Differential Excitation Raman Spectroscopy
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United States of America Patent
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Apr 14, 2016
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Apr 14, 2016
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Abstract
Raman instrumentation for detecting for the presence of a molecular species in a including: a source of radiation for pumping the sample; apparatus for controlling the frequency and pulse width of radiation from the pumping source; a Raman spectrometer including a detector and means for collecting scattered photons from the sample; a radiation source for probing the sample; means for directing radiation from the probing source to the sample; and means to interface the spectrometer with the source of radiation for pumping. The radiation source for probing is, preferably, a monochromatic light source emitting radiation in at least one of the group including UV, visible, and near infrared radiation and, preferably, in the range of 220-1080 nm. The photons collected from the sample include elastically and inelastically scattered photons, and the spectrometer further including means for rejecting the elastically scattered photons. The pumping source is a microwave source.
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