High Efficient LD-pumped Nd∶YVO4/ LBO Red Laser

A design of high efficient LD-pumped Nd∶YVO4/LBO red laser was reported in this paper. For the first time, type-I critical phase-matched LBO was used for 1.342 μm intracavity frequency-doubling to obtain 671 nm red laser. With 760 mW incident pump power, 78 mW TEM00 mode red laser output was obtained, the optical-to-optical conversion up to 10%. Measurements showed the beam divergent angle less than 0.5 mrad, polarization degree more than 100∶1 and power instability in 48 hours less than ±2%.