Two-dimensional bend sensing with a single, multi-core optical fibre

Paul M Blanchard, James G Burnett, G R G Erry, Alan Howard Greenaway, P Harrison, B Mangan, J C Knight, P St J Russell, M J Gander, Roy McBride, Julian David Clayton Jones

Research output: Contribution to journalArticlepeer-review

100 Citations (Scopus)


Measurement of two-dimensional bending in a structural element using intrinsic optical fibre strain gauges would normally require three sensors to be attached to, or embedded within, the structure. The same measurement can now be made using a single multi-core optical fibre, reducing deployment cost and increasing practicality. Fabrication of a novel three-core photonic crystal fibre is described. The ability of the fibre sensor to measure bend in two dimensions is demonstrated in the laboratory using interferometric interrogation at a single wavelength. Deployment of the sensor to measure the deformation of a bridge undergoing loading trials is described.

Original languageEnglish
Pages (from-to)132-140
Number of pages9
JournalSmart Materials and Structures
Issue number2
Publication statusPublished - Apr 2000


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