Thermal Analysis of HO : CaF2 Crystal Pumped by 1.9 μm Laser Diode

IF 0.7 4区物理与天体物理 Q4 OPTICS

Journal of Russian Laser Research Pub Date : 2023-07-13 DOI:10.1007/s10946-023-10136-8

Huanhuan Min, Xiaohu Han, Lulu Gao, Xuejun Zhai, Guanghua Liu, Ruijun Lan, Yingjie Shen

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Abstract

In this paper, we establish a three-dimensional heat conduction and thermal stress model of a bulk crystal. Based on planar strain assumption of solid-state lasers, we study the thermal conduction and thermal stress of the bulk Ho : CaF₂ laser-medium end-pumped by the Gaussian beam. We establish a thermal model of the plate crystal with complex boundary conditions and discuss the effect of pump energy and pump beam waist radius on the thermal performance of Ho : CaF₂ crystals in details. Out results show that, as the pump power increases, the thermal effect of Ho :CaF₂ crystal increased with the decrease of the pump-spot radius, and the thermal effect of the crystal increases with increase in the pump power. Furthermore, the absolute value of the shear stress of crystals is far smaller than the absolute value of the corresponding normal stress, and the absolute values of the normal stress and shear stress of small size crystals are greater than those of large size crystals.

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1.9 μm激光二极管泵浦HO: CaF2晶体的热分析

本文建立了块体晶体的三维热传导和热应力模型。基于固体激光器的平面应变假设，研究了高斯光束泵浦的体Ho: CaF2激光介质端的热传导和热应力。建立了具有复杂边界条件的平板晶体热模型，详细讨论了泵浦能量和泵浦束腰半径对Ho: CaF2晶体热性能的影响。结果表明，随着泵浦功率的增大，Ho:CaF2晶体的热效应随着泵浦点半径的减小而增大，晶体的热效应随着泵浦功率的增大而增大。此外，晶体的剪应力绝对值远小于相应的法向应力绝对值，并且小尺寸晶体的法向应力和剪应力绝对值大于大尺寸晶体。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Journal of Russian Laser Research 物理-光学

CiteScore

1.50

自引率

22.20%

发文量

审稿时长

2 months

期刊介绍： The journal publishes original, high-quality articles that follow new developments in all areas of laser research, including: laser physics; laser interaction with matter; properties of laser beams; laser thermonuclear fusion; laser chemistry; quantum and nonlinear optics; optoelectronics; solid state, gas, liquid, chemical, and semiconductor lasers.