Simultaneous mode locking had been obtained in acousto-optic Q-switched Nd:LuVO 4 laser by using a Z-type cavity. Pulses with great average output power and narrow pulse width were observed in our experiment. The modulation depth is nearly 90% and the width of Q-switched envelope is about 70 ns, and both maintained constant with the increase of pump power. The maximum average output power of 1.83 W was obtained when the incident pump power was 6.78 W and the Q-switched envelop repetition frequency was 30 kHz. Also the average pulse width of the mode locking among the Q-switched envelope is estimated to be about 200 ps.
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Zhang et al. (2009) studied this question.
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