title: Single-mode and high power waveguide lasers fabricated by ion-exchange.
abstract: We report on a single-end diode-pumped waveguide laser providing output power in excess of 20 mW with 17% slope efficiency in robust single longitudinal and transverse mode operation at 1533.5 nm. The active medium was an Er:Yb-doped waveguide only 9-mm long fabricated by Ag-Na ion-exchange in a phosphate glass. The overall cavity length including butt-coupled fiber-Bragg-grating mirrors was <60 mm. We also report on high power waveguide lasers providing more than 160 mW output power and 46% slope efficiency in multimode operation. Feasibility of high power single mode waveguide lasers based on ion-exchange technology in phosphate glasses is also experimentally investigated by using a 50-mm long active waveguide specially designed for efficient single-end pumping.
authors.affiliation: Dipartimento di Fisica, Politecnico di Milano, Piazza L. da Vinci 32, 20133 Milano, Italy. giuseppe.dellavalle@polimi.it
authors.forename: G
authors.initials: G
authors.lastname: Della Valle
authors.forename: A
authors.initials: A
authors.lastname: Festa
authors.forename: G
authors.initials: G
authors.lastname: Sorbello
authors.forename: K
authors.initials: K
authors.lastname: Ennser
authors.forename: C
authors.initials: C
authors.lastname: Cassagnetes
authors.forename: D
authors.initials: D
authors.lastname: Barbier
authors.forename: S
authors.initials: S
authors.lastname: Taccheo
mesh_terms: D004867:Equipment Design; D019544:Equipment Failure Analysis; D007477:Ions; D007834:Lasers; D007909:Lenses; D012031:Refractometry / Q000295:instrumentation*
chemical_list: D007477:Ions