Diode-pumped acoustic-optical (AO) Q-switched, passively Q-switched, and double Q-switched Nd:KGW lasers were realized, respectively. Their pulse characteristics were researched. Experiments prove double Q-switching laser can generate a symmetric and shorter pulse when compared with purely AO and passive Q-switching. The double Q-switched laser pulse width of 37.7 ns has been achieved at the incident pump power of 3 W.
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