Patent ID: 8456629
Filing Date: 2013-06-04
Classification: G01N

Abstract:
1. A spectroscopic measurement apparatus for measuring a Raman spectrum of an object volume containing a plurality of different molecules, comprising: pump optical pulse train generation means configured for generating a pump optical pulse train having an arbitrary repetition rate; irradiation means for irradiating a single location in an object volume to be measured with said pump optical pulse train and with a probe light to excite impulsive stimulated Raman scattering; detection means for detecting vibrational coherence information of the object volume in response to the probe light and excitation of impulsive stimulated Raman scattering by said pump optical pulse train; and spectrum acquisition means for acquiring a Raman spectrum of the object volume including at least vibrational frequency information and vibrational phase relaxation time information, in response to collecting vibrational coherence information from the object detected by said detection means for each of a plurality of different repetition frequencies of the pump optical pulse train.