title: Bend sensors with direction recognition based on long-period gratings written in D-shaped fiber.
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.
authors.affiliation: Photonics Research Group, Electronic Engineering, Aston University, Birmingham B4 7ET, UK. d.zhao@aston.ac.uk
authors.forename: Donghui
authors.initials: D
authors.lastname: Zhao
authors.forename: Xianfeng
authors.initials: X
authors.lastname: Chen
authors.forename: Kaiming
authors.initials: K
authors.lastname: Zhou
authors.forename: Lin
authors.initials: L
authors.lastname: Zhang
authors.forename: Ian
authors.initials: I
authors.lastname: Bennion
authors.forename: William N
authors.initials: WN
authors.lastname: MacPherson
authors.forename: James S
authors.initials: JS
authors.lastname: Barton
authors.forename: Julian D C
authors.initials: JD
authors.lastname: Jones