A passively Q-switched Nd:YVO_4 laser at 1064 nm is demonstrated based on a gold nanotriangle saturable absorber(GNT SA).Under a pump power of 3.82 W,the maximum average output power of 218mW is achieved,corresponding to a slope efficiency of 12.9%.The minimum pulse width is 165ns and the maximum pulse repetition rate is 300kHz at the pump power of 3.48 W.Our results prove that the GNT SA is a promising saturable absorber for near-infrared lasers.
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