title: 22  GW peak-power fiber chirped-pulse-amplification system.
abstract: In this Letter, we report on a femtosecond fiber chirped-pulse-amplification system based on the coherent combination of the output of four ytterbium-doped large-pitch fibers. Each single channel delivers a peak power of about 6.2 GW after compression. The combined system emits 200 fs long pulses with a pulse energy of 5.7 mJ at 230 W of average power together with an excellent beam quality. The resulting peak power is 22 GW, which to the best of our knowledge is the highest value directly emitted from any fiber-based laser system.
authors.forename: Arno
authors.initials: A
authors.lastname: Klenke
authors.forename: Steffen
authors.initials: S
authors.lastname: Hädrich
authors.forename: Tino
authors.initials: T
authors.lastname: Eidam
authors.forename: Jan
authors.initials: J
authors.lastname: Rothhardt
authors.forename: Marco
authors.initials: M
authors.lastname: Kienel
authors.forename: Stefan
authors.initials: S
authors.lastname: Demmler
authors.forename: Thomas
authors.initials: T
authors.lastname: Gottschall
authors.forename: Jens
authors.initials: J
authors.lastname: Limpert
authors.forename: Andreas
authors.initials: A
authors.lastname: Tünnermann