Efficient cw and passively Q-switched operation with self-stimulated Raman scattering conversion was demonstrated in a compact diode-pumped Yb:KLu(WO4)2 laser. A cw output power of 3.28 W was obtained with an optical efficiency of 48.2% and a slope efficiency of 78.2% with respect to the incident pump power. Stable Q-switched operation was achieved with a Cr4+:YAG saturable absorber, generating 32.4 µJ fundamental pulses with a duration of 1.41 ns at 1030.6 nm and 14.4 µJ Raman pulses with a duration of 0.71 ns at 1137.6 nm. At an incident pump power of 7.0 W, the average output power reached 0.9 and 0.4 W for fundamental and Raman radiation, with slope efficiencies of 32.1% and 14.1%, respectively.
© 2005 Optical Society of America
(140.3480) Lasers and laser optics : Lasers, diode-pumped
(140.3540) Lasers and laser optics : Lasers, Q-switched
(140.3550) Lasers and laser optics : Lasers, Raman
(140.5680) Lasers and laser optics : Rare earth and transition metal solid-state lasers
Junhai Liu, Uwe Griebner, Valentin Petrov, Huaijin Zhang, Jianxiu Zhang, and Jiyang Wang, "Efficient continuous-wave and Q-switched operation of a diode-pumped Yb:KLu(WO4)2 laser with self-Raman conversion," Opt. Lett. 30, 2427-2429 (2005)