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Optica Publishing Group
  • CLEO/Europe and EQEC 2009 Conference Digest
  • (Optica Publishing Group, 2009),
  • paper CH_P12

Sulfur dioxide measurements by correlation spectroscopy using an ultraviolet light-emitting diode

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Abstract

Gas sensing by optical methods employs traditionally conventional broadband radiation sources or narrow-band lasers to take advantage of the specific absorption spectra of the studied gas. The gas correlation spectroscopy (COSPEC) technique is particularly simple and immune to spectral interference because it utilizes a reference gas cell to recognize and quantify the amount of the same gas in the sample volume. This technique can be used in monitoring industrial and volcanic emissions by employing various light sources, including thermal background radiation [1], broadband lasers [2], light emitting diodes (LED) [3] and multi-mode diode lasers [4]. Recently, a particularly compact and cost effective LED-based implementation of COSPEC has been demonstrated for measurement of sulfur dioxide (SO2) pollution [5].

© 2009 IEEE

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