Optics and Precision Engineering, Volume. 31, Issue 9, 1347(2023)

Mounting optimization on large aperture KDP crystal to minimize assembling deformation

Xusong QUAN1... Weifeng DU1, Dongya CHU1,2, Hai ZHOU1,* and Lang YE1 |Show fewer author(s)
Author Affiliations
  • 1Research Center of Laser Fusion, China Academy of Engineering Physics, Mianyang62900, China
  • 2Mechanical Department, Tsinghua University, Beijing100084, China
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    In the high-power laser facility, control of the surface deformation of the large-aperture KDP crystal is the key factor to reduce the frequency-conversion efficiency. To improve the assembling quality of the KDP crystal, a point-supporting process method is proposed for minimizing the assembly deformation. First, a genetic algorithm is used to optimize the support points and their distribution scheme. Second, the finite-element method is used to optimize the assembling preload. Finally, mounting optimization design process experiments are conducted to evaluate the surface deformation and the frequency-doubling conversion efficiency. The experimental results indicate that the proposed method is effective for minimizing the assembling deformation of the KDP crystal; the measured PV value is 6.51 μm, and the measured conversion efficiency of second-harmonic generation reaches 72.6% with excellent assembling repeatability. This result significantly improves the frequency-doubling efficiency and the quality of the far-field spot and has been widely used and promoted in engineering.

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    Xusong QUAN, Weifeng DU, Dongya CHU, Hai ZHOU, Lang YE. Mounting optimization on large aperture KDP crystal to minimize assembling deformation[J]. Optics and Precision Engineering, 2023, 31(9): 1347

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    Paper Information

    Category: Micro/Nano Technology and Fine Mechanics

    Received: Nov. 4, 2022

    Accepted: --

    Published Online: Jun. 6, 2023

    The Author Email: ZHOU Hai (a697097@163.com)

    DOI:10.37188/OPE.20233109.1347

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