title: Compact diode-pumped 1.1 kW Yb:YAG Innoslab femtosecond amplifier.
abstract: We demonstrate a compact diode-pumped Yb:KGW femtosecond oscillator-Yb:YAG Innoslab amplifier master oscillator power amplifier (MOPA) with nearly transform-limited 636 fs pulses at 620 W average output power, 20 MHz repetition rate, and beam quality of M(x)(2) = 1.43 and M(y)(2) = 1.35. By cascading two amplifiers, we attain an average output power of 1.1 kW, a peak power of 80 MW, and a 615 fs pulse width in a single linearly polarized beam. The power-scalable MOPA is operated at room temperature, and no chirped-pulse amplification technique is used.
authors.affiliation: Fraunhofer Institute for Laser Technology, Steinbachstrasse 15, 52074 Aachen, Germany. peter.russbueldt@ilt.fraunhofer.de
authors.forename: P
authors.initials: P
authors.lastname: Russbueldt
authors.forename: T
authors.initials: T
authors.lastname: Mans
authors.forename: J
authors.initials: J
authors.lastname: Weitenberg
authors.forename: H D
authors.initials: HD
authors.lastname: Hoffmann
authors.forename: R
authors.initials: R
authors.lastname: Poprawe