Berlin 2005 – wissenschaftliches Programm
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Q: Quantenoptik und Photonik
Q 35: Erzeugung ultrakurzer Lichtimpulse
Q 35.7: Vortrag
Dienstag, 8. März 2005, 12:15–12:30, HU 1070
High-energy passively mode-locked Ti:sapphire oscillator — •Sergey Naumov1, Alma Fernandez1, Dimitris Papadopoulos2, Gabriel Tempea3, Vladislav Yakovlev4, Takao Fuji1, Vladimir Kalashnikov4, Evgeny Podivilov5, Alexander Chernykh5, Alexander Apolonski5,6, and Ferenc Krausz1,6 — 1Max-Planck-Institut für Quantenoptik, Hans-Kopfermann-Str. 1, D-85748 Garching, Germany — 2National Technical University of Athens, Greece — 3Femtolasers Produktions GmbH, Fernkorngasse 10, A-1110 Vienna, Austria — 4Institut für Photonik, Technische Universität Wien, Gusshausstr. 27, A-1040 Vienna, Austria — 5Institute of Automation and Electrometry, RAS, 630090 Novosibirsk, Russia — 6Ludwig-Maximilians-Universität München, 85748 Garching, Germany
We demonstrate a line of Ti:sapphire oscillators generating 130-300 nJ pulses of 27-35 fs at a repetition rate of 3-11 MHz. Excessive nonlinearities are avoided by chirped picosecond pulse generation from the oscillator with positive net GDD followed by an extracavity pulse compression.
Our theoretical analysis testifies that chirped pulse generation in a positive dispersion regime provides pulse energies that are by order of magnitude higher than in conventional lasers with negative dispersion.
Such high-energy sub-30 fs pulses at MHz repetition rate are of interest for scientific applications (e.g. generation of high harmonics) as well as for technological ones (micromachining).