Title :
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
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;
Journal_Title :
Sensors Journal, IEEE
DOI :
10.1109/JSEN.2003.820348
