The Ti: sapphire laser pumped Yb: YAG passively- Q-switched laser with Cr~(4+): YAG as asaturable absorber experiment was performed. The Mira 900 tunable Ti: sapphire laser with anoutput power up to 1 W was used as a pump source. The optical pump system w The Ti: sapphire laser pumped Yb: YAG passively-Q-switched laser with Cr ~ (4+): YAG as asurable absorber experiment was performed. The Mira 900 tunable Ti: sapphire laser with an output power up to 1 W was used as a pump source. The optical pump system w