Continuous-wave simultaneous dual-wavelength operation at 912 nm and 1063 nm in Nd : GdVO4

A continuous-wave, diode-pumped Nd:GdVO4 thin disk laser with simultaneous dual-wavelength emission at the 912 nm F-4 (3/2)-> I-4 (9/2) quasi-three level transition and the 1063 nm F-4(3/2) -> I-4(11/2) four-level transition is demonstrated and analyzed. Output powers of 1.7 W at 912 nm and of 1.6 W at 1063 nm were achieved simultaneously from a 0.3-at.%, 300-mu m thick Nd:GdVO4 crystal that was multi-pass excited with 26.8 W of available diode pump power. Second harmonic generation to 456 nm with LiB3O5 yielded 0.96 W in 912 nm single-wavelength operation and 0.73 W in 912 nm/1063 nm dual-wavelength operation.