title: Holmium-doped Lu2O3, Y2O3, and Sc2O3 for lasers above 2.1 μm.
abstract: Efficient room-temperature laser operation was obtained in the wavelength range from 2117 nm to 2134 nm with Ho:Lu(2)O(3) and Ho:Y(2)O(3) as the active materials. With an FBG-stabilized Tm-doped fiber laser as the pump source, the maximum slope efficiency and output power of the Ho:Y(2)O(3) laser were 63% and 18.8 W, respectively. With Ho:Lu(2)O(3) the respective values were 76% and 25.2 W. With Ho:Sc(2)O(3) as the active material the accessible wavelength range could be expanded to 2158 nm in a diode-pumped setup.
authors.affiliation: Institute of Laser-Physics, University of Hamburg, Luruper Chaussee 149, 22761 Hamburg, Germany. philipp.koopmann@physnet.uni-hamburg.de
authors.forename: Philipp
authors.initials: P
authors.lastname: Koopmann
authors.forename: Samir
authors.initials: S
authors.lastname: Lamrini
authors.forename: Karsten
authors.initials: K
authors.lastname: Scholle
authors.forename: Michael
authors.initials: M
authors.lastname: Schäfer
authors.forename: Peter
authors.initials: P
authors.lastname: Fuhrberg
authors.forename: Günter
authors.initials: G
authors.lastname: Huber
mesh_terms: D004867:Equipment Design; D019544:Equipment Failure Analysis; D054023:Lasers, Semiconductor; D008670:Metals / Q000737:chemistry*; D010087:Oxides / Q000737:chemistry*
chemical_list: D008670:Metals; D010087:Oxides