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Q: Fachverband Quantenoptik und Photonik
Q 14: Ultrakurze Pulse: Erzeugung II
Q 14.8: Talk
Monday, March 2, 2009, 18:15–18:30, VMP 8 R206
Generation of 8 fs, 125 mJ Pulses by use of Optical Parametric Chirped Pulse Amplification — Daniel Herrmann1, Laszlo Veisz1, Raphael Tautz1, Franz Tavella2, Karl Schmid1,3, Alexander Buck1, Vladimir Pervak3, Michael Scharrer4, Philip Russell4, and •Ferenc Krausz1,3 — 1Max-Planck Institut für Quantenoptik, Garching, Deutschland — 2HASYLAB/DESY, Hamburg, Germany — 3Department für Physik Ludwigs-Maximilian-Universität München, Garching — 4Max-Planck Forschungsgruppe Institut für Optik, Information und Photonik, Universität Erlangen-Nürnberg, Erlangen, Deutschland
We report generation of three-cycle, 8 fs, 125 mJ optical pulses in a noncollinear optical parametric chirped-pulse amplifier (NOPCPA). These 16 TW laser pulses are compressed to within 6% of their Fourier limit. Our system starts with a broad-bandwidth frontend with improved hollow-core fiber, which delivers seed pulses with an energy of 0.4 mJ at 1 kHz repetition rate. It is optically synchronized with a Nd:YAG laser, which provides 532 nm pump pulses of 1.2 J energy and 80 ps duration at 10 Hz repetition rate. We use a negative-dispersive grism pair and an acousto-optic modulator to stretch the seed pulse to 30 ps with 3 microjoules energy for seeding the single-pass two-stage NOPCPA. After amplification, the signal energy is 150 mJ. Subsequently, the amplified signal pulse is compressed by use of glass bulks and chirped mirrors, and is characterized by using a home-built autocorrelator and a FROG device. This laser system permits exploring attosecond and high-field physics in a so far inaccessible regime.