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Localization mechanisms and location methods of the disturbance sensor based on phase-sensitive OTDR

Authors
Journal
Optik - International Journal for Light and Electron Optics
0030-4026
Publisher
Elsevier
Volume
125
Issue
9
Identifiers
DOI: 10.1016/j.ijleo.2013.10.036
Keywords
  • Fiber-Optic Distributed Disturbance Sensor
  • Phase-Sensitive Optical Time-Domain Reflectometry (Otdr)
  • Model
  • Location Method
  • Rayleigh Scattering
Disciplines
  • Mathematics

Abstract

Abstract The mathematic models of the disturbance sensor based on phase-sensitive optical time-domain reflectometry (OTDR) are established. On the basis of the models, the localization mechanisms of the conventional location techniques for phase-sensitive OTDR are simulated. The simulation results indicate that the frequency characteristics of the backscattered signal at disturbance region are different from other regions. According to the results, a novel location method relied on power spectrum analysis is described. The experiment is then conducted over a monitored length of 9km with a spatial resolution of 100m, which demonstrates that the described location approach can significantly enhanced signal-to-noise ratio (SNR) to 19.4dB.

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