Backscattering Raman spectroscopy using multi-grating spatial heterodyne Raman spectrometer

A Monolithic Spatial Heterodyne Raman Spectrometer: Initial Tests

“…The basic design and operation of the SHRS has been discussed previously. 1–11,20–41 In the interferometer, collimated light is passed through a 50:50 beam splitter, dividing the beam into two parts which are directed onto tilted diffraction gratings. After being diffracted off the gratings, the beams recombine at the beamsplitter as crossing wave fronts.…”

Analysis and Classification of Liquid Samples Using Spatial Heterodyne Raman Spectroscopy

“…16 A multigrating SHS instrument for Raman spectroscopy has been developed in. 17,18 Methods for processing the SHS interferograms were discussed in a number of papers and included the flat-field correction, 19 phase error, 20 data reduction routines, 21 and interferogram distortion correction. 22 Spatial heterodyne spectroscopy figures of merit, namely the resolution, spectral range, and sensitivity have been discussed in Cooke et al 23 Lenzner and Diels, 24 and Perkins et al 25 Cooke et al 23 described the design of an infrared SHS with the resolving power of about 1000 and spectral coverage 8.5-9.5 µm.…”

“…Perkins et al 25 presented an acute analysis of an overall performance of SHS based on modeling SHS systems. In general, SHS systems used for spectrochemical analyses, e.g., Raman and LIBS, exhibit resolving powers ~1000-6000 and spectral bandwidth between 150 nm and 50 nm depending on the grating density, typically 150 or 300 mm -1 as in [9][10][11][12]16,18,26 . It is worth noting that all the aforementioned publications on SHS-Raman report only the qualitative Raman analyses.…”

“…17 and Liu et al. 18 Methods for processing the SHS interferograms were discussed in a number of papers and included the flat-field correction, 19 phase error, 20 data reduction routines, 21 and interferogram distortion correction. 22…”

“…In general, SHS systems used for spectrochemical analyses, e.g., Raman and LIBS, exhibit resolving powers ∼1000–6000 and spectral bandwidth between 150 nm and 50 nm depending on the grating density, typically 150 or 300 mm −1 as in literature. 9–12,16,18,26 It is worth noting that all the aforementioned publications on SHS–Raman report only the qualitative Raman analyses. Meanwhile, the interferometry-based Raman spectroscopy is capable of providing the quantitative information as well.…”