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Infrared and Laser Engineering, Volume. 52, Issue 6, 20220869(2023)

Coherent polarization beam combination of two ultrafast laser channels based on fiber stretcher phase locking

Tao Wang1, Can Li1、*, Yang Liu2, Bo Ren1, Zhenqiang Tang2, Hongxiang Chang1, Gehui Xie2, Kun Guo1, Jian Wu1, Jiangming Xu1, Jinyong Leng1, Pengfei Ma1,3, Rongtao Su1,3, Wenxue Li2, and Pu Zhou1
Author Affiliations
  • 1College of Advanced Interdisciplinary Studies, National University of Defense Technology, Changsha 410073, China
  • 2State Key Laboratory of Precision Spectroscopy, East China Normal University, Shanghai 200062, China
  • 3Nanhu Laser Laboratory, National University of Defense Technology, Changsha 410073, China
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    Experimental setup of two ultrafast laser channels coherent polarization beam combination. CFBG：chirped fiber Bragg grating; Pre-amp: pre-amplifier; HWP: half-wave plate; PBS: polarization beam splitter; QWP: quarter-wave plate; L1-L4: lens; M1-M4, high-reflection mirror; PBC: polarization beam combiner; PD: photodiode; PM: power meter; (b) output spectrum and (c) pulse width of the seed laser

    Fig. 1. Experimental setup of two ultrafast laser channels coherent polarization beam combination. CFBG：chirped fiber Bragg grating; Pre-amp: pre-amplifier; HWP: half-wave plate; PBS: polarization beam splitter; QWP: quarter-wave plate; L1-L4: lens; M1-M4, high-reflection mirror; PBC: polarization beam combiner; PD: photodiode; PM: power meter; (b) output spectrum and (c) pulse width of the seed laser

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    (a) Normalized temporal intensity fluctuation before and after phase locking (open loop and closed loop); (b) Power spectral density curves at the open and closed loop; system combined beam profile in (c) -(e) open loop and (f) closed loop

    Fig. 2. (a) Normalized temporal intensity fluctuation before and after phase locking (open loop and closed loop); (b) Power spectral density curves at the open and closed loop; system combined beam profile in (c) -(e) open loop and (f) closed loop

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    Combining efficiency at different output powers

    Fig. 3. Combining efficiency at different output powers

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    (a) Output spectra and (b) autocorrelation trace of the compressed pulse of single channel and combined beam at the highest power

    Fig. 4. (a) Output spectra and (b) autocorrelation trace of the compressed pulse of single channel and combined beam at the highest power

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    Tao Wang, Can Li, Yang Liu, Bo Ren, Zhenqiang Tang, Hongxiang Chang, Gehui Xie, Kun Guo, Jian Wu, Jiangming Xu, Jinyong Leng, Pengfei Ma, Rongtao Su, Wenxue Li, Pu Zhou. Coherent polarization beam combination of two ultrafast laser channels based on fiber stretcher phase locking[J]. Infrared and Laser Engineering, 2023, 52(6): 20220869

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    Paper Information

    Category: Lasers & Laser optics

    Received: Dec. 4, 2022

    Accepted: --

    Published Online: Jul. 26, 2023

    The Author Email: Li Can (lc0616@163.com)

    DOI:10.3788/IRLA20220869

    Topics

    laser devices and laser physics
    Lasers and Laser Optics
    Laser physics
    laser manufacturing
    Instrumentation, Measurement and Metrology