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Bend measurement using Bragg gratings in multicore fibre

Gander, MJ and Flockhart, GMH and MacPherson, WN and McBride, R and Jones, JDC and Zhang, L and Bennion, I and Blanchard, PM and Burnett, JG and Greenaway, AH (2000) Bend measurement using Bragg gratings in multicore fibre. In: 14th International Conference on Optical Fiber Sensors. Proceedings of the Society of Photo-Optical Instrumentation Engineers (SPIE) . SPIE, Bellingham, pp. 720-723.

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Abstract

We describe the measurements of curvature made using Bragg gratings written in separate cores of a multicore optical fibre. The gratings act as independent, but isothermal, strain gauges. Thus the difference in Bragg wavelength between the gratings provides a measurement of local curvature.