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