Abstract
The spectroscopic characteristics of Tm:CaYAlO4 crystal were studied. Continuous wave laser operation at 2 μm was achieved with a 6 at.% Tm:CaYAlO4 (Tm:CYA) crystal pumped by a fiber-coupled laser diode. The laser emits a maximum output power of 4.3 W with a slope efficiency as high as 46.7%. In addition, a wavelength tuning experiment on Tm:CYA crystal was performed showing the Tm:CYA laser could be continuously tuned from 1861 to 2046 nm using an intracavity CaF2 prism, suggesting the potential of this crystal for ultrashort pulse generation by mode-locking.
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