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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Vol. 39, Iss. 33 — Nov. 20, 2000
  • pp: 6238–6242

Measurements of Benzene Concentration by Difference-Frequency Laser Absorption Spectroscopy

Weidong Chen, Fabrice Cazier, Frank Tittel, and Daniel Boucher  »View Author Affiliations


Applied Optics, Vol. 39, Issue 33, pp. 6238-6242 (2000)
http://dx.doi.org/10.1364/AO.39.006238


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Abstract

Measurements of benzene concentration based on high-resolution laser absorption spectroscopy by use of the <i>R</i>(6) transition in the ν<sub>4</sub> fundamental vibrational band near 14.8 μm (676.6 cm<sup>−1</sup>) are reported. These measurements were performed with a tunable continuous-wave, mid-infrared spectroscopic light source that employs difference-frequency mixing of two Ti:sapphire lasers in a GaSe nonlinear optical crystal. A minimum benzene concentration detection of ~11.5 parts in 10<sup>6</sup> was realized at a reduced pressure of 40 mbars.

© 2000 Optical Society of America

OCIS Codes
(010.1120) Atmospheric and oceanic optics : Air pollution monitoring
(120.6200) Instrumentation, measurement, and metrology : Spectrometers and spectroscopic instrumentation
(190.2620) Nonlinear optics : Harmonic generation and mixing
(300.6340) Spectroscopy : Spectroscopy, infrared
(300.6360) Spectroscopy : Spectroscopy, laser

Citation
Weidong Chen, Fabrice Cazier, Frank Tittel, and Daniel Boucher, "Measurements of Benzene Concentration by Difference-Frequency Laser Absorption Spectroscopy," Appl. Opt. 39, 6238-6242 (2000)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-39-33-6238


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