München 2019 – wissenschaftliches Programm
K 3.3: Vortrag
Dienstag, 19. März 2019, 14:40–15:00, HS 3
Towards a Joule-Class Ultrafast Thin-Disk Based Amplifier at Kilohertz Repetition Rate — •Clemens Herkommer1,2, Peter Krötz1, Sandro Klingebiel1, Christoph Wandt1, Dominik Bauer3, Knut Michel1, Reinhard Kienberger2, and Thomas Metzger1 — 1TRUMPF Scientific Lasers GmbH & Co. KG, Feringastr. 10a, 85774 Unterföhring — 2Techn. Universität München, Physik-Department, James-Franck-Str. 1, 85748 Garching — 3TRUMPF Laser GmbH, Aichhalder Str. 39, 78713 Schramberg
In the recent years, thin-disk based regenerative amplifiers (RAs) have enabled the generation of sub-picosecond laser pulses with energies exceeding 200 mJ. Applications such as the pumping of OPCPAs and the generation of high-harmonics and x-rays are currently addressed. Nevertheless, there is a desire for even higher peak powers, realized by higher pulse energies along with shorter pulse durations. Scaling the pulse energy within a RA requires adapting the cavity mode size, however, the limited aperture of currently available Pockels cells remains the bottleneck for the achievable output energy.
In this contribution we report on the development of a thin-disk based high-energy multipass amplifier operating at 1 kHz, circumventing the current energy limitation of RAs. The chirped pulse amplifier consists of a fiber oscillator delivering chirped seed pulses, a RA pre-amplifying the pulses to 200 mJ, and the multipass amplifier, consisting of two thin-disk laser heads, boosting the pulse energy to 600 mJ. Currently, by using further amplifier stages, a laser source with sub-ps pulse durations and pulse energies of >1 Joule is under construction.