title: Laser action along and near the optic axis of a holmium-doped KY(WO₄)₂ crystal.
abstract: We demonstrate the first (to our knowledge) quasi-three-level conical refraction laser operating at 2 μm, with 1.6 W of output power at 2074 nm, using a holmium-doped KY(WO4)2 crystal. A maximum slope efficiency of 52% has been achieved, along the optic axis with respect to the absorbed pump power. Furthermore, lasing operation around the optic axis has been performed. In this case, a maximum output power of 3 W has been reached, with a slope efficiency better than 70%, which are the best performances ever reported on this material.
authors.forename: Romain
authors.initials: R
authors.lastname: Cattoor
authors.forename: Inka
authors.initials: I
authors.lastname: Manek-Hönninger
authors.forename: Daniel
authors.initials: D
authors.lastname: Rytz
authors.forename: Lionel
authors.initials: L
authors.lastname: Canioni
authors.forename: Marc
authors.initials: M
authors.lastname: Eichhorn