title: Scaling the effective area of higher-order-mode erbium-doped fiber amplifiers.
abstract: We demonstrate scaling of the effective area of higher-order mode, Er-doped fiber amplifiers. Two Er-doped higher-order mode fibers, one with 3800 μm(2) A(eff) in the LP(0,11) mode, and one with 6000 μm(2) effective area in the LP(0,14) mode, are demonstrated. Output beam profiles show clean higher order modes, and S(2) imaging measurements show low extraneous higher order mode content. CW and pulsed amplifier experiments are reported. Nanosecond pulses are amplified to 0.5 mJ pulse energy with 0.5 MW peak power.
authors.affiliation: OFS Laboratories, 19 Schoolhouse Road, Suite 105, Somerset, New Jersey 08873, USA. jwn@ofsoptics.com
authors.forename: J W
authors.initials: JW
authors.lastname: Nicholson
authors.forename: J M
authors.initials: JM
authors.lastname: Fini
authors.forename: A M
authors.initials: AM
authors.lastname: DeSantolo
authors.forename: X
authors.initials: X
authors.lastname: Liu
authors.forename: K
authors.initials: K
authors.lastname: Feder
authors.forename: P S
authors.initials: PS
authors.lastname: Westbrook
authors.forename: V R
authors.initials: VR
authors.lastname: Supradeepa
authors.forename: E
authors.initials: E
authors.lastname: Monberg
authors.forename: F
authors.initials: F
authors.lastname: DiMarcello
authors.forename: R
authors.initials: R
authors.lastname: Ortiz
authors.forename: C
authors.initials: C
authors.lastname: Headley
authors.forename: D J
authors.initials: DJ
authors.lastname: DiGiovanni