Wavelength-variable low-noise all-solid-state yellow-green laser based on BP-frequency selection and BC-filtering

A continuous wave (CW) Watt-level wavelength-variable low-noise all-solid-state yellow-green laser was developed by using the Brewster polarizer frequency selection and birefringent crystal filtering methods. The maximum CW output power of the yellow-green laser beams radiating at wavelengths of 556.32 nm, 558.36 nm and 561.63 nm was measured to be 2.922 W, 2.713 W and 2.514 W, respectively. When the CW output power was 2.5 W within 4 h, the power instability of the three yellow-green laser beams from the shortest wavelength to longest wavelength was +/- 0.55%, +/- 0.46%, and +/- 0.69%, respectively. Their corresponding laser noise was 0.65%, 0.48%, and 0.72%. To the best of our knowledge, the Watt-level wavelength-variable all-solid-state yellow-green laser with low noise proposed in this study is the first of its kind.