title: Single-frequency ytterbium doped photonic bandgap fiber amplifier at 1178 nm.
abstract: 1178 nm single-frequency amplification by Yb doped photonic bandgap fiber has been demonstrated. 24.6 W output power and 12 dB gain were obtained without parasitic lasing and also stimulated Brillouin scattering. 1.8 dB suppression of Brillouin gain by an acoustic antiguiding effect has been found in the Yb doped photonic bandgap fiber.
authors.affiliation: Institute for Laser Science, University of Electro-Communications, 1-5-1 Chofugaoka, Chofu, Tokyo 182-8585, Japan. chen@ils.uec.ac.jp
authors.forename: Mingchen
authors.initials: M
authors.lastname: Chen
authors.forename: Akira
authors.initials: A
authors.lastname: Shirakawa
authors.forename: Xinyan
authors.initials: X
authors.lastname: Fan
authors.forename: Ken-Ichi
authors.initials: K
authors.lastname: Ueda
authors.forename: Christina B
authors.initials: CB
authors.lastname: Olausson
authors.forename: Jens K
authors.initials: JK
authors.lastname: Lyngsø
authors.forename: Jes
authors.initials: J
authors.lastname: Broeng