Optics and Precision Engineering, Volume. 31, Issue 9, 1347(2023)
Mounting optimization on large aperture KDP crystal to minimize assembling deformation
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
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)