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Proceedings Paper

Transversely loaded fibre Bragg grating for pressure measurements
Author(s): Ricardo Correia; Edmon Chehura; Stephen W. James; Ralph P. Tatam
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Paper 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.

Paper Details

Date Published: 2 July 2007
PDF: 4 pages
Proc. SPIE 6619, Third European Workshop on Optical Fibre Sensors, 66191A (2 July 2007); doi: 10.1117/12.738391
Show Author Affiliations
Ricardo Correia, Cranfield Univ. (United Kingdom)
Edmon Chehura, Cranfield Univ. (United Kingdom)
Stephen W. James, Cranfield Univ. (United Kingdom)
Ralph P. Tatam, Cranfield Univ. (United Kingdom)


Published in SPIE Proceedings Vol. 6619:
Third European Workshop on Optical Fibre Sensors

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