title: High power air-clad photonic crystal fibre laser.
abstract: An Ytterbium-doped photonic crystal fibre laser is demonstrated with a 100 microm2 core area and single transverse mode with an output efficiency of 30 %. Double-clad PCF laser structures are demonstrated with pump cladding NA greater than 0.8 and output power up to 3.9 W. Such lasers are potentially scalable to high power.
authors.forename: W
authors.initials: W
authors.lastname: Wadsworth
authors.forename: R
authors.initials: R
authors.lastname: Percival
authors.forename: G
authors.initials: G
authors.lastname: Bouwmans
authors.forename: J
authors.initials: J
authors.lastname: Knight
authors.forename: P
authors.initials: P
authors.lastname: Russell