Abstract
Considerable progress has been made in recent years in the field of spectroscopic applications of ultrashort laser pulses. In vibrational spectroscopy numerous investigations have been performed studying ultrafast relaxation processes in condensed matter, mostly using Raman techniques.1 These measurements benefit from the extreme time resolution and high intensity achieved by short light pulses and are also facilitated by the large number density of liquids and solids. In this short article two different approaches will be discussed: (i) an IR technique is presented which complements coherent Raman scattering; (ii) a Fourier Raman method is described with high frequency resolution.
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