Generating a 2.4-W cw Green Laser by Intra-Cavity Frequency Doubling of a Diode-Pumped Nd:GdVO₄ Laser with a MgO:PPLN Crystal

High-power cw green laser radiation is generated by intra-cavity frequency doubling of a diode-pumped Nd:GdVO₄ laser with a MgO-doped periodically-poled LiNbO₃ (MgO:PPLN) crystal at room temperature. An average power of 2.4 W at 0.53 μm is obtained under the pump 15 W at 808 nm, corresponding to an overall optical-to-optical conversion efficiency of 16%. The M² factor of the green beam is 3.90 and 1.34 for the horizontal and vertical direction, respectively. In addition, the power fluctuation is measured to be about ±5%.