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Proceedings Paper

Development of an LED-based fiber optic oxygen sensor using a sol-gel-derived coating
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Paper Abstract

Two evanescent wave fiber optic sensors for oxygen are reported: (i) intensity-based, and (ii) based on phase fluorimetry. Both sensors employ the quenching by oxygen of the fluorescence form a ruthenium complex trapped in the cage-line structure of a sol-gel-derived porous film on a declad section of multimode optical fiber. The sensors exhibit excellent performance using excitation from new high brightness blue LEDs and establish the viability of low-cost portable sensor devices based on the sol-gel process. The data presented for the intensity-based sensor were obtained using an all solid state excitation and detection system. Preliminary results obtained by application of the intensity- based sensor to dissolved oxygen measurement are also reported.

Paper Details

Date Published: 21 October 1994
PDF: 11 pages
Proc. SPIE 2293, Chemical, Biochemical, and Environmental Fiber Sensors VI, (21 October 1994); doi: 10.1117/12.190961
Show Author Affiliations
Brian D. MacCraith, Dublin City Univ. (Ireland)
Gerard O'Keeffe, Dublin City Univ. (Ireland)
Aisling K. McEvoy, Dublin City Univ. (Ireland)
Colette M. McDonagh, Dublin City Univ. (Ireland)

Published in SPIE Proceedings Vol. 2293:
Chemical, Biochemical, and Environmental Fiber Sensors VI
Robert A. Lieberman, Editor(s)

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