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

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

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 <italic>n</italic> &#...

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Bibliographic Details
Main Authors: Xuefeng Chen, Xue Dong, Houjun Lv, Yunxin Hu, Xiujuan Yu, Xiangfei Chen, Shengchun Liu
Format: Article
Language:English
Published: IEEE 2017-01-01
Series:IEEE Photonics Journal
Subjects:
Fiber laser sensor
beat frequency
interrogation technology
frequency/wavelength division multiplexing.
Online Access:https://ieeexplore.ieee.org/document/7886325/
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Summary: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 <italic>n</italic> &#x00D7; <italic>m</italic> sensor array is established by using a 1 &#x00D7; <italic>n</italic> coupler and <italic>n</italic> 1 &#x00D7; <italic>m</italic> couplers. All sensors are divided into <italic>n</italic> units by the 1 &#x00D7; <italic>n</italic> coupler. In each unit, there are <italic>m </italic> 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 &#x00D7; 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.
ISSN:1943-0655

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