Sensors 2012, 12(7), 8601-8639; doi:10.3390/s120708601

Recent Progress in Distributed Fiber Optic Sensors

Physics Department, University of Ottawa, Ottawa, ON K1N6N5, Canada
* Author to whom correspondence should be addressed.
Received: 1 May 2012; in revised form: 15 June 2012 / Accepted: 19 June 2012 / Published: 26 June 2012
(This article belongs to the Special Issue Optical Fiber Sensors)
PDF Full-text Download PDF Full-Text [542 KB, Updated Version, uploaded 23 July 2012 09:22 CEST]
The original version is still available [542 KB, uploaded 26 June 2012 10:35 CEST]
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.
Keywords: fiber optic sensors; brillouin scattering; Rayleigh scattering; Raman scattering; distributed sensors; birefringence; temperature; strain; vibration; optical time domain reflectrometer (OTDR); optical frequency domain reflectrometer (OFDR)

Article Statistics

Load and display the download statistics.

Citations to this Article

Cite This Article

MDPI and ACS Style

Bao, X.; Chen, L. Recent Progress in Distributed Fiber Optic Sensors. Sensors 2012, 12, 8601-8639.

AMA Style

Bao X, Chen L. Recent Progress in Distributed Fiber Optic Sensors. Sensors. 2012; 12(7):8601-8639.

Chicago/Turabian Style

Bao, Xiaoyi; Chen, Liang. 2012. "Recent Progress in Distributed Fiber Optic Sensors." Sensors 12, no. 7: 8601-8639.

Sensors EISSN 1424-8220 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert