YAG saturable uv absorbers

A diode-pumped Q-switched and mode-locked (QML) Nd:LuVO4/KTP green laser with acousto-optic modulator (AOM) and Cr4+:YAG saturable UV Absorber is presented. By inserting an AOM into the laser cavity, the stability of the QML green laser pulse with AO and Cr4+:YAG is improved, the modulation depth is increased and the pulse width of Q-switched pulse envelope is significantly compressed in comparison with that of the singly passively QML green laser with Cr4+:YAG. The experimental results show that the peak power of the doubly QML green laser pulse is much higher than that of the singly passively QML green laser pulse.