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Gas detection by correlation spectroscopy employing a multimode diode laser

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Author

  • Xiutao Lou
  • Gabriel Somesfalean
  • Zhang Zhiguo

Summary, in English

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 CO2 mixed with CO as an interfering gas is successfully demonstrated using a 1570 run 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.

Department/s

Publishing year

2008

Language

English

Pages

2392-2398

Publication/Series

Applied Optics

Volume

47

Issue

13

Document type

Journal article

Publisher

Optical Society of America

Topic

  • Atom and Molecular Physics and Optics

Status

Published

ISBN/ISSN/Other

  • ISSN: 2155-3165