title: High-power rod-type photonic crystal fiber laser.
abstract: We report on a novel ytterbium-doped fiber design that combines the advantages of rod and fiber gain media. The fiber design has outer dimensions of a rod laser, meaning a diameter in the range of a few millimeters and a length of just a few tens of centimeters, and includes two important waveguide structures, one for pump radiation and one for laser radiation. We obtained 120-W output power in single-mode beam quality from a 48-cm-long fiber cane that corresponds to an extracted power of 250 W/m. The fiber has significantly reduced nonlinearity, which therefore allows for scalability in the performance of a high-peak-power fiber laser and amplifier system.
authors.forename: J
authors.initials: J
authors.lastname: Limpert
authors.forename: N
authors.initials: N
authors.lastname: Deguil-Robin
authors.forename: I
authors.initials: I
authors.lastname: Manek-Hönninger
authors.forename: F
authors.initials: F
authors.lastname: Salin
authors.forename: F
authors.initials: F
authors.lastname: Röser
authors.forename: A
authors.initials: A
authors.lastname: Liem
authors.forename: T
authors.initials: T
authors.lastname: Schreiber
authors.forename: S
authors.initials: S
authors.lastname: Nolte
authors.forename: H
authors.initials: H
authors.lastname: Zellmer
authors.forename: A
authors.initials: A
authors.lastname: Tünnermann
authors.forename: J
authors.initials: J
authors.lastname: Broeng
authors.forename: A
authors.initials: A
authors.lastname: Petersson
authors.forename: C
authors.initials: C
authors.lastname: Jakobsen