Diode-pumped Yb:GSO-LBO laser at 544 nm

We report a green laser at 544 nm generation by intracavity frequency doubling of a continuous wave (CW) laser operation of a 1088 nm Yb:GSO laser under in-band diode pumping at 940 nm. An LiB₃O₅ (LBO) 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 444 mW of CW output power at 544 nm is achieved. The fluctuation of the green output power was better than 4.6% in the given 4 h.