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Distributed Fiber-Optic Sensors for Vibration Detection.

Xin Liu1, Baoquan Jin2, Qing Bai3

  • 1Key Laboratory of Advanced Transducers and Intelligent Control Systems, Ministry of Education, Taiyuan University of Technology, No. 79 Yingzexi Street, Taiyuan 030024, China. liuxin0924@link.tyut.edu.cn.

Sensors (Basel, Switzerland)
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Summary
This summary is machine-generated.

Distributed fiber-optic vibration sensors detect vibrations by monitoring changes in light properties within the fiber. This review covers interferometric and backscattering technologies for applications like structural health monitoring.

Keywords:
backscattering-based sensing technologydistributed fiber-optic sensorinterferometric sensing technologyperimeter securitystructural health monitoringvibration detection

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Area of Science:

  • Photonics and Sensor Technology
  • Optical Engineering
  • Applied Physics

Background:

  • Distributed fiber-optic vibration sensors are crucial for monitoring external disturbances.
  • Vibrations alter optical parameters (intensity, phase, polarization, frequency) in sensing fibers.

Purpose of the Study:

  • To review various distributed fiber-optic vibration sensing technologies.
  • To present their operation principles and recent research.
  • To summarize their applications.

Main Methods:

  • Review of interferometric sensing (Sagnac, Mach-Zehnder, Michelson).
  • Review of backscattering-based sensing (phase-sensitive OTDR, polarization-OTDR, OFDR).
  • Inclusion of combined interferometric and backscattering techniques.

Main Results:

  • Detailed principles of diverse sensing technologies are presented.
  • Recent advancements and research efforts are highlighted.
  • Key applications identified in structural health monitoring and perimeter security.

Conclusions:

  • Distributed fiber-optic vibration sensors offer large-scale monitoring, concealment, flexibility, and EMI immunity.
  • These sensors demonstrate significant potential for numerous practical applications.