title: Femtosecond fiber CPA system emitting 830 W average output power.
abstract: In this Letter we report on the generation of 830 W compressed average power from a femtosecond fiber chirped pulse amplification (CPA) system. In the high-power operation we achieved a compressor throughput of about 90% by using high-efficiency dielectric gratings. The output pulse duration of 640 fs at 78 MHz repetition rate results in a peak power of 12 MW. Additionally, we discuss further a scaling potential toward and beyond the kilowatt level by overcoming the current scaling limitations imposed by the transversal spatial hole burning.
authors.affiliation: Friedrich-Schiller-University Jena, Institute of Applied Physics, Albert-Einstein-Str. 15, 07745 Jena, Germany. eidam@iap.uni-jena.de
authors.forename: Tino
authors.initials: T
authors.lastname: Eidam
authors.forename: Stefan
authors.initials: S
authors.lastname: Hanf
authors.forename: Enrico
authors.initials: E
authors.lastname: Seise
authors.forename: Thomas V
authors.initials: TV
authors.lastname: Andersen
authors.forename: Thomas
authors.initials: T
authors.lastname: Gabler
authors.forename: Christian
authors.initials: C
authors.lastname: Wirth
authors.forename: Thomas
authors.initials: T
authors.lastname: Schreiber
authors.forename: Jens
authors.initials: J
authors.lastname: Limpert
authors.forename: Andreas
authors.initials: A
authors.lastname: Tünnermann