title: Lasing action at around 1.9 μm from an ultrafast laser inscribed Tm-doped glass waveguide.
abstract: We report optical guiding and laser action at around 1.9 μm in a Tm³⁺-doped fluorogermanate glass waveguide fabricated using ultrafast laser inscription. A monolithic laser cavity was constructed by directly butt coupling dielectric mirrors to each facet of the 6.0 mm long Tm³⁺-doped waveguide. When the waveguide was pumped by a Ti:sapphire laser tuned to 791 nm, laser oscillation was achieved at around 1.91 μm. This waveguide laser exhibited a maximum slope efficiency of 6% and a maximum output power of 32 mW when pumped with 620 mW of incident laser power.
authors.affiliation: Scottish Universities Physics Alliance, J. F. Allen Physics Research Laboratories, School of Physics and Astronomy, University of St. Andrews, St. Andrews, KY16 9SS, Scotland, UK.
authors.forename: F
authors.initials: F
authors.lastname: Fusari
authors.forename: R R
authors.initials: RR
authors.lastname: Thomson
authors.forename: G
authors.initials: G
authors.lastname: Jose
authors.forename: F M
authors.initials: FM
authors.lastname: Bain
authors.forename: A A
authors.initials: AA
authors.lastname: Lagatsky
authors.forename: N D
authors.initials: ND
authors.lastname: Psaila
authors.forename: A K
authors.initials: AK
authors.lastname: Kar
authors.forename: A
authors.initials: A
authors.lastname: Jha
authors.forename: W
authors.initials: W
authors.lastname: Sibbett
authors.forename: C T A
authors.initials: CT
authors.lastname: Brown