Exploiting nonreciprocity in BOTDA systems

In this Letter, we present and demonstrate a novel technique for distributed measurements in Brillouin optical time-domain analysis based on the use of the nonlinear phase-shift induced by stimulated Brillouin scattering. Employing a Sagnac interferometer (SI), the position-resolved Brillouin phase-...

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Bibliographic Details
Published in:Optics letters 2015-05, Vol.40 (10), p.2193-2196
Main Authors: Lopez-Gil, A, Angulo-Vinuesa, X, Dominguez-Lopez, A, Martin-Lopez, S, Gonzalez-Herraez, M
Format: Article
Language:English
Subjects:
Brillouin zone
Computer simulation
Filtering
Filtration
Interferometers
Optical fibers
Proposals
Time domain analysis
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Summary:In this Letter, we present and demonstrate a novel technique for distributed measurements in Brillouin optical time-domain analysis based on the use of the nonlinear phase-shift induced by stimulated Brillouin scattering. Employing a Sagnac interferometer (SI), the position-resolved Brillouin phase-shift spectrum (BPS) along the fiber can be obtained, benefiting from the sensitivity to nonreciprocal phase-shifts of the SI scheme. This proposal simplifies the existing methods to retrieve the BPS distribution along an optical fiber since phase modulation, filtering, and high-bandwidth detectors are not required. The fundamentals of the technique are described theoretically and validated through numerical simulations and experimental measurements.
ISSN:0146-9592
1539-4794
DOI:10.1364/OL.40.002193