Passively Q-Switched Er:LuAG Laser at 1.65 μm Using MoS2 and WS2 Saturable Absorbers

We describe passively
Q
-switched Er:LuAG laser characteristics at 1.65
μ
m for the first time, with MoS
₂
and WS
₂
as the saturable absorber, respectively. The saturable absorbers were both prepared with the liquid phase exfoliation method. A shortest pulse width of 1.1
μ
s was attained with the pulse repetition frequency of 41.6 kHz for the MoS
₂
saturable absorber, resulting in the highest peak power of 4.33 W. For the WS
₂
saturable absorber, a minimum pulse of 1.6
μ
s was gained with the pulse repetition frequency of 34.2 kHz and the calculated peak power of 4.13 W.