Title :
Bending Vector Sensor Based on a Sector-Shaped Long-Period Grating
Author :
Quan Zhou ; Weigang Zhang ; Lei Chen ; Zhiyong Bai ; Liyu Zhang ; Li Wang ; Biao Wang ; Tieyi Yan
Author_Institution :
Key Lab. of Opt. Inf. Sci. & Technol., Nankai Univ., Tianjin, China
Abstract :
A novel optical fiber grating vector bending sensor head is proposed. The asymmetric characteristics are embedded in the sensor head by tilting the grating planes at increasing angles, as moving away from the center grid of the structure. A high-frequency-CO2-laser is used to fabricate the sensor head. Due to the characteristics of the asymmetric structure, the bending sensitivity for the curvature range from -2 to 0 m-1 reaches 8.53 nm/ m-1, and for the curvature range from 0 to 2 m-1 reaches 2.82 nm/ m-1, respectively.
Keywords :
bending; carbon compounds; curvature measurement; diffraction gratings; fibre optic sensors; gas lasers; optical fibre fabrication; CO2; asymmetric characteristics; asymmetric structure; grating planes; high-frequency-CO2-laser; optical fiber grating vector bending sensor head; sector-shaped long-period grating; Fiber gratings; Gratings; Optical fiber sensors; Optical fibers; Refractive index; Sensitivity; Vectors; Bending vector sensor; interferometer; long-period grating;
Journal_Title :
Photonics Technology Letters, IEEE
DOI :
10.1109/LPT.2015.2390251
