Curvature sensor based on a Fabry-Perot interferometer

Catarina Monteiro; Marta S. Ferreira; Jens Kobelke; Kay Schuster; Jörg Bierlich; Orlando Frazão

doi:10.1117/12.2235215

30 May 2016 Curvature sensor based on a Fabry-Perot interferometer

Catarina Monteiro, Marta S. Ferreira, Jens Kobelke, Kay Schuster, Jörg Bierlich, Orlando Frazão

Proceedings Volume 9916, Sixth European Workshop on Optical Fibre Sensors; 991603 (2016) https://doi.org/10.1117/12.2235215
Event: Sixth European Workshop on Optical Fibre Sensors (EWOFS'2016), 2016, Limerick, Ireland

Abstract

A curvature sensor based on a Fabry-Perot interferometer is proposed. A capillary tube of silica is fusion spliced between two single mode fibers, producing a Fabry-Perot cavity. The light propagates in air, when passing through the capillary tube. Two different cavities are subjected to curvature and temperature. The cavity with shorter length shows insensitivity to both measurands. The larger cavity shows two operating regions for curvature measurement, where a linear response is shown, with a maximum sensitivity of 18.77pm/m^-1 for the high curvature radius range. When subjected to temperature, the sensing head produces a similar response for different curvature radius, with a sensitivity of 0.87pm/°C.

Citation Download Citation

Catarina Monteiro, Marta S. Ferreira, Jens Kobelke, Kay Schuster, Jörg Bierlich, and Orlando Frazão "Curvature sensor based on a Fabry-Perot interferometer", Proc. SPIE 9916, Sixth European Workshop on Optical Fibre Sensors, 991603 (30 May 2016); https://doi.org/10.1117/12.2235215

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