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https://doi.org/10.1049/el:20060731
Copy DOIJournal: Electronics Letters | Publication Date: Apr 27, 2006 |
Citations: 23 | License type: mit |
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 nɛ/Hz1/2 above 1 Hz are demonstrated, which corresponds to a curvature resolution of ∼0.012 km−1/Hz1/2.
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