Berlin 2005 – wissenschaftliches Programm
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K: Kurzzeitphysik
K 2: Lasersysteme und Strahlungsquellen
K 2.2: Vortrag
Montag, 7. März 2005, 15:15–15:35, HU 3092
Intense phase-stable few-cycle laser pulses from selfcompression through filamentation — •Jens Biegert1, Philip Schlup1, Christoph P. Hauri1, Wouter Kornelis1, Arne Heinrich1, Marcel Anscombe1, Ursula Keller1, Arnaud Couairon2, and Andre Mysyrowicz3 — 1Physik Department, Swiss Federal Institute of Technology (ETH), Zürich, Switzerland — 2Centre de Physique Theorique, Ecole Polytechnique, CNRS UMR 7644, F-91128 Palaiseau Cedex, France — 3Laboratoire dOptique Appliquee, Ecole Polytechnique, F-91761 Palaiseau Cedex, France
We present a novel simple technique for the generation of intense few-cycle pulses based on self-filamentation. Self-filamentation provides a strong re-modulation of the driving laser field with previously measured emerging pulse durations of longer than 64 fs. In our experiment we succeeded in the generation of intense few-cycle pulses through self-filamentation caused by simple propagation of amplified 42-fs laser pulses at a repetition rate of 1 kHz in a noble gas atmosphere. The broadest spectrum generated by self-guiding supports transform-limited pulse durations of 1.8 fs with an energy of more than 0.4 mJ. Due to the limited bandpass of our commercially available chirped mirrors the supercontinuum is presently compressed to a duration of 5.7 fs. We confirm that filamentation preserves the pulse phase hence it is ideally suited as a rugged and simple source of intense few-cycle CEO-phase-locked pulses. A full 3D simulation was employed to confirm the formation of a filament as well as the experimental results.