Monoclinic Tm3+:MgWO4: a promising crystal for continuous-wave and passively Q-switched lasers at ¿2¿¿m

Identificador:  PC:3316

Handle: https://hdl.handle.net/20.500.11797/PC3316

Autores:  Mateos, X.; Loiko, P.; Serres, J. M.; Aguiló, M.; Xavier Mateos; Zhang, L.; Lin, Z.; Lin, H.; Zhang, G.; Yumashev , K.; Petrov, V.; Griebner, U.; Wang, Y.; Yung, S.; Rotermund, F.; Chen, W.

Resumen:
Monoclinic thulium-doped magnesium monotungstate, Tm3+:MgWO4, is promising for efficient power-scalable continuous-wave (CW) and passively Q-switched lasers at >2 ¿m. Under diode-pumping at 802 nm, a compact CW laser based on Z-cut Tm:MgWO4 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 Q-switching of the Tm:MgWO4 laser is demonstrated for the first time using single-walled carbon nanotubes (SWCNTs), graphene and Cr2+:ZnS saturable absorbers. Using the latter best performance are achieved with 16.1 ¿J / 13.6 ns pulses at 2017.8 nm with to a maximum average output power of 0.87 W and a peak power of 1.18 kW