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Q: Fachverband Quantenoptik und Photonik

Q 29: Poster I

Q 29.26: Poster

Tuesday, March 3, 2009, 16:30–19:00, VMP 8 Foyer

Measurement and compensation of undesired phase and amplitude effects in fs polarization pulse shaping — •Jens Köhler, Marc Krug, Cristian Sarpe-Tudoran, Matthias Wollenhaupt, and Thomas Baumert — Universität Kassel, Institut für Physik und Center for Interdisciplinary Nanostructure Science and Technology (CINSaT), Heinrich-Plett-Str. 40, D-34132 Kassel, Germany

Femtosecond polarization pulse shaping is a tool to generate pulses with a time-dependent polarization profile on an ultrashort timescale. The realization of such pulses is often affected by undesired polarization-dependent amplitude modulations and phase shifts introduced by the pulse shaper as well as additional optical elements. Accurate generation of polarization-shaped pulses requires taking into account these effects and correcting the optical setup accordingly. Approaches to detect these effects based on a rotating polarizer and a spectral interference technique are presented and compared. In addition, we show effective compensation implementations making use of specifically designed transmission gratings, appropriate wave plates and the pulse shaper itself. Femtosecond laser pulses with different polarization states generated with our high-resolution polarization pulse shaper were analyzed employing the same optical scheme and Photoelectron Imaging Spectroscopy (PEIS). Results on the compensation of amplitude and phase effects are presented.