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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Wei Zhang ; David J. Webb ; Mark Carpenter and Colleen Williams
Measuring water activity of aviation fuel using a polymer optical fiber Bragg grating
", Proc. SPIE 9157, 23rd International Conference on Optical Fibre Sensors, 91574V (June 2, 2014); doi:10.1117/12.2059273; http://dx.doi.org/10.1117/12.2059273