We have experimentally studied the passive Q-switching performance of a Nd:YAG ceramic laser with GaAs saturable absorbers. It was found that, depending on the laser intensity in the wafer, the Q-switched pulses obtained could have very different pulse width and pulse energy. The shortest pulse obtained has 4.7 ns pulse width, 6.25 µJ pulse energy and 1.33 kW peak power. Furthermore we show that, by adding a slit in the cavity, the Q-switched pulse stability could be significantly improved.
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Xie et al. (2007) studied this question.
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