title: Diode-pumped microchip Tm:KLu(WO₄)₂ laser with more than 3 W of output power.
abstract: A diode-pumped microchip laser containing a quasi-monolithic plano-plano cavity is realized on the basis of a Tm:KLu(WO₄)₂ crystal. The maximum CW output power is 3.2 W (at an absorbed pump power of 6.8 W) and the slope efficiency as high as 50.4%. The laser is operating at 1946 nm in the TEM₀₀ mode with a M²<1.05. Microchip operation with Tm:KLu(WO₄)₂ is, in principle, due to a special crystal cut along the N(g) optical indicatrix axis. This crystal cut possesses positive near-spherical thermal lens that provides the required mode stabilization in the plano-plano cavity. Sensitivity factors of the thermal lens, "generalized" thermo-optic coefficients and constants describing the photoelastic effect are determined for the monolithic Tm:KLu(WO₄)₂ crystal.
authors.forename: Josep Maria
authors.initials: JM
authors.lastname: Serres
authors.forename: Xavier
authors.initials: X
authors.lastname: Mateos
authors.forename: Pavel
authors.initials: P
authors.lastname: Loiko
authors.forename: Konstantin
authors.initials: K
authors.lastname: Yumashev
authors.forename: Nikolai
authors.initials: N
authors.lastname: Kuleshov
authors.forename: Valentin
authors.initials: V
authors.lastname: Petrov
authors.forename: Uwe
authors.initials: U
authors.lastname: Griebner
authors.forename: Magdalena
authors.initials: M
authors.lastname: Aguiló
authors.forename: Francesc
authors.initials: F
authors.lastname: Díaz