title: Improving Spectral Results Using Row-by-Row Fourier Transform of Spatial Heterodyne Raman Spectrometer Interferogram.
abstract: This work describes a method of applying the Fourier transform to the two-dimensional Fizeau fringe patterns generated by the spatial heterodyne Raman spectrometer (SHRS), a dispersive interferometer, to correct the effects of certain types of optical alignment errors. In the SHRS, certain types of optical misalignments result in wavelength-dependent and wavelength-independent rotations of the fringe pattern on the detector. We describe here a simple correction technique that can be used in post-processing, by applying the Fourier transform in a row-by-row manner. This allows the user to be more forgiving of fringe alignment and allows for a reduction in the mechanical complexity of the SHRS.
authors.affiliation: Department of Chemistry and Biochemistry, University of South Carolina, Columbia, SC, USA.
authors.forename: Patrick D
authors.initials: PD
authors.lastname: Barnett
authors.affiliation: Department of Chemistry and Biochemistry, University of South Carolina, Columbia, SC, USA.
authors.forename: K Alicia
authors.initials: KA
authors.lastname: Strange
authors.affiliation: Department of Chemistry and Biochemistry, University of South Carolina, Columbia, SC, USA.
authors.forename: S Michael
authors.initials: SM
authors.lastname: Angel
keywords: Fourier transform; Fourier transform Raman (FT-Raman); Raman spectroscopy; SHRS; spatial heterodyne Raman spectrometer