title: Directly diode-pumped high-energy Ho:YAG oscillator.
abstract: We report on the high-energy laser operation of an Ho:YAG oscillator resonantly pumped by a GaSb-based laser diode stack at 1.9 μm. The output energy was extracted from a compact plano-concave acousto-optically Q-switched resonator optimized for low repetition rates. Operating at 100 Hz, pulse energies exceeding 30 mJ at a wavelength of 2.09 μm were obtained. The corresponding pulse duration at the highest pump power was 100 ns, leading to a maximum peak power above 300 kW. Different pulse repetition rates and output coupling transmissions of the Ho:YAG resonator were studied. In addition, intracavity laser-induced damage threshold measurements are discussed.
authors.affiliation: LISA Laser Products OHG, Katlenburg-Lindau, Germany. samir.lamrini@ruhr‐uni‐bochum.de
authors.forename: Samir
authors.initials: S
authors.lastname: Lamrini
authors.forename: Philipp
authors.initials: P
authors.lastname: Koopmann
authors.forename: Michael
authors.initials: M
authors.lastname: Schäfer
authors.forename: Karsten
authors.initials: K
authors.lastname: Scholle
authors.forename: Peter
authors.initials: P
authors.lastname: Fuhrberg
mesh_terms: D004867:Equipment Design; D006695:Holmium / Q000737:chemistry*; D054023:Lasers, Semiconductor; D053844:Lasers, Solid-State; D009991:Oscillometry / Q000295:instrumentation*
chemical_list: D006695:Holmium