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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Vol. 36, Iss. 15 — May. 20, 1997
  • pp: 3188–3194

Applications of a compact photothermal-deflection-based setup for trace-gas detection in real-time in situ environmental monitoring and chemical analysis

Bob L. Zimering and A. Claude Boccara  »View Author Affiliations


Applied Optics, Vol. 36, Issue 15, pp. 3188-3194 (1997)
http://dx.doi.org/10.1364/AO.36.003188


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Abstract

We present the application of a compact setup for real-time <i>in situ</i> trace-gas detection based on photothermal beam deflection (mirage-effect) spectroscopy to environmental monitoring and chemical analysis. The setup provides many advantages for local (nonremote) detection applications, such as rapid response and high sensitivity under true <i>in situ</i> conditions. The detection limit of C<sub>2</sub>H<sub>4</sub> in open air is estimated to be 0.25 parts in 10<sup>9</sup>, based on concentration calibration with the dominant noise that is due to atmospheric turbulence on a time scale of 1 s. Detection limits are extrapolated for other species, and applications are explored by real-time measurements of gas emissions from a variety of solid and semisolid samples.

© 1997 Optical Society of America

Citation
Bob L. Zimering and A. Claude Boccara, "Applications of a compact photothermal-deflection-based setup for trace-gas detection in real-time in situ environmental monitoring and chemical analysis," Appl. Opt. 36, 3188-3194 (1997)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-36-15-3188


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