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12 April 2021 Chemical testing of lightweight longitudinal long fiber optic colorimetric chemical sensing platform
Richard M. Osgood III, Stephen Giardini, Sean Dinneen, Jin Ho Kim, Joseph Plumitallo, Silverio Johnson, Jimmy Xu
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Proceedings Volume 11749, Chemical, Biological, Radiological, Nuclear, and Explosives (CBRNE) Sensing XXII; 1174905 (2021) https://doi.org/10.1117/12.2586258
Event: SPIE Defense + Commercial Sensing, 2021, Online Only
Abstract
We report chemical warfare agent (CWA and) Toxic Industrial Compound (TIC) detection with colorimetric dyes, dispersed in porous polymer coatings on long (>1 m) fibers, for lightweight remote fiber-based sensing exploiting optical fibers’ quality, length, and low weight/power requirements. Illuminating LED light travels longitudinally within the polymer fiber core and evanescently interacts with the colorimetric dyes, dispersed in a porous polymer cladding. Reflectivity and absorption, measured by a precise COTS sensor, change with small amounts of TICs or CWAs. The cladding regenerates its signal after ~15 minutes. Minimum Detectable Concentration is below 1 ppm for ammonia. We report chemical testing at 2 different facilities against 3 CWAs, 2 agent-relevant TICs, and ammonia as a control, and field trials. We plan applications in remote sensing, reconnaissance, perimeter and airborne sensing, detecting other toxic materials, and manufacturing. We acknowledge funding from DTRA.
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Richard M. Osgood III, Stephen Giardini, Sean Dinneen, Jin Ho Kim, Joseph Plumitallo, Silverio Johnson, and Jimmy Xu "Chemical testing of lightweight longitudinal long fiber optic colorimetric chemical sensing platform", Proc. SPIE 11749, Chemical, Biological, Radiological, Nuclear, and Explosives (CBRNE) Sensing XXII, 1174905 (12 April 2021); https://doi.org/10.1117/12.2586258
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KEYWORDS
Industrial chemicals
Polymers
Biological and chemical sensing
Chemical weapons
Fiber optics
Fiber optics tests
Optical sensing
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