title: High-concentration Er:YAG single-crystal fibers grown by laser-heated pedestal growth technique.
abstract: High-concentration Er:YAG single-crystal fibers have been grown using the laser-heated pedestal growth technique. Instability in the melt and concomitant opacity of fibers were observed at source concentrations higher than 15 mol.%. Spectroscopic examination shows that broadening of the linewidth of the ⁴I(13/2) → ⁴I(15/2) transition is strongly dependent on Er³⁺ concentration.
authors.affiliation: Systems, Power & Energy Research Division, School of Engineering, University of Glasgow, Glasgow G12 8QQ, UK.
authors.forename: P C W
authors.initials: PC
authors.lastname: Shi
authors.forename: I A
authors.initials: IA
authors.lastname: Watson
authors.forename: J H
authors.initials: JH
authors.lastname: Sharp