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Fast distributed temperature sensing using Brillouin beat spectrum of large effective area fiber (LEAF)
Shahna M. Haneef, P. P. Prasanth, Bhargav Somepalli, ,
Published in SPIE
2014
Volume: 9157
   
Abstract
We investigate the temperature dependence of the beat spectra of stimulated Brillouin scattering from a large effective area fiber (LEAF) in an Optical Time Domain Reflectometry (OTDR) configuration. The multiple gain peaks inherent to the design of this fiber undergo homodyning at the receiver and the amplitude of one of the beat tones is monitored as a function of temperature for a 4 km long fiber. Contrary to previous reports, the beat signal of the first two peaks is found to be decreasing with temperature. The above measurement is performed within 4 ms, thus opening the possibility of dynamic measurement of temperature and strain. © 2014 SPIE.
About the journal
JournalData powered by TypesetProceedings of SPIE - The International Society for Optical Engineering
PublisherData powered by TypesetSPIE
ISSN0277786X
Open AccessNo
Concepts (12)
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    BRILLOUIN SCATTERING
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    Fibers
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    Optical fibers
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    BEAT SIGNALS
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    BRILLOUIN
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    DISTRIBUTED FIBER SENSOR
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    Distributed temperature sensing
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    Dynamic measurement
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    LARGE EFFECTIVE AREA FIBER
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    OPTICAL TIME DOMAIN REFLECTOMETRY
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    Temperature dependence
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    Temperature sensors