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2016-12-14 - Travail avec promoteur/Doctorat - Anglais - 195 page(s)

Musin Frédéric, "few-mode interferometric fiber optic sensor", Wuilpart Marc (p) , soutenue le 2016-12-14

  • Codes CREF : Capteurs et périphériques (DI2563), Sciences de l'ingénieur (DI2000), Optique des fibres (électromagnétisme) (DI1252), Métrologie (DI2160)
  • Jury : Moiny Francis (p) , villatoro J., Kacic D., De Jaeger Emmanuel, Mégret Patrice , Moeyaert Véronique , Lobry Jacques , Hennuy Blandine
  • Unités de recherche UMONS : Electromagnétisme et Télécommunications (F108)
  • Instituts UMONS : Institut de Recherche en Science et Ingénierie des Matériaux (Matériaux)

Abstract(s) :

(Anglais) Commercial solutions for distributed fiber optic temperature sensing mainly rely on Brillouin and Raman scatterings. Suh systems require complex optical equipment based on wavelength detection like spectrum analyzer, filters or tunable lasers. Their high cost prevents to disseminate the technology over a large geographical area and limits their application to high priority infrastructures. In response to these limitations, a novel fiber optic interferometric temperature variation sensor is proposed in the frame of this thesis. The basic principle of the sensor consists in the image processing of an interference pattern at the output of an optical fiber interrogated by a laser. The analysis of the dynamics of the pattern leads to the measurement of the spatially integrated temperature variation of the fiber. This sensor was successfully used in the electricity transport domain for overheating joint detection, in the gas transport domain fo leak detection and in the fire safety domain.