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18 March 2024 Study on the improvement of ultraviolet damage characteristics of DKDP crystal by dual-wavelength laser conditioning
Yuanpan Chen, Xuezao Ren, Rong Qiu, Lei Zhou, Qiang Zhou, Liqing Zhang, Jinfang Shi, Yang Gao, Zhun Xie, Jianxin Wang
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Proceedings Volume 13104, Advanced Fiber Laser Conference (AFL2023); 131041E (2024) https://doi.org/10.1117/12.3022116
Event: Advanced Fiber Laser Conference (AFL2023), 2023, Shenzhen, China
Abstract
In order to study the influence of dual-wavelength laser conditioning on the ultraviolet damage characteristics of DKDP crystals, 3 ω (355nm) and 1 ω (1064nm) lasers with different energy ratios were used in DKDP crystals laser conditioning simultaneously. In the case of single-wavelength laser conditioning, 3 ω lasers scan DKDP in raster scanning with increasing energy density lower than crystal damage threshold. In the case of dual-wavelength laser conditioning, the DKDP is irradiated by 3 ω and 1 ω at the same time with different fluence ratios. In the same DKDP region, 1 ω fluence is a constant and 3 ω fluence is varied. The damage characteristics of the samples under 3 ω irradiation (evaluated by damage probability curve and damage density) are obtained by 1-on-1 irradiation. The experimental results show that: (1) Compared with the 3 ω conditioning, the dual-wavelength laser conditioning can improve the damage resistance of DKDP crystals with ultraviolet damage significantly; (2) The best laser conditioning performance is obtained with the fluence of 1 ω equaling 8.8 J/cm2 in this paper, here the maximum 3 ω zero probability damage threshold of DKDP crystal is 29.6 J/cm2. (3) Under the simultaneous conditioning of dual-wavelength lasers, 1 ω , which fluence is far below the self-damage threshold, participates in the conditioning process, indicating that there is an energy coupling effect between wavelengths.
(2024) Published by SPIE. Downloading of the abstract is permitted for personal use only.
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Yuanpan Chen, Xuezao Ren, Rong Qiu, Lei Zhou, Qiang Zhou, Liqing Zhang, Jinfang Shi, Yang Gao, Zhun Xie, and Jianxin Wang "Study on the improvement of ultraviolet damage characteristics of DKDP crystal by dual-wavelength laser conditioning", Proc. SPIE 13104, Advanced Fiber Laser Conference (AFL2023), 131041E (18 March 2024); https://doi.org/10.1117/12.3022116
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KEYWORDS
Crystals
Laser crystals
Laser irradiation
Laser damage threshold
Laser energy
Ultraviolet radiation
Crystallography
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