We report the efficient Q-switching and Mode Locking regime applying acousto-optic cell in double role as an active Q-switch and mode locker. The acousto-optic Q-switch with 40.7 MHz radio-frequency was located near flat output coupler of Z-type cavity. In the opposite side the Nd:YVO4 rod end pumped by 20-W diode bar with beam shaper was deployed. The QML pulses with envelope durations of 100-150 ns and near 100% modulation depth were observed for wide range of pump powers and repetition rates. 3 W of output average power, 130 pJ of the envelope energy having approximately 5-8 mode locked pulses were achieved.

© 2006 Optical Society of America

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