title: Diffraction-limited polarized emission from a multimode ytterbium fiber amplifier after a nonlinear beam converter.
abstract: The multimode and depolarized output beam of a highly multimode diode-pumped Yb-doped fiber amplifier is converted to a diffraction-limited, linearly polarized beam by a self-referencing two-wave-mixing process in an infrared-sensitive photorefractive crystal (Rh:BaTiO3). As much as 11.6 W of single-mode output is achieved with a 78% multimode-to-single-mode photorefractive conversion efficiency.
authors.affiliation: Thales Research and Technology-France, Domaine de Corbeville, 91404 Orsay, France. laurent.lombard@thalesgroup.com
authors.forename: L
authors.initials: L
authors.lastname: Lombard
authors.forename: A
authors.initials: A
authors.lastname: Brignon
authors.forename: J P
authors.initials: JP
authors.lastname: Huignard
authors.forename: E
authors.initials: E
authors.lastname: Lallier
authors.forename: G
authors.initials: G
authors.lastname: Lucas-Leclin
authors.forename: P
authors.initials: P
authors.lastname: Georges
authors.forename: G
authors.initials: G
authors.lastname: Pauliat
authors.forename: G
authors.initials: G
authors.lastname: Roosen