Title :
A New Fiber-Bragg-Grating Sensor Interrogation System Deploying Free-Spectral-Range-Matching Scheme With High Precision and Fast Detection Rate
Author :
Tsai, Patrick ; Sun, Fengguo ; Xiao, Gaozhi ; Zhang, Zhiyi ; Rahimi, Somayyeh ; Ban, Dayan
Author_Institution :
Waterloo Univ., Ottawa
Abstract :
A new method for fiber-Bragg-grating sensor interrogation and multiplexing is proposed and its operating features are investigated experimentally. This technique utilizes free-spectral-range-matched interrogation (FSRMI) employing a tunable scanning Fabry-Perot filter and a multichannel bandpass filter. An -channel FSRMI allows simultaneous scanning and thus improvement of detection speed by times compared to a nonfree-spectral-range-matched interrogation scheme. A 5-pm wavelength resolution has been obtained. This technique simultaneously scans the multiple transmission peaks and provides solutions to a wavelength-modulated distributed sensors and multisensor arrays with high sampling speed and wavelength accuracy.
Keywords :
Bragg gratings; band-pass filters; distributed sensors; fibre optic sensors; optical fibre filters; sensor arrays; fast detection rate; fiber Bragg grating sensor interrogation system; free spectral range matched interrogation; high precision rate; multichannel bandpass filter; multiple transmission peaks; multiplexing; multisensor arrays; tunable scanning Fabry-Perot filter; wavelength-modulated distributed sensors; Band pass filters; Bragg gratings; Councils; Fiber gratings; Holographic optical components; Optical fiber sensors; Optical filters; Optical interferometry; Sensor arrays; Sensor systems; Fiber-Bragg-grating (FBG) sensor interrogation; free-spectral-range (FSR)-matching scheme; multichannel bandpass filter; tunable scanning Fabry–PÉrot filter;
Journal_Title :
Photonics Technology Letters, IEEE
DOI :
10.1109/LPT.2007.915638
