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High peak power sub-nanosecond pulsed Nd:Lu_015Y_085VO_4 laser with WS_2 saturable absorber and EO modulator

2017; Optica Publishing Group; Volume: 7; Issue: 4 Linguagem: Inglês

10.1364/ome.7.001180

2159-3930

Wenjing Tang, Jia Zhao, Kejian Yang, Shengzhi Zhao, Guiqiu Li, Dechun Li, Tao Li, Wenchao Qiao, Yonggang Wang,

Laser-Matter Interactions and Applications

A few-layer WS2 nanosheet was prepared by the ultrasonic assisted vertical evaporation method and its corresponding characteristics were measured. By simultaneously employing the WS2 nanosheet and electro-optic modulator (EOM) as modulator, a dual-loss-modulation Q-switched and mode-locked (QML) Nd:Lu0.15Y0.85VO4 sub-nanosecond laser with controllable repetition rate and high peak power was presented. The output performances versus the pump power were measured. At the pump power of 8.92 W, the shortest pulse duration was measured to be about 467 ps, corresponding to a peak power of 731 kW. To our knowledge, this is the highest output peak power with WS2 saturable absorbers (SAs) reported.