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A Modification of the Backward Correlation Method for the Brillouin Frequency Shift Accurate Extraction

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Abstract—

An improved method for extracting the Brillouin frequency shift in postprocessing of a given Brillouin gain spectrum is presented. Modification of the method made it possible to expand the boundaries of its applicability to the region of noisy spectra with a signal-to-noise ratio (SNR) below 0 dB. The modified method can be successfully used in distributed fiber-optic sensors operating on the Brillouin scattering principle, especially in long-distance sensing lines.

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ACKNOWLEDGMENTS

We are grateful to A.I. Krivosheev for fruitful discussions and A.R. Davydov for his help in conducting statistical calculations when revealing the law of distribution of the noise spectral component.

Funding

This study was supported by the State Contract no. AAAA-A19-119042590085-2.

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Authors and Affiliations

  1. Perm Federal Research Center, Ural Branch, Russian Academy of Sciences, 614990, Perm, Russia

    F. L. Barkov & Yu. A. Konstantinov

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  1. F. L. Barkov
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  2. Yu. A. Konstantinov
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Correspondence to F. L. Barkov.

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The authors declare that they have no conflicts of interest.

Additional information

Translated by A. Seferov

International Conference “Optical Reflectometry, Metrology, & Sensing,” Russia, Perm, May 24–26, 2023.

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Barkov, F.L., Konstantinov, Y.A. A Modification of the Backward Correlation Method for the Brillouin Frequency Shift Accurate Extraction. Instrum Exp Tech 66, 753–760 (2023). https://doi.org/10.1134/S0020441223050044

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  • DOI: https://doi.org/10.1134/S0020441223050044

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