13 May 2013 Miniature low-cost extrinsic Fabry-Perot interferometer for low-pressure detection
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A miniature optical fiber pressure sensor based on extrinsic Fabry-Perot interferometer (EFPI) is presented. The sensing probe has 0.2 mm outer diameter, and is based on an all-silica biocompatible structure, with a pressure sensitivity <1 nm/kPa. The probe is complemented by a fiber Bragg grating (FBG), in proximity of the EFPI tip, for temperature compensation. Interrogation is based on a low-cost white-light setup, whereas several pressure detection algorithms have been developed. Preliminary experimental validation and medical applications are discussed.
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Sven Poeggel, Sven Poeggel, Daniele Tosi, Daniele Tosi, Gabriel Leen, Gabriel Leen, Elfed Lewis, Elfed Lewis, } "Miniature low-cost extrinsic Fabry-Perot interferometer for low-pressure detection", Proc. SPIE 8788, Optical Measurement Systems for Industrial Inspection VIII, 878811 (13 May 2013); doi: 10.1117/12.2019799; https://doi.org/10.1117/12.2019799

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