• Chinese Optics Letters
  • Vol. 19, Issue 9, 091401 (2021)
Renchong Lü1、2, Hao Teng2、5、*, Jiangfeng Zhu1、**, Yang Yu1、2, Wei Liu4, Guoqing Chang2, and Zhiyi Wei2、3、5、***
Author Affiliations
  • 1School of Physics and Optoelectronic Engineering, Xidian University, Xi’an 710071, China
  • 2Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
  • 3School of Physical Science, University of Chinese Academy of Sciences, Beijing 100049, China
  • 4School of Physics and Astronomy, Sun Yat-sen University, Zhuhai 519082, China
  • 5Songshan Lake Materials Laboratory, Dongguan 523808, China
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    Abstract

    We report a high power fiber amplifier based on nonlinear chirped-pulse amplification (NCPA). To manage the nonlinearity, pulse shaping is introduced by self-phase modulation in the fiber stretcher with the help of spectral filtering. The third-order dispersion is compensated for by the nonlinear phase shift in the NCPA. With optimization, the system can output 382 fs pulse duration with 20 W average power at 1 MHz repetition rate. The long-term average power fluctuation is measured to be 0.5% in 24 h, and the beam quality factor (M2) is 1.25.
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    Renchong Lü, Hao Teng, Jiangfeng Zhu, Yang Yu, Wei Liu, Guoqing Chang, Zhiyi Wei. High power Yb-fiber laser amplifier based on nonlinear chirped-pulse amplification at a repetition rate of 1 MHz[J]. Chinese Optics Letters, 2021, 19(9): 091401
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    Category: Lasers, Optical Amplifiers, and Laser Optics
    Received: Dec. 30, 2020
    Accepted: Feb. 26, 2021
    Posted: May. 27, 2021
    Published Online: Jun. 2, 2021
    The Author Email: Hao Teng (hteng@iphy.ac.cn), Jiangfeng Zhu (jfzhu@xidian.edu.cn), Zhiyi Wei (zywei@iphy.ac.cn)