Simultaneous bend and temperature sensor using tilted FBG

C. Caucheteur; K. Chah; F. Lhomme; M. Blondel; Patrice Megret

doi:10.1117/12.623421

23 May 2005 Simultaneous bend and temperature sensor using tilted FBG

C. Caucheteur, K. Chah, F. Lhomme, M. Blondel, Patrice Megret

Proceedings Volume 5855, 17th International Conference on Optical Fibre Sensors; (2005) https://doi.org/10.1117/12.623421
Event: 17th International Conference on Optical Fibre Sensors, 2005, Bruges, Belgium

Abstract

We propose a simple, very reliable and fast optical sensor based on a tilted fiber Bragg grating for the simultaneous measurement of temperature and macro bending. The transmitted spectrum of a tilted Bragg grating is composed of numerous discrete dips which have two distinct origins: the dip at the longest wavelength comes from the self coupling of the core mode while the others are due to the backward coupling with the cladding modes. We apply a different demodulation technique to each of these two contributions in order to realize a dual sensor. This sensor allows the detection of small curvatures and provides a good accuracy.

Citation Download Citation

C. Caucheteur, K. Chah, F. Lhomme, M. Blondel, and Patrice Megret "Simultaneous bend and temperature sensor using tilted FBG", Proc. SPIE 5855, 17th International Conference on Optical Fibre Sensors, (23 May 2005); https://doi.org/10.1117/12.623421

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