Berlin 2005 – scientific programme

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Q: Quantenoptik und Photonik

Q 39: Nichtlineare optische Effekte & Lichtquellen

Q 39.1: Talk

Tuesday, March 8, 2005, 10:45–11:00, HU 2014a

Filling a spectral hole via self-phase modulation — •Andreas Präkelt, Matthias Wollenhaupt, Cristian Sarpe-Tudoran, Andreas Assion, and Thomas Baumert — Universität Kassel, Institut für Physik und CINSaT, Heinrich-Plett-Str. 40, D-34132 Kassel, Germany

Self-phase modulation is used in different nonlinear optical experiments, such as nonlinear femtosecond laser pulse compression techniques and transient absorption spectroscopy. We used a spatial light modulator to remove an interval of frequency components from the spectrum of a femtosecond laser pulse. Spectral redistribution effects, due to self-phase modulation were studied close and below the threshold energies. We give a physical picture of the surprising effect that the removed frequency components are not only generated by self-phase modulation but even overshoot their neighboring frequencies in power spectral density. In addition, we investigate possible applications in the field of nonlinear microscopy.