Compact, and efficient continues wave intra-cavity frequency doubling Nd:YVO4/MgO:PPLN 542/543 nm green lasers

Efficient, compact and low cost 542/543 nm green DPSS lasers were proposed and demonstrated. Each laser was based on a Nd:YVO4 crystal and a MgO:PPLN crystal. By aligning the z-axis of the MgO:PPLN crystal to σ- and π-direction of the Nd:YVO4 crystal, the laser can emit green wavelengths at 542 nm and 543 nm, respectively. An optical-to-optical (O-O) efficiency as high as 22% was achieved for the 542 nm green laser, and the maximum O-O efficiency of the 543 nm laser was 35%. To the best of our knowledge, both results are the highest O-O efficiency achieved so far for Nd:YVO4 542 nm and 543 nm green lasers. The long-term power stability of the 542 nm and 543 nm lasers were 0.46%, and 0.19%, respectively.