Abstract
Abstract This paper focused on the analysis of thermal effect of Tm:LuAG crystal and its lasing characteristics under continuous-wave (CW) operation at room temperature. The temperature-distribution of Tm:LuAG rod was shown intuitively by using a software of COMSOL. The thermal focal length was calculated which was useful to design the resonator. In experiment, thermal focal length of Tm:LuAG crystal was measured, firstly. The experimental results were coinciding with the theoretical calculations. Then, laser characteristics of CW Tm:LuAG crystal were measured. Maximum output power of 6.34 W was obtained when the pump power was 25.7 W. To our best knowledge, it was the highest output power of CW Tm:LuAG laser. The output wavelength was 2023 nm and the beam quality factor was M2 = 3.8 at the maximum power level.
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