23 April 2010 Intrinsic Fabry-Pérot interferometric (IFPI) fiber pressure sensor
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An optical fiber Single/Multi-/Single-mode Intrinsic Fabry-Pérot Interferometer (SMS-IFPI) pressure sensor has been demonstrated using a silica tube-based pressure transducer hermetically sealed by thermal fusion bonding. The sensor, made entirely of fused silica, contains an IFPI strain sensor enclosed by a CO2 laser-bonded outer tube. A sensor prototype is constructed and demonstrated for single point pressure sensing at high temperature (600°C), with temperature compensation achieved through co-location of an SMS-IFPI temperature sensor. The inline geometry and low transmission loss of the SMS-IFPI sensor makes it suitable for frequency division multiplexing (FDM) in a single fiber branch. In future work, we envision multiplexing of up to eight such IFPI pressure sensors along a single fiber branch for quasi-distributed pressure measurement.
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Cheng Ma, Cheng Ma, Ning Wang, Ning Wang, Evan M. Lally, Evan M. Lally, Anbo Wang, Anbo Wang, } "Intrinsic Fabry-Pérot interferometric (IFPI) fiber pressure sensor", Proc. SPIE 7677, Fiber Optic Sensors and Applications VII, 76770T (23 April 2010); doi: 10.1117/12.851906; https://doi.org/10.1117/12.851906

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