title: Narrow linewidth, 100 W cw Yb3+-doped silica fiber laser with a point-by-point Bragg grating inscribed directly into the active core.
abstract: We report on the power scaling to 103 W of a 1.1 microm continuous-wave Yb(3+)-doped silica fiber laser incorporating a point-by-point (PbP) fiber-Bragg grating inscribed directly into the active core using 800 nm femtosecond laser pulses. The spectrum of the laser exhibited a narrow linewidth that broadened to 260 pm at 103 W. The output was frequency doubled using an 11 mm long periodically poled MgO:LiNbO3 crystal to generate 2.1 W of green with an internal conversion efficiency of 10% at high power and 0.81%/W at low power.
authors.affiliation: Centre for Ultrahigh-bandwidth Devices for Optical Systems, Centre for Lasers and Applications, Department of Physics, Macquarie University, Australia. njovanov@ics.mq.edu.au
authors.forename: Nemanja
authors.initials: N
authors.lastname: Jovanovic
authors.forename: Mattias
authors.initials: M
authors.lastname: Aslund
authors.forename: Alexander
authors.initials: A
authors.lastname: Fuerbach
authors.forename: Stuart D
authors.initials: SD
authors.lastname: Jackson
authors.forename: Graham D
authors.initials: GD
authors.lastname: Marshall
authors.forename: Michael J
authors.initials: MJ
authors.lastname: Withford