Fiber Bragg grating sensor interrogation using chirped fiber grating-based Sagnac loop

Author

Zhao, Donghui ; Shu, Xuewen ; Lai, Yicheng ; Zhang, Lin ; Bennion, Ian

Author_Institution

Photonics Res. Group, Aston Univ., Birmingham, UK

Volume

3

Issue

6

fYear

2003

Firstpage

734

Lastpage

738

Abstract

We have investigated numerically and experimentally a fiber Bragg grating (FBG) sensor interrogation scheme utilizing a linear chirped grating-based Sagnac loop as a wavelength-dependent receiver. The scheme is suitable for both static and dynamic sensor interrogation with advantages of stable and linear readout response and easily-adjustable sensing resolution and dynamic range. Static and dynamic strain resolutions as high as ± 4.2 με and 0.406 με/√ Hz have been demonstrated using this scheme.

Keywords

Bragg gratings; Sagnac interferometers; fibre optic sensors; FBG sensor; Sagnac loop; chirped fiber grating; dynamic range; dynamic sensor interrogation; dynamic strain resolutio; easily-adjustable sensing resolution; fiber Bragg grating; linear chirped grating; linear readout response; stable readout response; static sensor interrogation; static strain resolutions; wavelength-dependent receiver; Bragg gratings; Capacitive sensors; Chirp; Fiber gratings; Optical fiber sensors; Optical filters; Optical receivers; Sagnac interferometers; Strain measurement; Temperature sensors;

fLanguage

English

Journal_Title

Sensors Journal, IEEE

Publisher

ieee

ISSN

1530-437X

Type

jour

DOI

10.1109/JSEN.2003.820348

Filename

1254548