title: Coherent beam combination of narrow-linewidth 1.5 μm fiber amplifiers in a long-pulse regime.
abstract: We report what we believe to be the first experimental demonstration of coherent beam combining of two fiber amplifiers in a 100 ns pulse regime using a signal leak between the pulses. Pulses of ∼100 W stimulated-Brillouin-scattering limited peak power are combined with 95% efficiency, a residual phase error of λ/27, and no significant beam quality degradation.
authors.affiliation: Office National d'Etudes et Recherches Aérospatiales (ONERA), Palaiseau, France. Laurent.Lombard@onera.fr
authors.forename: L
authors.initials: L
authors.lastname: Lombard
authors.forename: A
authors.initials: A
authors.lastname: Azarian
authors.forename: K
authors.initials: K
authors.lastname: Cadoret
authors.forename: P
authors.initials: P
authors.lastname: Bourdon
authors.forename: D
authors.initials: D
authors.lastname: Goular
authors.forename: G
authors.initials: G
authors.lastname: Canat
authors.forename: V
authors.initials: V
authors.lastname: Jolivet
authors.forename: Y
authors.initials: Y
authors.lastname: Jaouën
authors.forename: O
authors.initials: O
authors.lastname: Vasseur