Passively Q-switched dual-wavelength Yb:LSO laser based on tungsten disulphide saturable absorber
Liu Jing-Hui1, Tian Jin-Rong1, †, , Guoyu He-Yang1, Xu Run-Qin1, Li Ke-Xuan1, Song Yan-Rong1, ‡, , Zhang Xin-Ping1, Su Liang-Bi2, Xu Jun2
       

(a) WS2 dispersion after ultrasonication and centrifuging. (b) The AFM scan image of WS2 NPs and thickness of the WS2 film.