Skip to main content
Article thumbnail
Location of Repository

Progress with optical gas sensors using correlation spectroscopy

By J.P. Dakin, H.O. Edwards and B.H. Weigl

Abstract

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

Topics: QC, TK
Year: 1995
OAI identifier: oai:eprints.soton.ac.uk:77142
Provided by: e-Prints Soton

Suggested articles


To submit an update or takedown request for this paper, please submit an Update/Correction/Removal Request.