A Novel Method of Spectra Processing for Brillouin Optical Time Domain Reflectometry

A new method of Brillouin spectra post-processing, which could be applied in modern distributed optical sensors: Brillouin optical time domain analyzers/reflectometers (BOTDA/BOTDR), has been demonstrated. It operates by means of the correlation analysis performed with special technique («backward-c...

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Bibliographic Details
Published inFibers Vol. 8; no. 9; p. 60
Main Authors Barkov, Fedor L., Konstantinov, Yuri A., Krivosheev, Anton I.
Format Journal Article
LanguageEnglish
Published MDPI AG 01.09.2020
Subjects
BOTDA
brillouin spectra
correlation analysis
digital signal processing
distributed fiber optic sensors
optical fiber birefringence
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Summary:A new method of Brillouin spectra post-processing, which could be applied in modern distributed optical sensors: Brillouin optical time domain analyzers/reflectometers (BOTDA/BOTDR), has been demonstrated. It operates by means of the correlation analysis performed with special technique («backward-correlation»). It does not need any additional data for time or space averaging and operates with the single spectrum only. We have simulated the method accuracy dependence on signal-to-noise ratio (SNR) and other parameters. It is shown that the new method produces better results at low SNRs than conventional technique, based on finding of Brillouin spectrum maximum, do. These results are in a good agreement with the experiment. Finally, we have estimated the performance of the new method for its application in polarization-BOTDA set-up for a polarization maintaining (PM) fiber modal birefringence distributed study.
ISSN:2079-6439
2079-6439
DOI:10.3390/fib8090060