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Applied Optics

Applied Optics


  • Editor: James C. Wyant
  • Vol. 47, Iss. 13 — May. 1, 2008
  • pp: 2392–2398

Gas detection by correlation spectroscopy employing a multimode diode laser

Xiutao Lou, Gabriel Somesfalean, and Zhiguo Zhang  »View Author Affiliations

Applied Optics, Vol. 47, Issue 13, pp. 2392-2398 (2008)

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A gas sensor based on the gas-correlation technique has been developed using a multimode diode laser (MDL) in a dual-beam detection scheme. Measurement of CO 2 mixed with CO as an interfering gas is successfully demonstrated using a 1570 nm tunable MDL. Despite overlapping absorption spectra and occasional mode hops, the interfering signals can be effectively excluded by a statistical procedure including correlation analysis and outlier identification. The gas concentration is retrieved from several pair-correlated signals by a linear-regression scheme, yielding a reliable and accurate measurement. This demonstrates the utility of the unsophisticated MDLs as novel light sources for gas detection applications.

© 2008 Optical Society of America

OCIS Codes
(140.2020) Lasers and laser optics : Diode lasers
(140.3600) Lasers and laser optics : Lasers, tunable
(300.1030) Spectroscopy : Absorption
(300.6260) Spectroscopy : Spectroscopy, diode lasers
(300.6340) Spectroscopy : Spectroscopy, infrared

ToC Category:

Original Manuscript: December 13, 2007
Revised Manuscript: April 1, 2008
Manuscript Accepted: April 4, 2008
Published: April 28, 2008

Xiutao Lou, Gabriel Somesfalean, and Zhiguo Zhang, "Gas detection by correlation spectroscopy employing a multimode diode laser," Appl. Opt. 47, 2392-2398 (2008)

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