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Progress with optical gas sensors using correlation spectroscopy

Record type: Article

The paper reviews recent progress on gas detection using real-time correlation spectroscopy. The general method relies on using a gas sample in a reference cell as a matched optical filter, to preferentially detect similar absorption spectra in a measurement cell. All variations of the method have the advantage of excellent selectivity for gases with narrow line spectra, even when using broadband sources for illumination. They are also suitable for remote detection over optical fibre leads. The recent progress is in two main areas. Firstly, the earlier reported Stark modulation method has been extended to investigate a novel hygrometer. Secondly, we have developed a novel multi-line light source, by combining a broadband optical source with a Michelson interferometer, where the latter contains a gas in one arm.

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Citation

Dakin, J.P., Edwards, H.O. and Weigl, B.H. (1995) Progress with optical gas sensors using correlation spectroscopy Sensors and Actuators B: Chemical, 29, (1-3), pp. 87-93. (doi:10.1016/0925-4005(95)01667-8).

More information

Published date: October 1995
Additional Information: first presented at Europt(R)ode II, Florence, 19-21 Apr 1994
Keywords: correlation spectroscopy, optical sensors, gas sensors

Identifiers

Local EPrints ID: 77142
URI: http://eprints.soton.ac.uk/id/eprint/77142
ISSN: 0925-4005
PURE UUID: 6d40f70a-b725-4372-82b4-64c288f27861

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Date deposited: 11 Mar 2010
Last modified: 18 Jul 2017 23:34

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Contributors

Author: J.P. Dakin
Author: H.O. Edwards
Author: B.H. Weigl

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