Temperature- and Strain-Independent Curvature Sensor Based on Multimode Interference

• Type: Article in International Conference Proceedings Book
• Date: 2010

Authors

Susana Silva (Author) FCUP; Frazao, O (Author) FCUP; Ferreira, LA (Author) Other; Araujo, FM (Author) Other; Malcata, FX (Author) Other; Santos, JL (Author) FCUP

Conference proceedings International

Title: FOURTH EUROPEAN WORKSHOP ON OPTICAL FIBRE SENSORS

Fourth European Workshop on Optical Fibre Sensors

Porto, PORTUGAL, SEP 08-10, 2010

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ISI Web of Knowledge - 0 Citations

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Scopus - 2 Citations

Scientific classification

FOS: Engineering and technology > Electrical engineering, Electronic engineering, Information engineering

Other information

Authenticus ID: P-003-AZZ

DOI: 10.1117/12.865028

Abstract (EN): This work describes a fibre optic sensing structure that is sensitive to curvature, and features a low temperature- and strain cross-sensitivity. It is based on multimode interference, and relies on a single mode - step index multimode - single mode fibre configuration. It was observed that the transmitted optical power in such layout becomes highly sensitive to the wavelength of operation and to the length of the multimode fibre. The optical spectrum entertains two dominant loss bands, at wavelengths that have similar responses both to temperature and strain, and different responses to curvature. Based on this result, an interrogation approach is proposed that permits substantial sensitivity to curvature (8.7 +/- 0.1 nm.m) and residual sensitivities to temperature and strain (0.3 +/- 0.1 pm/degrees C and -0.06 +/- 0.01 pm/mu epsilon, respectively).

Language: English

Type (Professor's evaluation): Scientific