Abstract
Monoclinic thulium-doped magnesium monotungstate, , is promising for efficient power-scalable continuous-wave (CW) and passively Q-switched lasers at . Under diode pumping at 802 nm, a compact CW laser based on -cut generated 3.09 W at 2022–2034 nm with a slope efficiency of 50% which represents the highest output power ever achieved with this type of laser host. Stable passive -switching of the laser is demonstrated for the first time, to the best of our knowledge, using single-walled carbon nanotubes, graphene, and saturable absorbers. Using the latter, the best performance is achieved with 16.1 μJ/13.6 ns pulses at 2017.8 nm with a maximum average output power of 0.87 W and a peak power of 1.18 kW.
© 2017 Optical Society of America
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