Abstract
A high-power Tm:YAG ceramic slab laser is reported. Deliberate thermal management was made to dissipate the heat effectively and release the stress in ceramics. The influence of pump wavelength on laser performance was investigated. A maximum of 52 W output power was achieved, corresponding to a slope efficiency of 27.8 % with respect to the incident pump power. As to our knowledge, this is the highest 2-μm laser output power reported in Tm:YAG ceramic lasers. This result proves that Tm:YAG laser ceramic is a promising candidate for 2-μm high-power laser applications.
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