Eye-safe laser radiation from stimulated Raman scattering frequency self-conversion in KGd(WO4)2:Nd3+

Under short-pulsed longitudinal pumping at 600 nm we obtained intracavity stimulated Raman scattering frequency self-conversion of the 1352.5 nm laser line in KGd(WO4)2:Nd3+. The wavelength which was produced is eye-safe at 1539.5 nm and the conversion efficiency was 1.26% with uncoated faces of the 3 cm long crystal.