Abstract
Based on the analysis of laser threshold of quasi-three-level laser system and the parameters optimization of resonant cavity, a compact setup of 457nm blue-ray laser system is designed, and the laser operation at 914nm and its second harmonic at 457nm was obtained by intracavity frequency doubling with LBO nonlinear crystal. At an incident pump power of 24.3W, the maximum output power at 457nm is 2.34W the optical-to-optical conversion efficiency is greater than 9.74%, and the fluctuation of the blue output power is less than 3.01%, besides, laser threshold of this laser system is 3.7W which is the lowest at present.
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