title: High-power air-clad large-mode-area photonic crystal fiber laser.
abstract: We report on a 2.3 m long air-clad ytterbium-doped large-modearea photonic crystal fiber laser generating up to 80 W output power with a slope efficiency of 78%. Single transverse mode operation is achieved with a mode-field area of 350 microm2. No thermo-optical limitations are observed at the extracted ~35W/m, therefore such fibers allow scaling to even higher powers.
authors.forename: Jens
authors.initials: J
authors.lastname: Limpert
authors.forename: T
authors.initials: T
authors.lastname: Schreiber
authors.forename: S
authors.initials: S
authors.lastname: Nolte
authors.forename: H
authors.initials: H
authors.lastname: Zellmer
authors.forename: T
authors.initials: T
authors.lastname: Tunnermann
authors.forename: R
authors.initials: R
authors.lastname: Iliew
authors.forename: F
authors.initials: F
authors.lastname: Lederer
authors.forename: J
authors.initials: J
authors.lastname: Broeng
authors.forename: G
authors.initials: G
authors.lastname: Vienne
authors.forename: A
authors.initials: A
authors.lastname: Petersson
authors.forename: C
authors.initials: C
authors.lastname: Jakobsen