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We present pump-probe measurements that reveal significant changes in the group delay dispersion of a femtosecond laser pulse being controlled by the relative delay between two pulses. We suggest applications for this time-domain shaping approach.
We present the first compact, all-fiber probe laser system for mid-IR photothermal spectroscopy. Images of the vibrational CH bands of a liquid crystal sample with high contrast are demonstrated.
Time-resolved absorption of a 500-fs laser pulse by fused silica is measured. The results evidence a strong contribution of linear absorption for high pump fluence, during the entire pulse length.
A fast all fiber based setup for stimulated Raman spectroscopy with a rapidly wavelength swept cw-laser is presented. It enables flexible acquisition of broadband (750 cm−1 to 3150 cm−1) spectra with high resolution (0.5 cm−1).
Time- and angle-resolved photoemission spectroscopy directly enables observation of electron dynamics in condensed matter. Using EUV high harmonic probe extends the observation window in energy and momentum. Tunable mid-infrared pumping allows control of excitation mechanisms.
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