Fourier Transform Raman Spectroscopy Using a Bench-Top FT-IR Spectrometer
Fourier transform Raman spectroscopy has been performed with an inexpensive bench-top FT-IR spectrometer optimized for the near-infrared. The laser excitation source was from a continuous-wave Nd: YAG laser with an output at 1.064 μm. Spectra from solid samples, ground as powders, have been obtained. Many of these are well known to fluoresce in the visible region and are thus intrinsically difficult to study by the Raman method. The FT-Raman method is described, and improvements in the technique are considered.
A new structure, suitable for implementing narrow as well as moderately wide transition band FIR filters, is presented. The proposed structure leads to a saving of 20 – 40% in the number of multipliers for moderately wide transition band filters. The saving for the narrow transition band filter increases with decreasing transition width.