title: 1-kilowatt CW all-fiber laser oscillator pumped with wavelength-beam-combined diode stacks.
abstract: We have demonstrated a monolithic cladding-pumped ytterbium-doped single all-fiber laser oscillator generating 1 kW of CW signal power at 1080 nm with 71% slope efficiency and near diffraction-limited beam quality. Fiber components were highly integrated on "spliceless" passive fibers to promote laser efficiency and alleviate non-linear effects. The laser was pumped through a 7:1 pump combiner with seven 200-W 91x nm fiber-pigtailed wavelength-beam-combined diode-stack modules. The signal power of such a single all-fiber laser oscillator showed no evidence of roll-over, and the highest output was limited only by available pump power.
authors.affiliation: Alfalight, Inc., 1832 Wright Street, Madison, Wisconsin 53704, USA. yxiao@alfalight.com
authors.forename: Y
authors.initials: Y
authors.lastname: Xiao
authors.forename: F
authors.initials: F
authors.lastname: Brunet
authors.forename: M
authors.initials: M
authors.lastname: Kanskar
authors.forename: M
authors.initials: M
authors.lastname: Faucher
authors.forename: A
authors.initials: A
authors.lastname: Wetter
authors.forename: N
authors.initials: N
authors.lastname: Holehouse
mesh_terms: D000669:Amplifiers, Electronic; D004867:Equipment Design; D019544:Equipment Failure Analysis; D054023:Lasers, Semiconductor; D009991:Oscillometry / Q000295:instrumentation*