1 December 1994 Light-emitting-diode-based oxygen sensing using evanescent wave excitation of a dye-doped sol-gel coating
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Optical Engineering, 33(12), (1994). doi:10.1117/12.184360
Abstract
Two evanescent wave fiber optic sensors for oxygen are reported: one intensity based and the other based on phase fluorimetry. Both sensors employ the quenching by oxygen of the fluorescence from a ruthenium complex trapped in the cagelike 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 501-gel process.
Brian D. MacCraith, Gerard O'Keeffe, Aisling K. McEvoy, Colette M. McDonagh, John F. McGilp, Brendan O'Kelly, J. Des O'Mahony, Mark Cavanagh, "Light-emitting-diode-based oxygen sensing using evanescent wave excitation of a dye-doped sol-gel coating," Optical Engineering 33(12), (1 December 1994). http://dx.doi.org/10.1117/12.184360
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KEYWORDS
Oxygen

Sensors

Modulation

Luminescence

Phase shift keying

Ruthenium

Sol-gels

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