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Proceedings Paper

Referencing systems for evanescent wave sensors
Author(s): George Stewart; Douglas F. Clark; Brian Culshaw; Ivan Andonovic
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Paper Abstract

The use of optical waveguides as chemical sensors requires a referencing system to compensate for the effect of contamination on the surface of the sensor. In this paper, we propose the use of two waves with different penetration depths for their evanescent fields in order to correct measurements. Several schemes are considered, including two-wavelength, two-mode and polarisation discrimination techniques. It is shown that good results can be obtained using TE0 and TM0 modes in a high index film.

Paper Details

Date Published: 1 September 1990
PDF: 8 pages
Proc. SPIE 1314, Fibre Optics '90, (1 September 1990); doi: 10.1117/12.21987
Show Author Affiliations
George Stewart, Univ. of Strathclyde (United Kingdom)
Douglas F. Clark, Univ. of Strathclyde (United Kingdom)
Brian Culshaw, Univ. of Strathclyde (United Kingdom)
Ivan Andonovic, Univ. of Strathclyde (United Kingdom)

Published in SPIE Proceedings Vol. 1314:
Fibre Optics '90

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