| Abstract
| - Wave packet motion in the laser dye oxazine 1 in methanol is investigated by spectrally resolved transientabsorption spectroscopy. The spectral range of 600−690 nm was accessible by amplified broadband probepulses covering the overlap region of ground-state bleach and stimulated emission signal. The influence ofvibrational wave packets on the optical signal is analyzed in the frequency domain and the time domain. Forthe analysis in the frequency domain an algorithm is presented that accounts for interference effects ofneighbored vibrational modes. By this method amplitude, phase and decay time of vibrational modes areretrieved as a function of probe wavelength and distortions due to neighbored modes are reduced. The analysisof the data in the time domain yields complementary information on the intensity, central wavelength, andspectral width of the optical bleach spectrum due to wave packet motion.
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