title: Preferential gain photonic-crystal fiber for mode stabilization at high average powers.
abstract: We report on the design and experimental investigation of a preferential gain photonic-crystal fiber with a mode-field diameter of 47 µm. This few-mode fiber design confines the doping of Ytterbium-ions just to the center of the core and, therefore, promotes fundamental mode operation. In a chirped-pulse amplification system we extracted up to 303 W of average power from this fiber with a measured M2 value of 1.4.
authors.affiliation: Friedrich-Schiller-University Jena, Institute of Applied Physics, Jena, Germany. eidam@iap.uni-jena.de
authors.forename: Tino
authors.initials: T
authors.lastname: Eidam
authors.forename: Steffen
authors.initials: S
authors.lastname: Hädrich
authors.forename: Florian
authors.initials: F
authors.lastname: Jansen
authors.forename: Fabian
authors.initials: F
authors.lastname: Stutzki
authors.forename: Jan
authors.initials: J
authors.lastname: Rothhardt
authors.forename: Henning
authors.initials: H
authors.lastname: Carstens
authors.forename: Cesar
authors.initials: C
authors.lastname: Jauregui
authors.forename: Jens
authors.initials: J
authors.lastname: Limpert
authors.forename: Andreas
authors.initials: A
authors.lastname: Tünnermann
mesh_terms: D000669:Amplifiers, Electronic; D017076:Computer-Aided Design; D004867:Equipment Design; D019544:Equipment Failure Analysis; D005336:Fiber Optic Technology