Abstract This paper has established thermal models for mid-infrared single-ended bonded Tm: LuAG laser crystal based on different crystal topographies and has analyzed the temperature distribution in the crystal under different crystal topographies used COMSOL software. The thermal stress distribution in the crystal under different morphology, the thermal stress distribution at different locations, the volumetric strain of the crystals under the thermal stress and the temperature distribution have been analyzed. Experimental verification has been carried out. With the increase of the pumping power, the bonded slab crystal had larger output power, but the lower pump power it can withstand. The threshold power, output power, and slope efficiency of bonded rod-shape crystals were similar to those of bonded block crystals. This article has been provided an effective theoretical support for choosing the cutting morphology of single-ended bonded Tm: LuAG crystal, which can provide better output performance.

中文翻译：

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中红外单端键合Tm LuAG激光晶体的热效应研究

摘要 本文建立了基于不同晶体形貌的中红外单端键合Tm:LuAG激光晶体的热模型，并利用COMSOL软件分析了不同晶体形貌下晶体内的温度分布。分析了不同形貌下晶体内的热应力分布、不同位置的热应力分布、热应力作用下晶体的体积应变和温度分布。已经进行了实验验证。随着泵浦功率的增加，粘结板晶具有较大的输出功率，但可承受的泵浦功率较低。键合棒状晶体的阈值功率、输出功率和斜率效率与键合块状晶体相似。