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A compact diode-pumped passively Q-switched laser has been demonstrated with a coated Cr4+:YAG crystal as both a saturable absorber and an output coupler. When CW pumped with a fibre-coupled laser diode, the laser produces pulses of 5–30 ns duration, with a repetition rate of 75–90 kHz. The highest peak power was 430 W, obtained at 1.6 W of pump power, which is a 520 times enhancement in comparison to an output power of 830 mW under CW operation.
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CHEN et al. (1997) studied this question.
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