title: 135 W average-power femtosecond pulses at 520 nm from a frequency-doubled fiber laser system.
abstract: We present a high-average-power femtosecond laser system at 520 nm central wavelength. The laser system delivers sub-500 fs pulses with 135 W average power at a pulse repetition rate of 5.25 MHz. Excellent beam quality is provided by high power fiber amplifiers and maintained during frequency doubling, resulting in a beam quality factor of M2<1.2. To our knowledge, the system presented here is the highest average power green laser source generating femtosecond pulses with diffraction-limited beam quality.
authors.affiliation: Friedrich Schiller University Jena, Institute of Applied Physics, Jena, Germany. jan.rothhardt@uni-jena.de
authors.forename: Jan
authors.initials: J
authors.lastname: Rothhardt
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: Thomas
authors.initials: T
authors.lastname: Gottschall
authors.forename: Thomas V
authors.initials: TV
authors.lastname: Andersen
authors.forename: Jens
authors.initials: J
authors.lastname: Limpert
authors.forename: Andreas
authors.initials: A
authors.lastname: Tünnermann