Abstract
We report a diode-pumped CW Tm:YLF laser at room temperature with a volume Bragg grating (VBG) instead of the conventional mirror. The Tm:YLF laser operated at 1909.5 nm with output power 6.0 W. The optical-to-optical conversion efficiency is 25.7% and slope efficiency is 37.4%. Also, a stable output and a narrow linewidth less than 0.3 nm FWHM are achieved.
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