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9 January 2020 Optimization of second-harmonic generation in large-aperture KDP crystals using multipoint support mounting configurations
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Abstract

A potassium dihydrogen phosphate (KDP) crystal is set to be a vital factor in inertial confinement fusion (ICF). This paper focuses on how to reduce the gravitational distortion and increase the second-harmonic generation (SHG) efficiency of the KDP crystal. Multipoint support mounting configurations are proposed. Their influence on distortion and SHG efficiency is analyzed. Mechanical and optical models are established, and the distortion of the KDP crystal is calculated using the finite-element methods. In addition, phase mismatch caused by distortion and SHG efficiency is calculated and analyzed. The numerical results reveal that multipoint support is a suitable mounting configuration as it has little distortion and increases SHG efficiency. Multipoint support mounting configuration is well applied in the ICF facility.

© 2020 Society of Photo-Optical Instrumentation Engineers (SPIE) 0091-3286/2020/$28.00 © 2020 SPIE
Guoqing Pei, Lang Ye, Weifeng Du, Han Yan, and Xu Xu "Optimization of second-harmonic generation in large-aperture KDP crystals using multipoint support mounting configurations," Optical Engineering 59(1), 016104 (9 January 2020). https://doi.org/10.1117/1.OE.59.1.016104
Received: 24 October 2019; Accepted: 23 December 2019; Published: 9 January 2020
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