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Optics Letters

Optics Letters


  • Vol. 21, Iss. 24 — Dec. 15, 1996
  • pp: 2011–2013

Chemical recognition of gases and gas mixtures with terahertz waves

R. H. Jacobsen, D. M. Mittleman, and M. C. Nuss  »View Author Affiliations

Optics Letters, Vol. 21, Issue 24, pp. 2011-2013 (1996)

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A time-domain chemical-recognition system for classifying gases and analyzing gas mixtures is presented. We analyze the free induction decay exhibited by gases excited by far-infrared (terahertz) pulses in the time domain, using digital signal-processing techniques. A simple geometric picture is used for the classification of the waveforms measured for unknown gas species. We demonstrate how the recognition system can be used to determine the partial pressures of an ammonia–water gas mixture.

© 1996 Optical Society of America

Original Manuscript: August 9, 1996
Published: December 15, 1996

R. H. Jacobsen, D. M. Mittleman, and M. C. Nuss, "Chemical recognition of gases and gas mixtures with terahertz waves," Opt. Lett. 21, 2011-2013 (1996)

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