Continuous-wave Nd:YVO _4/KTiOPO _4green laser at 542 nm under diode pumping into the emitting level

摘要

We report a green laser at 542 nm generation by intracavity frequency doubling of a continuous wave (CW) laser operation of a 1086 nm Nd:YVO _4 laser under 880 nm diode pumping into the emitting level ~4F _(3/2). A KTiOPO _4 (KTP) crystal, cut for critical type I phase matching at room temperature is used for second harmonic generation of the laser. At an incident pump power of 14.5 W, as high as 1.33 W of CW output power at 542 nm is achieved. The optical-to-optical conversion efficiency is up to 9.2%, and the fluctuation of the green output power was better than 3.8% in the given 30 min.