AFL2022), 125952G (21 March 2023); https://doi.org/10.1117/12.2671818

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