Progress with optical gas sensors using correlation spectroscopy

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).


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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.

Item Type: Article
Digital Object Identifier (DOI): doi:10.1016/0925-4005(95)01667-8
Additional Information: first presented at Europt(R)ode II, Florence, 19-21 Apr 1994
ISSNs: 0925-4005 (print)
Related URLs:
Keywords: correlation spectroscopy, optical sensors, gas sensors
ePrint ID: 77142
Date :
Date Event
October 1995Published
Date Deposited: 11 Mar 2010
Last Modified: 18 Apr 2017 20:33
Further Information:Google Scholar

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