All-solid-state intracavity frequency-doubled Nd:Y0.36Gd0.64VO4-GdCa4O(BO3)3 green laser under direct 880 nm pumping

We report a green laser at 532 nm generation by intracavity frequency doubling of a continuous wave (CW) laser operation of a 1064 nm Nd:Y 0.36 Gd 0.64 VO 4 laser under in-band diode pumping at 880 nm. An GdCa 4 O(BO 3 ) 3 (GdCOB) 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 17.8 W, as high as 2.92 W of CW output power at 532 nm is achieved. The optical-to-optical conversion efficiency is up to 16.4%, and the fluctuation of the green output power was better than 2.5% in the given 30 min.