title: Compact, highly efficient ytterbium doped bismuthate glass waveguide laser.
abstract: Laser slope efficiencies close to the quantum defect limit and in excess of 78% have been obtained from an ultrafast laser inscribed buried channel waveguide fabricated in a ytterbium-doped bismuthate glass. The simultaneous achievement of low propagation losses and preservation of the fluorescence properties of ytterbium ions is the basis of the outstanding laser performance.
authors.affiliation: Scottish Universities Physics Alliance, School of Engineering and Physical Sciences, Department of Physics, Heriot-Watt University, Edinburgh, UK. rm330@hw.ac.uk
authors.forename: R
authors.initials: R
authors.lastname: Mary
authors.forename: S J
authors.initials: SJ
authors.lastname: Beecher
authors.forename: G
authors.initials: G
authors.lastname: Brown
authors.forename: R R
authors.initials: RR
authors.lastname: Thomson
authors.forename: D
authors.initials: D
authors.lastname: Jaque
authors.forename: S
authors.initials: S
authors.lastname: Ohara
authors.forename: A K
authors.initials: AK
authors.lastname: Kar