title: Monoclinic Tm3+:MgWO4: a promising crystal for continuous-wave and passively Q-switched lasers at ∼2  μm.
abstract: Monoclinic thulium-doped magnesium monotungstate, Tm3+:MgWO4, is promising for efficient power-scalable continuous-wave (CW) and passively Q-switched lasers at >2  μm. Under diode pumping at 802 nm, a compact CW laser based on Z-cut Tm:MgWO4generated 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:MgWO4laser is demonstrated for the first time, to the best of our knowledge, using single-walled carbon nanotubes, graphene, and Cr2+:ZnS 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.
authors.forename: Pavel
authors.initials: P
authors.lastname: Loiko
authors.forename: Josep Maria
authors.initials: JM
authors.lastname: Serres
authors.forename: Xavier
authors.initials: X
authors.lastname: Mateos
authors.forename: Magdalena
authors.initials: M
authors.lastname: Aguiló
authors.forename: Francesc
authors.initials: F
authors.lastname: Díaz
authors.forename: Lizhen
authors.initials: L
authors.lastname: Zhang
authors.forename: Zhoubin
authors.initials: Z
authors.lastname: Lin
authors.forename: Haifeng
authors.initials: H
authors.lastname: Lin
authors.forename: Ge
authors.initials: G
authors.lastname: Zhang
authors.forename: Konstantin
authors.initials: K
authors.lastname: Yumashev
authors.forename: Valentin
authors.initials: V
authors.lastname: Petrov
authors.forename: Uwe
authors.initials: U
authors.lastname: Griebner
authors.forename: Yicheng
authors.initials: Y
authors.lastname: Wang
authors.forename: Sun Yung
authors.initials: SY
authors.lastname: Choi
authors.forename: Fabian
authors.initials: F
authors.lastname: Rotermund
authors.forename: Weidong
authors.initials: W
authors.lastname: Chen