Chinese Journal of Lasers, Volume. 48, Issue 17, 1705003(2021)

Single Exposure Beam Quality Analysis Technique with Binary Amplitude Modulation

Siyuan He1,2,3, Xingchen Pan1,2、*, Cheng Liu1,2, and Jianqiang Zhu1,2
Author Affiliations
  • 1Key Laboratory of High Power Laser and Physics, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, China
  • 2National Laboratory on High Power Laser and Physics, China Academy of Engineering Physics, Chinese Academy of Sciences, Shanghai 201800, China
  • 3University of Chinese Academy of Sciences, Beijing 100049, China
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    Figures & Tables(8)
    Basic optical path diagram of CAMI algorithm
    Flow chart of wavefront reconstruction algorithm
    Simulation experiment. (a) Amplitude and phase of the incident wave on the modulation board; (b) unsaturated diffraction spot pattern, the upper right corner is the pixel curve at the dashed line; (c) intensity map of the modulation plate; (d) amplitude and phase of the incident wave reconstructed by CAMI; (e) diffraction spot pattern after saturation treatment, the upper right corner is the enlarged view of the central area, the lower right corner is the pixel curve at the dashed line; (f) reconstructed diffraction spot pattern, the lower right corner is the pixel curve at the dashed line
    Reconstructed results. (a) Intensity of wavefront on plane x-z; (b)--(f) beam amplitude diagram on plane x-y at -20, -10, 0, 10, 20 mm away from modulation plate
    Measurement of the He-Ne laser. (a) Amplitude plate distribution ; (b) diffraction shot recorded experimentally; (c) wavefront distribution of amplitude plate;(d) reconstructed illumination amplitude of amplitude plate
    Pulsed light measurement experiment. (a) Measurement optical path of CAMI; (b) single diffraction shot recorded experimentally; (c) recovered diffraction spot pattern;(d) reconstructed illumination amplitude of amplitude plate; (e) reconstructed illumination phase of amplitude plate
    Reconstruction results. (a)--(e)Reconstructed incident wave amplitude results on plane x-y at -100, -50, 0, 50, 100 mm away from modulation plate; (f)--(h) x-y plane, x-z plane, y-z plane Gaussian wave reconstruction results
    • Table 1. Laser quality evaluation parameter

      View table

      Table 1. Laser quality evaluation parameter

      ParameterHorizontalVertical
      M21.47461.2101
      ω/μm239.3227.2
      L0/μm3.63×1053.57×105
      θ/mrad2.82.4
      Z0/mm86.995.5
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    Siyuan He, Xingchen Pan, Cheng Liu, Jianqiang Zhu. Single Exposure Beam Quality Analysis Technique with Binary Amplitude Modulation[J]. Chinese Journal of Lasers, 2021, 48(17): 1705003

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    Paper Information

    Category: Beam transmission and control

    Received: Feb. 2, 2021

    Accepted: Mar. 9, 2021

    Published Online: Sep. 1, 2021

    The Author Email: Pan Xingchen (xchpan@siom.ac.cn)

    DOI:10.3788/CJL202148.1705003

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