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

Volume

27

Issue

7

fYear

2015

fDate

April1, 1 2015

Firstpage

713

Lastpage

716

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;

fLanguage

English

Journal_Title

Photonics Technology Letters, IEEE

Publisher

ieee

ISSN

1041-1135

Type

jour

DOI

10.1109/LPT.2015.2390251

Filename

7006665