Journal
23RD INTERNATIONAL CONFERENCE ON OPTICAL FIBRE SENSORS
Volume 9157, Issue -, Pages -Publisher
SPIE-INT SOC OPTICAL ENGINEERING
DOI: 10.1117/12.2059273
Keywords
Polymer optical fiber; PMMA; fiber Bragg grating; water activity; equilibrium relative humidity
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Funding
- European Union Seventh Framework Programme [FP7/2007-2013, 314032]
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Poly(methyl methacrylate) (PMMA) based polymer optical fiber Bragg gratings have been used for measuring water activity of aviation fuel. Jet A-1 samples with water content ranging from 100% ERH (wet fuel) to 10 ppm (dried fuel), have been conditioned and calibrated for measurement. The PMMA based optical fiber grating exhibits consistent response and a good sensitivity of 59 +/- 3pm/ppm (water content in mass). This water activity measurement allows PMMA based optical fiber gratings to detect very tiny amounts of water in fuels that have a low water saturation point, potentially giving early warning of unsafe operation of a fuel system.
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