Recent Progress in Distributed Fiber Optic Sensors

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ID: 110099
2012
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Abstract
Rayleigh, Brillouin and Raman scatterings in fibers result from the interaction of photons with local material characteristic features like density, temperature and strain. For example an acoustic/mechanical wave generates a dynamic density variation; such a variation may be affected by local temperature, strain, vibration and birefringence. By detecting changes in the amplitude, frequency and phase of light scattered along a fiber, one can realize a distributed fiber sensor for measuring localized temperature, strain, vibration and birefringence over lengths ranging from meters to one hundred kilometers. Such a measurement can be made in the time domain or frequency domain to resolve location information. With coherent detection of the scattered light one can observe changes in birefringence and beat length for fibers and devices. The progress on state of the art technology for sensing performance, in terms of spatial resolution and limitations on sensing length is reviewed. These distributed sensors can be used for disaster prevention in the civil structural monitoring of pipelines, bridges, dams and railroads. A sensor with centimeter spatial resolution and high precision measurement of temperature, strain, vibration and birefringence can find applications in aerospace smart structures, material processing, and the characterization of optical materials and devices.
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bao2012sensorsrecent Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors Xiaoyi Bao;Liang Chen;Bao, Xiaoyi;Chen, Liang;
Journal sensors
Year 2012
DOI
10.3390/s120708601
URL
https://www.mdpi.com/1424-8220/12/7/8601
Keywords
temperature strain vibration distributed sensors rayleigh scattering fiber optic sensors brillouin scattering raman scattering birefringence optical time domain reflectrometer (otdr) optical frequency domain reflectrometer (ofdr)

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