Study on the efficiency improvement of side-pumped all-solid-state ultraviolet lasers

Zhengji Lin; Yuanyuan Fan; Jin Peng; Yingjie Zhu; Qian Wang; Mi Zhou; Yan Qi; Boxia Yan; Yanwei Wang; Zhe Han; Yu Wang

doi:10.1117/12.3007839

24 November 2023 Study on the efficiency improvement of side-pumped all-solid-state ultraviolet lasers

Zhengji Lin, Yuanyuan Fan, Jin Peng, Yingjie Zhu, Qian Wang, Mi Zhou, Yan Qi, Boxia Yan, Yanwei Wang, Zhe Han, Yu Wang

Proceedings Volume 12935, Fourteenth International Conference on Information Optics and Photonics (CIOP 2023); 129353V (2023) https://doi.org/10.1117/12.3007839
Event: Fourteenth International Conference on Information Optics and Photonics (CIOP 2023), 2023, Xi’an, China

Abstract

The thermal focal length of the side-pumped module was first measured at different pump currents, revealing a relationship between thermal focal length and pump current. Then, a linear resonant cavity was designed and optimized. A 1064 nm pulsed laser was generated by using LD side-pumped Nd:YAG laser and acousto-optic(AO) Q-switching technology. BBO and LBO crystals were utilized for second-harmonic generation (SHG) and sum-frequency generation (SFG), respectively. At a repetition rate of 8 kHz, the maximum average power of the 355 nm ultraviolet (UV) output reached 2.13 W, with a pulse width of 32.7 ns. The optical-to-optical conversion efficiency from 1064 nm to 355 nm was 24.3%. At last an analysis was conducted on the impact of the 1064nm to 532 nm photon number ratio's impact on SFG, and the optimal power ratio is close to 1:2 for achieving high conversion efficiency of 355 nm laser output.

(2023) Published by SPIE. Downloading of the abstract is permitted for personal use only.

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Zhengji Lin, Yuanyuan Fan, Jin Peng, Yingjie Zhu, Qian Wang, Mi Zhou, Yan Qi, Boxia Yan, Yanwei Wang, Zhe Han, and Yu Wang "Study on the efficiency improvement of side-pumped all-solid-state ultraviolet lasers", Proc. SPIE 12935, Fourteenth International Conference on Information Optics and Photonics (CIOP 2023), 129353V (24 November 2023); https://doi.org/10.1117/12.3007839

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KEYWORDS

Crystals

Second harmonic generation

Ultraviolet radiation

Sum frequency generation

Mirrors

Nd:YAG lasers

Nonlinear crystals

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