Volume 13 Issue 4
Aug.  2020
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Chinese Optics  > 2020  >  13(4): 884-898.
SONG Ji-kun, LI Yuan-yang, CHE Dong-bo, GUO Jin, WANG Ting-feng, LI Zhi-lai. Influence of turbulent atmosphere on the effect of coherent beam combining[J]. Chinese Optics, 2020, 13(4): 884-898. doi: 10.37188/CO.2019-0197
Citation: SONG Ji-kun, LI Yuan-yang, CHE Dong-bo, GUO Jin, WANG Ting-feng, LI Zhi-lai. Influence of turbulent atmosphere on the effect of coherent beam combining[J]. Chinese Optics, 2020, 13(4): 884-898. doi: 10.37188/CO.2019-0197
shu

Influence of turbulent atmosphere on the effect of coherent beam combining

  • 1.

    State Key Laboratory of Laser Interaction with Matter, Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun 130033, China;

  • 2.

    University of Chinese Academy of Sciences, Beijing 100049, China

  • 3.

    Space Optical Department Ⅱ, Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun 130033, China

Funds:  Supported by National Key R&D Program of China (No. 2016YFB0500100); National Natural Science Foundation of China (No. 61805234); Fund of the State Key Laboratory of Laser Interaction with Matter (No. SKLLIM1704); Key Research Program of Frontier Sciences, CAS(No. QYZDB-SSW-SLH014); Civil Aerospace Pre-research Project (No. D040101)
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  • Author Bio:

    SONG Ji-kun (1992—), male, born in Heze County, Shandong Province. He is a doctoral candidate. In 2015, he obtained his bachelor's degree from Shandong Jianzhu University. He is mainly engaged in the research of beam transmission and control. E-mail: song_jk@126.com

    WANG Ting-feng (1977—), male, born in Wendeng City, Shandong Province. He is a doctor, researcher and doctoral supervisor. He obtained his bachelor's degree from former Jilin University of Technology in 1999, master's degree from Jilin University in 2002, and doctor's degree from Changchun Institute of Optics, Fine Mechanics and Physics, CAS in 2005. He is mainly engaged in the research of laser application and photoelectricity. E-mail: wangtingfeng@ciomp.ac.cn

  • Corresponding author: wangtingfeng@ciomp.ac.cn
  • Received Date: 08 Oct 2019
  • Rev Recd Date: 09 Nov 2019
  • Publish Date: 01 Aug 2020
    Abstract
  • Coherent beam combining is a promising technology for achieving a high-power laser beam with good beam quality. However, turbulent atmosphere is one of the key factors that restrict its application and development. This paper focuses on the influence of atmospheric Greenwood frequency on the correction effect of the coherent combination system based on Stochastic Parallel Gradient Descent (SPGD) algorithm. At first, the influence of different turbulence intensities on the correction effect of coherent combination systems is analyzed by numerical simulation under static atmospheric conditions. Then, a set of rotating phase screens that meet Kolmogorov’s statistical law are generated by numerical calculation to simulate the turbulent atmosphere and study the correction effect of coherent combination system at different atmospheric Greenwood frequencies. Finally, an experimental platform is established to demonstrate the coherent combination effect of two laser beams. The simulated and experimental results show that when the system's control algorithm iteration frequency (350 Hz) is constant, the disturbance of turbulent atmosphere to the phase and light intensity of laser beams will increase with atmospheric Greenwood frequency, making the effect of coherent combination worse.

     

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