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Compact diode-pumped 1.1 kW Yb:YAG Innoslab femtosecond amplifier
P Russbueldt1, T Mans, J Weitenberg
1Fraunhofer Institute for Laser Technology, Steinbachstrasse 15, 52074 Aachen, Germany. peter.russbueldt@ilt.fraunhofer.de
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.
