We have experimentally studied the passive Q-switching performance of a diode-pumped Nd-doped gadolinium gallium garnet (Nd:GGG) laser with a GaAs saturable absorber. Stable Q-switched pulses as short as 9 ns with a repetition rate of 196.1 kHz have been obtained with an appropriately coated GaAs wafer used as the output coupler. At 12.44 W of the absorbed pump power, an average output power of 1.03 W has been obtained and the corresponding pulse energy and peak power are 5.25 μJ and 0.58 kW, respectively.
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Qin et al. (2008) studied this question.
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