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A passively Q-switched mode-locked all-solid-state YVO4/Nd:YVO4 composite crystal laser with a low-temperature (LT)-GaAs saturable absorber mirror was realized. Q-switched mode-locking pulses laser with about 100% modulation depth was obtained at the pump power of 3 W and the mode-lock pulse trains inside the Q-switch pulse envelope have a repetition rate of ∼ 110 MHz. An average output power of 4 W was achieved at the pump power of 18 W, corresponding to an optical slope efficiency of 22.2%. The instability of the laser was 0.12% at the pump power of 15 W.
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Li et al. (2008) studied this question.
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