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Proceedings Paper

High-resolution absorption coefficient and refractive index spectra of carbon monoxide gas at millimeter and submillimeter wavelength region
Author(s): Mohammed N. Afsar; Hua Chi; Hassan Sobhie
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Paper Abstract

The absorption coefficient and refractive index spectra of carbon monoxide gas are presented together for the first time in the range 300-900 GHz. An extra high resolution dispersive Fourier transform spectrometer was constructed for studies of gas molecules particularly pollutants. Line positioned can now be studied much precisely via dispersion data since the dispersion through a sharp rotational absorption line is a straight line rather than an envelope. It is therefore not necessary to interpolate around the turning point to determine the line position accurately. A demonstration of the much better resolved splitting for the J" equals 4 rotational transition line (at wavenumber equals 19.222 cm-1) is shown. The line position we obtained agrees well with theoretical calculations. Results presented in this paper were obtained at a gas pressure of 250 torr.

Paper Details

Date Published: 19 August 1994
PDF: 6 pages
Proc. SPIE 2211, Millimeter and Submillimeter Waves, (19 August 1994); doi: 10.1117/12.182978
Show Author Affiliations
Mohammed N. Afsar, Tufts Univ. (United States)
Hua Chi, Tufts Univ. (United States)
Hassan Sobhie, Tufts Univ. (United States)

Published in SPIE Proceedings Vol. 2211:
Millimeter and Submillimeter Waves
Mohammed N. Afsar, Editor(s)

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