Simultaneous independent measurement of temperature and strain using a tilted fibre Bragg grating

Edmon Chehura; Stephen W. James; Ralph P. Tatam

doi:10.1117/12.738371

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2 July 2007 Simultaneous independent measurement of temperature and strain using a tilted fibre Bragg grating

Edmon Chehura, Stephen W. James, Ralph P. Tatam

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Proceedings Volume 6619, Third European Workshop on Optical Fibre Sensors; 66190I (2007) https://doi.org/10.1117/12.738371
Event: Third European Workshop on Optical Fibre Sensors, 2007, Napoli, Italy

Abstract

A single fibre Bragg grating is used to discriminate between temperature and strain by exploiting the core-cladding mode coupling of a tilted fibre Bragg grating (TFBG). The core and cladding modes exhibit different thermal sensivities, while the strain sensivities are approximately equal. Monitoring the core-core mode coupling resonance and the core-cladding mode coupling resonance within the spectrum of a single TFBG allows the separation of the temperature and strain induced wavelength shifts.

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Edmon Chehura, Stephen W. James, and Ralph P. Tatam "Simultaneous independent measurement of temperature and strain using a tilted fibre Bragg grating", Proc. SPIE 6619, Third European Workshop on Optical Fibre Sensors, 66190I (2 July 2007); https://doi.org/10.1117/12.738371

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