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A simple and compact all-solid-state green-pulse laser source is described. A diode-pumped Nd:YAG laser is Q-switched by a GaAs saturable absorber and intra-cavity frequency-doubled by a KTP crystal. At 3.7 W of pump power the device produces high-quality 20.5-μJ, 25-ns pulses at a pulse repetition rate of 12 kHz. The dynamics of the pulse formation is described by rate equations and an energy-level model which accounts for the various energy-transfer processes in GaAs.
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Kajava et al. (1997) studied this question.
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