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Performance improvement method for large aperture frequency conversion crystal
Author(s): Zheng Zhang; Weifeng Du; Dongya Chu; Lang Ye; Hai Zhou; Hui Wang
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Paper Abstract

In huge-scale high peak power laser facility, the frequency conversion unit is responsible for the conversion of fundamental infrared wave at 1053nm into ultraviolet wave at 351nm. In this paper, the mechanism of service performance degradation of frequency doubling crystal is revealed by combining field experiments and numerical simulations. Moreover, we propose a flexure support method that can effectively reduce crystal surface distortion. Further, an experiment platform for offline mounting of frequency conversion crystal is built, and the mechanical and optical characteristics are verified by the experimental results. Finally, online verification is carried out in China’s high peak power laser facility. The results show that the proposed mounting method can significantly modify the crystal surface figure, improve its online performance and increase the highest efficient output power of high peak power laser facility.

Paper Details

Date Published: 17 May 2019
PDF: 5 pages
Proc. SPIE 11170, 14th National Conference on Laser Technology and Optoelectronics (LTO 2019), 111700G (17 May 2019); doi: 10.1117/12.2532040
Show Author Affiliations
Zheng Zhang, Tsinghua Univ. (China)
Weifeng Du, Research Ctr. of Laser Fusion (China)
Dongya Chu, Tsinghua Univ. (China)
Lang Ye, Research Ctr. of Laser Fusion (China)
Hai Zhou, Research Ctr. of Laser Fusion (China)
Hui Wang, Tsinghua Univ. (China)


Published in SPIE Proceedings Vol. 11170:
14th National Conference on Laser Technology and Optoelectronics (LTO 2019)
Jianqiang Zhu; Weibiao Chen; Zhenxi Zhang; Minlin Zhong; Pu Wang; Jianrong Qiu, Editor(s)

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