Transversely loaded fibre Bragg grating for pressure measurements

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

doi:10.1117/12.738391

2 July 2007 Transversely loaded fibre Bragg grating for pressure measurements

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

Proceedings Volume 6619, Third European Workshop on Optical Fibre Sensors; 66191A (2007) https://doi.org/10.1117/12.738391
Event: Third European Workshop on Optical Fibre Sensors, 2007, Napoli, Italy

Abstract

A fibre Bragg grating (FBG) pressure sensor, based upon the transverse loading of half its length, is proposed and demonstrated. When a transverse load is applied to half of the length of an FBG, a second Bragg peak is generated in the reflection spectrum, which separates from the initial Bragg peak. The new peak exhibits a red shift in wavelength as the load is increased. A new data analysis technique, which improves the minimum detectable pressure is discussed. A normalised pressure sensitivity of 5.73x10^-3 ± 5.23x10^-5 MPa^-1 was obtained. The technique offers the opportunity to measure independently pressure and temperature using a single FBG sensor element.

Citation Download Citation

Ricardo Correia, Edmon Chehura, Stephen W. James, and Ralph P. Tatam "Transversely loaded fibre Bragg grating for pressure measurements", Proc. SPIE 6619, Third European Workshop on Optical Fibre Sensors, 66191A (2 July 2007); https://doi.org/10.1117/12.738391

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