Long period fibre gratings for structural bend sensing
- 3 September 1998
- journal article
- Published by Institution of Engineering and Technology (IET) in Electronics Letters
- Vol. 34 (18) , 1773-1775
- https://doi.org/10.1049/el:19981237
Abstract
The authors examine the changes in wavelength and attenuation of long period fibre gratings subjected to bends with curvatures from 0 to 4.4 m–1. The wavelength change with curvature is nonlinear, with a projected minimum detectable curvature change of 2 × 10–3 m–1. The magnitude of the bend-induced wavelength shift depends on the rotation of the cylindrical fibre relative to the bending plane.Keywords
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