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.
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