Ultra-high-sensitivity two-dimensional bend sensor

G. A. Cranch, G. M. H. Flockhart, W. N. MacPherson, J. S. Barton, C. K. Kirkendall

Research output: Contribution to journalArticlepeer-review

23 Citations (Scopus)


A multicore fibre Fabry-Perot-based strain sensor interrogated with tandem interferometry for bend measurement is described. Curvature in two dimensions is obtained by measuring the difference in strain between three co-located low finesse Fabry-Perot interferometers formed in each core of the fibre by pairs of Bragg gratings. This sensor provides a responsivity enhancement of up to 30 times that of a previously reported fibre Bragg grating based sensor. Strain resolutions of 0.6 ne/Hz1/2 above 1 Hz are demonstrated, which corresponds to a curvature resolution of ~0.012 km-1/Hz 1/2. © The Institution of Engineering and Technology 2006.

Original languageEnglish
Pages (from-to)520-522
Number of pages3
JournalElectronics Letters
Issue number9
Publication statusPublished - 27 Apr 2006


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