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  • Received: Aug. 22, 2019

    Accepted: Oct. 9, 2019

    Posted: Dec. 1, 2019

    Published Online: Dec. 2, 2019

    The Author Email: Sun Yinhong (

    DOI: 10.3788/CJL201946.1215001

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    Yanshan Wang, Yi Ma, Yinhong Sun, Jue Wang, Zhe Chang, Wanjing Peng, Xiaobo Yang, Rihong Zhu, Kai Zhang, Chun Tang. 2.62-kW, 30-GHz Linearly Polarized All-Fiber Laser with Narrow Linewidth and Near-Diffraction-Limit Beam Quality[J]. Chinese Journal of Lasers, 2019, 46(12): 1215001

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Chinese Journal of Lasers, Vol. 46, Issue 12, 1215001 (2019)

2.62-kW, 30-GHz Linearly Polarized All-Fiber Laser with Narrow Linewidth and Near-Diffraction-Limit Beam Quality

Wang Yanshan1,2,3,4, Ma Yi1,3, Sun Yinhong1,3,*, Wang Jue1,3, Chang Zhe1,3,4, Peng Wanjing1,3, Yang Xiaobo1,3, Zhu Rihong2, Zhang Kai1,3, and Tang Chun1,3

Author Affiliations

  • 1Institute of Applied Electronics, China Academy of Engineering Physics (CAEP), Mianyang, Sichuan 621900, China
  • 2Key Laboratory of Advanced Solid Laser, Ministry of Industry and Information Technology,Nanjing University of Science and Technology, Nanjing, Jiangsu 210094, China
  • 3Key Laboratory of Science and Technology on High Energy Laser, CAEP, Mianyang, Sichuan 621900, China
  • 4Graduate School of CAEP, Beijing 100088, China


We demonstrate a high-power, linearly polarized all-fiber amplifier with a narrow linewidth and near-diffraction-limit beam quality by suppressing the stimulated Brillouin scattering and self-pulsing effects simultaneously. The maximum laser power is 2.62 kW with 86.7% optical-optical efficiency. Beam quality (M2), polarization extinction ratio (PER), and linewidth are well maintained during power amplification with M2<1.3, PER ~96.3%, a 3 dB linewidth of 32 GHz, and a 20 dB second-order moment linewidth of 30 GHz. To the best of our knowledge, this is the largest demonstration of an all-fiber laser with narrow linewidth, linear polarization, and beam quality near the diffraction limit.


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