Hamburg 2009 – wissenschaftliches Programm

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MO: Fachverband Molekülphysik

MO 5: Quantenkontrolle 1

MO 5.4: Vortrag

Montag, 2. März 2009, 14:45–15:00, VMP 6 HS-G

Generation and characterization of polarization-shaped broadband visible femtosecond laser pulses — •Tatjana Löhrig, Christoph Benjamin Schwarz, Frank Dimler, Florian Langhojer, Ulrike Selig, and Tobias Brixner — Institut für Physikalische Chemie, Universität Würzburg, Am Hubland, 97074 Würzburg

The laser pulses presented here are generated in a noncollinear optical parametric amplifier (NOPA). Polarization shaping is achieved by an LCD pulse shaper specifically designed for broadband visible laser pulses. The pulses are spectrally dispersed by a volume phase holographic grating which exhibits a high and flat diffraction efficiency over the entire visible spectral range. All other optical components are reflective in order to minimize material dispersion.

A novel method of pulse characterization is described which is based on dual-channel spectral interferometry. It is a combination of dual-quadrature spectral interferometry to extract the phases of the two linearly independent polarization components of the pulse and a tomographic pulse measurement to yield the relative phase between them.

First examples are shown and compared to the results of conventional dual-channel spectral interferometry.