title: 522 W average power, spectrally beam-combined fiber laser with near-diffraction-limited beam quality.
abstract: We report a three-channel, spectrally beam-combined (SBC), 1 mum fiber laser that produces 522 W of average power with near-diffraction-limited (M2 ~ 1.2) beam quality. The laser features a SBC power combining efficiency of 93%, versatile master-oscillator, power-amplifier fiber channels with up to 260 W of narrow-band, polarized, and near-diffraction-limited output that is tunable over nearly the entire 1 micro m Yb(3+) gain bandwidth, and excellent prospects for significant power scaling. To our knowledge, these results represent the highest beam quality and average power achieved to date for a beam-combined fiber laser system.
authors.affiliation: Aculight Corporation, Bothell, WA 98011, USA. tom.loftus@aculight.com
authors.forename: Thomas H
authors.initials: TH
authors.lastname: Loftus
authors.forename: Anping
authors.initials: A
authors.lastname: Liu
authors.forename: Paul R
authors.initials: PR
authors.lastname: Hoffman
authors.forename: Alison M
authors.initials: AM
authors.lastname: Thomas
authors.forename: Marc
authors.initials: M
authors.lastname: Norsen
authors.forename: Rob
authors.initials: R
authors.lastname: Royse
authors.forename: Eric
authors.initials: E
authors.lastname: Honea