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Proceedings Paper

Evaluation of thermally-induced lens of a pentagonal-side-pumped solid-state laser rod
Author(s): Jiawei Guo; Feng Yang; Xiaoxu Liu; Juhong Han; Kepeng Rong; Guofei An; He Cai; Hongyuan Wang; You Wang
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Paper Abstract

LD-side-pumping schemes for a solid-state laser offer the advantages of both high pump efficiency and high output power. However, thermally-induced lens has been known to severely affect the performance of high-powered solid-state lasers. To solve the problem, a systematic simulation model was developed by combining two procedures of ray tracing and finite element method (FEM) together to explore the thermal lens characteristics of a high-powered Nd:YAG laser. The relationship between the spatial heat density distribution and thermally-induced refractive index distribution was investigated by taking an inhomogeneous pentagonal pumping into account. The influence of a pentagonal pumping on the characteristics of the thermal lens focal length of a laser rod was studied afterwards. According to the results, if the volume average heat density of a laser rod is kept as a constant, the focal lengths of a thermally-induced lens in the pentagonal pumped laser rods will be shorter than those of the homogeneously pumped laser rods with different rod diameters. It has also been demonstrated that the focal lengths of both pumping cases are not sensitive to the variation of the rod diameter. The study is thought to be helpful for the design of a high-powered solid-state laser.

Paper Details

Date Published: 12 March 2020
PDF: 13 pages
Proc. SPIE 11437, 2019 International Conference on Optical Instruments and Technology: Advanced Laser Technology and Applications, 114370E (12 March 2020); doi: 10.1117/12.2543845
Show Author Affiliations
Jiawei Guo, Southwest Institute of Technical Physics (China)
Feng Yang, Southwest Institute of Technical Physics (China)
Sichuan Univ. (China)
Xiaoxu Liu, Southwest Institute of Technical Physics (China)
Juhong Han, Southwest Institute of Technical Physics (China)
Kepeng Rong, Southwest Institute of Technical Physics (China)
Guofei An, Southwest Institute of Technical Physics (China)
He Cai, Southwest Institute of Technical Physics (China)
Hongyuan Wang, Southwest Institute of Technical Physics (China)
You Wang, Southwest Institute of Technical Physics (China)


Published in SPIE Proceedings Vol. 11437:
2019 International Conference on Optical Instruments and Technology: Advanced Laser Technology and Applications
Zhiyi Wei; Chunqing Gao; Pu Wang; Franz X, Kärtner; Stefan A. Weber, Editor(s)

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