Distributed Temperature Sensor Interrogator Based on Polarization-Sensitive Reflectometry

In this paper, a polarization-sensitive reflectometry technique has been investigated in order to serve as an interrogating device in distributed sensing applications. As the sensing fiber has a beat length of about a few centimeters, a high-resolution reflectometer was required. A coherent optical...

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Bibliographic Details
Published in:IEEE sensors journal 2009-09, Vol.9 (9), p.1125-1129
Main Authors: Crunelle, C., Legre, M., Wuilpart, M., Megret, P., Gisin, N.
Format: Article
Language:English
Subjects:
Backscattering
Beat length
Calibration
Coherence
coherent optical frequency-domain reflectometry (OFDR)
Detection
Devices
distributed temperature sensing
Fiber nonlinear optics
Fibers
Nonlinear optics
Optical fiber devices
Optical fiber polarization
Optical fiber sensors
Optical sensors
optical time-domain reflectometry (OTDR)
polarization
Reflectometers
Reflectometry
Temperature dependence
Temperature sensors
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Description
Summary:In this paper, a polarization-sensitive reflectometry technique has been investigated in order to serve as an interrogating device in distributed sensing applications. As the sensing fiber has a beat length of about a few centimeters, a high-resolution reflectometer was required. A coherent optical frequency-domain reflectometer (OFDR) was used from this perspective. The principle is based on the linear dependence of fiber beat length on temperature. The reported experimental results detail the calibration method and discuss the features of the interrogating device in terms of temperature threshold and spatial resolution. The proposed system, exploiting the Rayleigh backscatter signal, offers an interesting alternative to existing systems, mainly based on nonlinear effects.
ISSN:1530-437X
1558-1748
DOI:10.1109/JSEN.2009.2026525