Abstract

The measurement of optically subtracted interferograms in Fourier transform infrared (FT-IR) spectroscopy allows the use of the more sensitive mercury cadmium telluride (MCT) detector with intense sources without exceeding the dynamic range of a 15-bit analog-to-digital converter. The method was first suggested by Coleman and was first experimentally demonstrated by Bar-Lev. Since that time there have been a number of attempts to incorporate the dual-beam principle into far infrared and mid infrared FT-IR spectrometers, and even into a special purpose commercial GC-IR instrument.

Fourier transform infrared spectroscopy: recent developments

Peter R. Griffiths
Appl. Opt. 17(9) 1315-1317 (1978)

Fourier-transform infrared derivative spectroscopy with an improved signal-to-noise ratio

M. R. Fetterman
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Beam-splitter effects in dual-input Fourier transform spectroscopy

Locke D. Spencer, David A. Naylor, Peter A. R. Ade, and Jin Zhang
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Artificial diamond as a broadband infrared beam splitter for Fourier transform spectroscopy: improved results

John C. Brasunas
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Methodology for computing Fourier-transform infrared spectroscopy interferograms

B. N. Carnio, O. Moutanabbir, and A. Y. Elezzabi
Appl. Opt. 62(17) 4518-4523 (2023)