title: 26 mJ, 130 W Q-switched fiber-laser system with near-diffraction-limited beam quality.
abstract: We demonstrate a Q-switched fiber laser system emitting sub-60 ns pulses with 26 mJ pulse energy and near-diffraction-limited beam quality (M2<1.3). In combination with a repetition rate of 5 kHz, a corresponding average output power of 130 W is achieved. This record performance is enabled by a large-pitch fiber with a core diameter of 135 µm. This fiber allows for effective single-mode operation with mode field diameters larger than 90 µm even at average output powers exceeding 100 W.
authors.affiliation: Institute of Applied Physics, Abbe Center of Photonics, Friedrich-Schiller-Universität Jena, Jena, Germany. fabian.stutzki@uni‐jena.de
authors.forename: Fabian
authors.initials: F
authors.lastname: Stutzki
authors.forename: Florian
authors.initials: F
authors.lastname: Jansen
authors.forename: Andreas
authors.initials: A
authors.lastname: Liem
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