Abstract

In this paper, we demonstrate a high-power, narrow-linewidth, polarization-maintaining fiber amplifier with near-diffraction-limited beam quality. By optimizing the phase modulation signal, a nearly top-hat-shaped spectrum was generated for self-pulsing suppressing. That results in doubling the self-pulsing threshold we got from conventional white noise signal phase modulation with the same optical linewidth. Based on an optimized signal and a high power, polarization-maintaining, counter-pumped fiber amplifier, we obtain a 3.25 kW narrow-linewidth linearly polarized laser output with a linewidth of ${\sim}{20}\;{\rm GHz}$, the polarization extinction ratio is about 15 dB, and the ${M^2}$ is less than 1.22 at the maximum output power. To the best of our knowledge, this is the first demonstration of a narrow-linewidth, linear polarization, all-fiber amplifier with 3.25 kW laser output.

© 2021 Optical Society of America

560  W all fiber and polarization-maintaining amplifier with narrow linewidth and near-diffraction-limited beam quality

Yang Ran, Rumao Tao, Pengfei Ma, Xiaolin Wang, Rongtao Su, Pu Zhou, and Lei Si
Appl. Opt. 54(24) 7258-7263 (2015)

1.5 kW polarization-maintained Yb-doped amplifier with 13 GHz linewidth by suppressing the self-pulsing and stimulated Brillouin scattering

Zhe Chang, Yanshan Wang, Yinhong Sun, Wanjing Peng, Weiwei Ke, Yi Ma, Rihong Zhu, and Chun Tang
Appl. Opt. 58(23) 6419-6425 (2019)

1.89 kW all-fiberized and polarization-maintained amplifiers with narrow linewidth and near-diffraction-limited beam quality

Pengfei Ma, Rumao Tao, Rongtao Su, Xiaolin Wang, Pu Zhou, and Zejin Liu
Opt. Express 24(4) 4187-4195 (2016)

kW-level 1030  nm polarization-maintained fiber laser with narrow linewidth and near-diffraction-limited beam quality

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)

3.05 kW, 13.7 GHz linewidth fiber amplifier based on PRBS phase modulation for SBS suppression

Wei Xie, Yifeng Yang, He Wang, Kaiyuan Wang, Xinyu Duan, Kai Liu, Xiaolong Chen, Xiaoqiang Xiong, Dawei Zhang, and Junqing Meng
Appl. Opt. 63(12) 2994-3002 (2024)