Abstract
Raman spectroscopy in samples exhibiting laser-induced fluorescence (LIF) is studied using fluorescence background rejection and the techniques of ultrashort pulse excitation and time-resolved detection. It is shown theoretically that the ratio of the Raman scattering intensity to the LIF intensity can be enhanced by a factor of τ/ t 1 over the case of continuous wave (CW) pumping and detection, where τ is the emissive lifetime of the fluorescent contaminators, and t 1 is the temporal resolution of the system. Experimental results using a streak camera system and picosecond laser are presented.
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