Influence of model characteristic parameters on thermal effect analysis of solid-state laser

Shuzhen Nie; Tianzhuo Zhao; Hong Xiao; Shenghai Zhao

doi:10.1117/12.2586740

2 December 2020 Influence of model characteristic parameters on thermal effect analysis of solid-state laser

Shuzhen Nie, Tianzhuo Zhao, Hong Xiao, Shenghai Zhao

Proceedings Volume 11717, 24th National Laser Conference & Fifteenth National Conference on Laser Technology and Optoelectronics; 117171H (2020) https://doi.org/10.1117/12.2586740
Event: 24th National Laser Conference & Fifteenth National Conference on Laser Technology and Optoelectronics, 2020, Shanghai, China

Abstract

At present, the finite element method is often used to analyze the thermal effect of laser medium in solid-state lasers. By calculating the temperature field distribution, further research on thermal lens, thermally induced depolarization and other thermal effects can be carried out. In the thermal analysis model of laser medium based on heat conduction equation, the definition and selection of characteristic parameters have an important influence on the calculation results. Due to the difference and diversity in the definition and selection of characteristic parameters, this paper focuses on the definition of heat source in the model, gives the expression of heat source under different spatial distribution of pump light, analyzes definition of conversion coefficient of pump energy into heat deposition in crystal, and limits the range in boundary conditions. Taking the thin disk laser medium as an example, the influence of the model parameters on the calculation results is analyzed and the accuracy of the model is verified compared with the test results.

Citation Download Citation

Shuzhen Nie, Tianzhuo Zhao, Hong Xiao, and Shenghai Zhao "Influence of model characteristic parameters on thermal effect analysis of solid-state laser", Proc. SPIE 11717, 24th National Laser Conference & Fifteenth National Conference on Laser Technology and Optoelectronics, 117171H (2 December 2020); https://doi.org/10.1117/12.2586740

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