Vij, Jagdish K., Corcoran, Patrick, Computer-controlled submillimeter Fourier spectrometer , IEEE Transactions on Instrumentation and Measurement, 38, 1, 1989, 85 - 91
IEEE Transactions on Instrumentation and Measurement; 38; 1;
Abstract-A system for a submillimeter wave Fourier transform
spectroscopy (FTS) has been automated for the measurement of the
power absorption coefficient of liquids in the wavenumber range 10-
400 cm-’. The interferometer is interfaced with a RM380Z Research
Machines microcomputer. Software and hardware have been developed
to automate the process of collecting and storing the data. Some
points of relevance to the analysis of interferometric data are reviewed
including the use of phase modulation, the resolution of spectra computed
using the discrete Fourier transform, and the necessity of proper
optical filtering in spectrometers which use Fourier transform techniques.
Spectra measured using the FTS system described here have
been compared with results obtained recently using a tunable submillimeter
laser and a good agreement is found between the two sets of
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