Component Identification in Multi-Chemical Mixtures With Swept-Wavelength Resonant-Raman Spectroscopy

Abstract : The Swept Wavelength Optical Resonant Raman Detector (SWOrRD) at the Naval Research Laboratory is scanned through the 220 nm to 260 nm window of the ultraviolet and generates two dimensional spectral maps allowing for rapid identification of chemical materials. We create a library of chemicals whose Raman spectral features partially overlap and then measure the mixtures created by combinations of the library set. The library and mixtures are identically processed and loaded into a detection program. This system, utilizing a linear combination model enables the deconvolution of the multi chemical liquid mixture and a reconstitution of the fractional molecular abundances.