Intracavity sum-frequency mixing with LBO in 593 nm laser

An LD-end-pumped Nd:YVO_4 crystal 593 nm yellow laser by intracavity sum-frequency mixing (SFM) is reported. With one plane-curved cavity dual-wavelength operation, 1 064 nm and 1 342 nm, is realized. By LBO Intracavity SFM 593 nm laser is attained. With 1.4 W pump power 70 mW output power at 593 nm was observed. The far field divergence angle of 593 nm is less than 1 mrad and the ellipticity of the output beam is 0.999. Low-noise characteristic has been proved at the same time. The experiment show that this is the useful method to obtain solid state yellow laser with diffraction limit.