Stuttgart 2012 – wissenschaftliches Programm
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A: Fachverband Atomphysik
A 25: Poster: Attosecond physics
A 25.4: Poster
Mittwoch, 14. März 2012, 16:30–19:00, Poster.V
Measurement of sub-1.5-cycle pulses from a single filament — •Martin Kretschmar1, Daniel S. Steingrube1, Emilia Schulz1, Uwe Morgner1, Milutin Kovacev1, Dominik Hoff2, Peter Hansinger2, and Gerhard G. Paulus2 — 1Leibniz Universität Hannover, Institut für Quantenoptik, Welfengarten 1, D-30167 Hannover, Germany; QUEST, Centre for Quantum Engineering and Space-Time Research, Hannover, Germany — 2Friedrich-Schiller-Universität Jena , Institut für Optik und Quantenelektronik , Max-Wien-Platz 1, D-07743 Jena
Femtosecond laser filamentation is a prominent approach for few-cycle pulse generation. The precise characterization of the time-dependent electric field of such a pulse is challenging but necessary for the understanding of strong-field effects occuring during filamentary propagation. We present an experimental setup capable of measuring the pulse duration and CEO-phase contributions of pulses originating from a femtosecond filament. The experiment consists of a semi-infinite gas cell which truncates the filament at different positions and a Stereo-ATI-Phasemeter, enabling the measurement of the pulse duration of the resulting beam. We report on the dependence of the resulting pulses upon various experimental parameters resulting in the observation of pronounced pulse splitting signatures. We identify pulses with a sub-1.5-cycle temporal duration emerging from a single filament.