MoTe 2 saturable absorber for passively Q-switched Ho,Pr:LiLuF 4 laser at ∼3 μm

Abstract Multilayer molybdenum ditelluride (MoTe 2 ) nanosheets were prepared by liquid-phase exfoliation (LPE) method. A YAG-based MoTe 2 saturable absorption (SA) was consequently fabricated. The MoTe 2 -SA was employed in a passively Q-switched Ho,Pr:LiLuF 4 laser at 2.95 μm. Under the absorbed pump power of 3.8 W, an average output power of 90 mW was achieved. The shortest pulse duration of 670 ns was generated with an output power of 73 mW and a repetition rate of 76.46 kHz, corresponding to a pulse energy of 0.95 μJ.