Hannover 2003 – scientific programme

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Q: Quantenoptik

Q 12: Nichtlineare Femtosekunden-Effekte (gemeinsam mit MO)

Q 12.4: Talk

Monday, March 24, 2003, 15:45–16:00, E001

A novel Kerr Shutter Design for Femtosecond Fluorescence Spectroscopy — •Bernhard Schmidt, Stefan Laimgruber, and Peter Gilch — Sektion Physik, Ludwig-Maximilians-Universität, Oettingenstr. 67, D-80538 München, Germany

Conventionally, fluorescence spectroscopy in the femtosecond regime relies on the up-conversion technique. In the recent years the optical Kerr shutter has gained importance in the field. Here, a novel Kerr set-up with a high optical through-put and very low time zero dispersion (∼ 200 fs through out the visible spectrum) is presented. It comprises two Cassegranians to collect the fluorescence light and focus it onto a Kerr medium and two thin film polarisers to extinguish the fluorescence light. In combination with a spectrometer coupled to a CCD camera the set-up delivers spectrally resolved fluorescence decay profiles in very short aquisition times (∼ 5 min).