Laser-diode pumped Nd:GdVO_4 ultraviolet laser with LBO frequency tripling

摘要

We have demonstrated a laser-diode pumped Nd:GdVO4 extra-cavity frequency tripling ultraviolet laser with a LBO crystal in this paper.Under the acousto-optic （A-O） Q-switched operation,we have obtained 355 nm ultraviolet laser,with pulse width of 25 ns and pulse repetition rate of 20 kHz.By using a type Ⅰ non-critical phase-matched LBO crystal,the SHG output power of 822 mW is achieved at the incident pump power of 16 W. The output power of 355nm UV laser is 260mW with a type Ⅱ phase-matched LBO crystal,and the conversion efficiency （1 064 nm-355 nm ） is 5.9 %.The power stability of 355 nm laser is 1.7% in 1 h.