Abstract
We have demonstrated an efficient and compact passively Q-switched and mode-locked (QML) 1064nm Nd:YVO4 laser by using a low temperature grown GaAs (LT-GaAs) saturable absorber as well as an output coupler. Stable QML with envelope duration as short as 10ns and Q-switched repetition rate of 36kHz was obtained. It is the shortest envelope duration as far as we know, and it is so short that it can be used as Q-switching pulses directly. At 6.9W of the incident pump power, average output power of 1.24W was achieved and the corresponding peak power and energy of a single Q-switched pulse were 3.44kW and 34.4μJ, respectively. The mode-locked pulses inside the Q-switched pulse envelope had a repetition rate of 780MHz.
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