By using a continuous-wave Ti:sapphire laser as a pumping source, we demonstrated a passively <i>Q</i>-switched Yb:YAG laser at room temperature with Cr<sup>4+</sup>:YAG as the saturable absorber. We achieved an average output power of as much as 55 mW at 1.03 μm with a pulse width (FWHM) as short as 350 ns. The initial transmission of the Cr<sup>4+</sup>:YAG has an effect on the pulse duration (FWHM) and the repetition rate of the Yb:YAG passively <i>Q</i>-switched laser. The Yb:YAG crystal can be a most promising passively <i>Q</i>-switched laser crystal for compact, efficient, solid-state lasers.
© 2001 Optical Society of America
(140.3540) Lasers and laser optics : Lasers, Q-switched
(140.3580) Lasers and laser optics : Lasers, solid-state
(140.5680) Lasers and laser optics : Rare earth and transition metal solid-state lasers
Jun Dong, Peizhen Deng, Yupu Liu, Yinghua Zhang, Jun Xu, Wei Chen, and Xinglong Xie, "Passively Q-Switched Yb:YAG Laser with Cr4+:YAG as the Saturable Absorber," Appl. Opt. 40, 4303-4307 (2001)