Open AccessUltrafast thin-disk multipass laser amplifier delivering 14 kW (47 mJ, 1030 nm) average power converted to 820 W at 515 nm and 234 W at 343 nm
Author(s) -
Jan-Philipp Negel,
André Loescher,
Andreas Voß,
Dominik Bauer,
Dirk Sutter,
Alexander Killi,
Marwan Abdou Ahmed,
Thomas Graf
Publication year - 2015
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.23.021064
Subject(s) - amplifier , materials science , optics , laser , regenerative amplification , wavelength , ultrashort pulse , laser beam quality , optoelectronics , thin disk , second harmonic generation , optical amplifier , laser beams , physics , stars , cmos , astronomy
We report on an Yb:YAG thin-disk multipass laser amplifier delivering sub-8 ps pulses at a wavelength of 1030 nm with 1420 W of average output power and 4.7 mJ of pulse energy. The amplifier is seeded by a regenerative amplifier delivering 6.5 ps pulses with 300 kHz of repetition rate and an average power of 115 W. The optical efficiency of the multipass amplifier was measured to be 48% and the beam quality factor was better than M 2 = 1.4. Furthermore we report on the external second harmonic generation from 1030 nm to 515 nm using an LBO crystal leading to an output power of 820 W with 2.7 mJ of energy per pulse. This corresponds to a conversion efficiency of 70%. Additionally, 234 W of average power were obtained at the third harmonic with a wavelength of 343 nm.