Hannover 2013 – wissenschaftliches Programm
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A: Fachverband Atomphysik
A 33: Interaction with strong or short laser pulses III
A 33.5: Vortrag
Donnerstag, 21. März 2013, 12:00–12:15, B 302
Emergence of sub-1.5-cycle pulses from a single filament — •Martin Kretschmar1,2, Daniel S. Steingrube1,2, Dominik Hoff3, Emilia Schulz1,2, Peter Hansinger3, Thomas Binhammer4, Gerhard G. Paulus3, Uwe Morgner1,2, and Milutin Kovacev1,2 — 1Leibniz Universität Hannover, Institut für Quantenoptik, Welfengarten 1, D-30167 Hannover, Germany — 2QUEST, Centre for Quantum Engineering and Space-Time Research, Welfengarten 1, D-30167 Hannover, Germany — 3Friedrich-Schiller-Universität Jena, Institut für Optik und Quantenelektronik, Max-Wien-Platz 1, D-07743 Jena, Germany — 4VENTEON Laser Technologies GmbH, D-30827 Garbsen, Germany
Filamentation has become a versatile tool for pulse shortening, making it applicable in attosecond science. Complex spatio-temporal dynamics taking place during the filamentation process strongly influence the propagating pulse, leading to few-cycle pulse generation as well as high-order harmonic generation directly inside the filament. Temporal dynamics of ultrashort laser pulses undergoing filamentary propagation are determined with a stereographic above-threshold ionization (ATI) phasemeter. The setup is capable of measuring the pulse duration as well as CEO-phase contributions of pulses originating from a fs-filament. We observe the formation of few-cycle pulses as well as temporal pulse splitting dynamics along the propagation direction of the filament. We demonstrate a pulse measurement of 3.8 fs duration, corresponding to sub-1.5 cycles of the electric field, emerging from a single fully propagated filament.