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DSS2015-final-lr

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WEDNESDAY 22 APRILUltra-high temperature fiber optical chemical sensors based onnano-porous metal oxidesPAPER 9467-54 · 4/22/2015 · 3:30 pmAuthor(s): Kevin P. Chen, Univ. of Pittsburgh (USA), et al.Conference 9467: Micro- and Nanotechnology Sensors, Systems, andApplications VIISESSION 10: Novel Harsh Environment Sensors for Energy Applications: JointSession with Conferences 9467 and 9491This paper presents fiber optical gas sensors based on nano-porous metal oxidefunctional materials for high-temperature energy applications. A solution-basedapproach was used to produce nano-porous functional metal oxide and theirdopant variants as sensing films, which was integrated on high-temperature stableFBGs in D-shaped silica fibers and sapphire fibers. The Bragg grating peaks wereused to monitor the refractive index change and optical absorption loss due to theredox reaction between Pd-doped TiO 2 and hydrogen from the room temperatureto 800C. The experimental results show the sensor’s response is reversible forhydrogen concentration between 0.1 vol.% to 5 vol. %. The response time of thehydrogen sensor is

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