title: Dual-wavelength passively Q-switched Nd:GYSGG laser by tungsten disulfide saturable absorber.
abstract: A dual-wavelength passively Q-switched Nd:GYSGG laser using vacuum evaporating tungsten disulfide (WS2) as a saturable absorber was demonstrated for the first time to the best of our knowledge. The WS2saturable absorber was prepared simply by evaporating nanometer WS2powders onto a quartz substrate in a vacuum. By inserting the WS2saturable absorber into the laser cavity, stable Q-switched laser operation was achieved with a maximum average output power of 367 mW, a pulse repetition rate of 70.7 kHz, the shortest pulse width of 591 ns, and pulse energy of about 1.05 μJ. By vacuum evaporation method, a high-quality WS2saturable absorber can be produced, and it seems to be a suitable method for fabrication of 2D transition metal dichalcogenides.
authors.forename: Y J
authors.initials: YJ
authors.lastname: Gao
authors.forename: B Y
authors.initials: BY
authors.lastname: Zhang
authors.forename: Q
authors.initials: Q
authors.lastname: Song
authors.forename: G J
authors.initials: GJ
authors.lastname: Wang
authors.forename: W J
authors.initials: WJ
authors.lastname: Wang
authors.forename: M H
authors.initials: MH
authors.lastname: Hong
authors.forename: R Q
authors.initials: RQ
authors.lastname: Dou
authors.forename: D L
authors.initials: DL
authors.lastname: Sun
authors.forename: Q L
authors.initials: QL
authors.lastname: Zhang