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Chinese Journal of Lasers, Volume. 51, Issue 22, 2201011(2024)

Analysis of Partially Coherent Beam Smoothing

Ziang Chen1,2, Xiaoqi Zhang1、**, Yanli Zhang1、***, Jianhao Tang1,3, Ruifeng Wang1, and Jianqiang Zhu1、*
Author Affiliations
  • 1National Laboratory on High Power Laser and Physics, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, China
  • 2Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100049, China
  • 3School of Physical Science and Technology, ShanghaiTech University, Shanghai 201210, China
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    AbstractGet PDF(in Chinese)
    Figures&Tables (6)
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    References (25)
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    Figures & Tables(6)
    Incoherent superposition of HG modes

    Fig. 1. Incoherent superposition of HG modes

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    Focal spots of coherent beam and MPCB. (a) Focal spot of coherent beam; (b) focal spot of MPCB (t<tc); (c) focal spot of MPCB (t>tc)

    Fig. 2. Focal spots of coherent beam and MPCB. (a) Focal spot of coherent beam; (b) focal spot of MPCB (t<tc); (c) focal spot of MPCB (t>tc)

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    One-dimensional spatial coherence of MPCB

    Fig. 3. One-dimensional spatial coherence of MPCB

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    CPP distribution

    Fig. 4. CPP distribution

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    Simulation results of focal spots. (a) One-dimensional intensity distribution of focal spots; (b) relationship between N and R90; (c) relationship between N and δRMS; (d) intensity power spectra of focal spots

    Fig. 5. Simulation results of focal spots. (a) One-dimensional intensity distribution of focal spots; (b) relationship between N and R90; (c) relationship between N and δRMS; (d) intensity power spectra of focal spots

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    • Table 1. Comparison of focal spot parameters

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      Table 1. Comparison of focal spot parameters

      ConditionShapingSmoothing
      η /%R90 /μmFOPAI5 /%δRMS1 /%δRMS2 /%
      t>tcMPCB， N=2298.83249.306.455.59
      MPCB， N=2898.74250.105.995.41
      MPCB， N=3498.62251.005.625.20
      MPCB， N=4098.45252.705.244.94
      MPCB， N=4698.27254.405.024.79
      t<tcMPCB， N=2298.84249.38.52‒‒
      MPCB， N=2898.78250.48.61‒‒
      MPCB， N=3498.58251.08.73‒‒
      MPCB， N=4098.44252.78.81‒‒
      MPCB， N=4698.30254.48.89‒‒
      Coherent beam98.99247.64.40‒6.18
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    Ziang Chen, Xiaoqi Zhang, Yanli Zhang, Jianhao Tang, Ruifeng Wang, Jianqiang Zhu. Analysis of Partially Coherent Beam Smoothing[J]. Chinese Journal of Lasers, 2024, 51(22): 2201011

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    Paper Information

    Category: laser devices and laser physics

    Received: Mar. 6, 2024

    Accepted: Apr. 19, 2024

    Published Online: Nov. 15, 2024

    The Author Email: Zhang Xiaoqi (skcheung@siom.ac.cn), Zhang Yanli (zhangyl@siom.ac.cn), Zhu Jianqiang (jqzhu@siom.ac.cn)

    DOI:10.3788/CJL240656

    CSTR:32183.14.CJL240656

    Topics

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