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Real-Time Interrogation Technology for a Large-Scale Fiber-Ring Laser Sensor Array

Authors :
Xuefeng Chen
Xue Dong
Houjun Lv
Yunxin Hu
Xiujuan Yu
Xiangfei Chen
Shengchun Liu
Source :
IEEE Photonics Journal, Vol 9, Iss 2, Pp 1-9 (2017)
Publication Year :
2017
Publisher :
IEEE, 2017.

Abstract

A real-time interrogation technology for a large-scale fiber laser sensor array is proposed and experimentally investigated by employing a hybrid topological structure based on the wavelength- and frequency-division multiplexing techniques. In this system, a 2-D n × m sensor array is established by using a 1 × n coupler and n 1 × m couplers. All sensors are divided into n units by the 1 × n coupler. In each unit, there are m fiber-ring laser sensors with approximately the same wavelength and different beat frequencies due to different laser cavity lengths. Meanwhile, different units are characteristic of different operating wavelengths by splicing different fiber Bragg grating (FBG) as a reflector. Therefore, each sensor has a unique wavelength- and frequency-encoded information. All sensors can be interrogated by the combination of wavelength and frequency multiplexing technology. In the paper, a 4 × 4 sensor array is set up experimentally to verify the interrogation ability, and the sensing information of the strain and temperature has been successfully extracted. The experimental results show that the proposed interrogation system has the ability of real-time monitoring for a large-scale fiber laser sensor array.

Details

Language :
English
ISSN :
19430655
Volume :
9
Issue :
2
Database :
Directory of Open Access Journals
Journal :
IEEE Photonics Journal
Publication Type :
Academic Journal
Accession number :
edsdoj.31b9efeb9846a78fe65d7eb59496fe
Document Type :
article
Full Text :
https://doi.org/10.1109/JPHOT.2017.2687043