Thermal analysis and experimental study of end-pumped continuous-wave thulium-doped laser

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• 作者：Chunting Wu^a ; ^c ; ^{bigsnow1@126.com" class="auth_mail" title="E-mail the corresponding author} ; Fei Chen^b ; Tongyu Dai^c ; Youlun Ju^c
• 关键词：Diode-pumped lasers ; Tm ; LuAG ; Thermal lensing
• 刊名：Optik - International Journal for Light and Electron Optics
• 出版年：2016
• 出版时间：March 2016
• 年：2016
• 卷：127
• 期：5
• 页码：3086-3090
• 全文大小：770 K

文摘

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.