title: Kerr self-cleaning of pulsed beam in an ytterbium doped multimode fiber.
abstract: We experimentally demonstrate that Kerr spatial self-cleaning of a pulsed beam can be obtained in an amplifying multimode optical fiber. An input peak power of 500 W only was sufficient to produce a quasi-single-mode emission from the double-clad ytterbium doped multimode fiber (YMMF) with non-parabolic refractive index profile. We compare the self-cleaning behavior observed in the same fiber with loss and with gain. Laser gain introduces new opportunities to achieve spatial self-cleaning of light in multimode fibers at a relatively low power threshold.
authors.forename: R
authors.initials: R
authors.lastname: Guenard
authors.forename: K
authors.initials: K
authors.lastname: Krupa
authors.forename: R
authors.initials: R
authors.lastname: Dupiol
authors.forename: M
authors.initials: M
authors.lastname: Fabert
authors.forename: A
authors.initials: A
authors.lastname: Bendahmane
authors.forename: V
authors.initials: V
authors.lastname: Kermene
authors.forename: A
authors.initials: A
authors.lastname: Desfarges-Berthelemot
authors.forename: J L
authors.initials: JL
authors.lastname: Auguste
authors.forename: A
authors.initials: A
authors.lastname: Tonello
authors.forename: A
authors.initials: A
authors.lastname: Barthélémy
authors.forename: G
authors.initials: G
authors.lastname: Millot
authors.forename: S
authors.initials: S
authors.lastname: Wabnitz
authors.forename: V
authors.initials: V
authors.lastname: Couderc