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

Fiber Bragg gratings

Temperature metrology

Sensors

Demodulation

Temperature sensors

Optical fibers

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