title: 53 W average power few-cycle fiber laser system generating soft x rays up to the water window.
abstract: We report on a few-cycle laser system delivering sub-8-fs pulses with 353 μJ pulse energy and 25 GW of peak power at up to 150 kHz repetition rate. The corresponding average output power is as high as 53 W, which represents the highest average power obtained from any few-cycle laser architecture so far. The combination of both high average and high peak power provides unique opportunities for applications. We demonstrate high harmonic generation up to the water window and record-high photon flux in the soft x-ray spectral region. This tabletop source of high-photon flux soft x rays will, for example, enable coherent diffractive imaging with sub-10-nm resolution in the near future.
authors.forename: Jan
authors.initials: J
authors.lastname: Rothhardt
authors.forename: Steffen
authors.initials: S
authors.lastname: Hädrich
authors.forename: Arno
authors.initials: A
authors.lastname: Klenke
authors.forename: Stefan
authors.initials: S
authors.lastname: Demmler
authors.forename: Armin
authors.initials: A
authors.lastname: Hoffmann
authors.forename: Thomas
authors.initials: T
authors.lastname: Gotschall
authors.forename: Tino
authors.initials: T
authors.lastname: Eidam
authors.forename: Manuel
authors.initials: M
authors.lastname: Krebs
authors.forename: Jens
authors.initials: J
authors.lastname: Limpert
authors.forename: Andreas
authors.initials: A
authors.lastname: Tünnermann