Bend sensors with direction recognition based on long-period gratings written in D-shaped fibre

Abstract

The curvature- or bend-sensing response of long-period gratings (LPGs) UV inscribed in D-shaped fiber has been investigated experimentally. Strong fiber-orientation dependence of the spectral response when such LPGs are subjected to bending at different directions has been observed and is shown to form the basis for a new class of single-device sensor with vector-sensing capability. Potential applications utilizing the linear response and unique bend-orientation characteristics of the devices are discussed.

Uncontrolled Keywords: curvature response, bend-sensing response, long-period gratings, LPGs, UV inscribed in D-shaped fiber, fiber-orientation dependence, spectral respons, single-device sensor, vector-sensing capability, linear response, unique bend-orientation
Published Date: 2004-10
Authors: Zhao, Donghui
Chen, Xianfeng F.
Zhou, Kaiming
Zhang, Lin
Bennion, Ian
MacPherson, William N.
Barton, James S.
Jones, Julian D.C.

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