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Characterization of the Noise Induced by Stimulated Brillouin Scattering in Distributed Sensing

Kadum, Jaffar Emad ORCID; Feng, Cheng ORCID; Schneider, Thomas ORCID

The excess noise due to stimulated Brillouin scattering (SBS) in gain and loss-based Brillouin optical time-domain analyzers (BOTDA) has been investigated theoretically and experimentally for the first time to the best of our knowledge. This investigation provides a full insight to the SBS-induced noise distribution, which mainly comes from phase-to-intensity conversion noise and the beating noise between the probe wave and spontaneous Brillouin scattering. A complete theoretical model, which is in good agreement with the experimental results, is presented to describe the noise. The results show that a loss-based BOTDA setup gives a better noise performance than a gain-based one in both time and frequency domain. The SBS-induced noise has been characterized in dependence on the pump and probe power and the spatial resolution.

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Kadum, J.E., Feng, C., Schneider, T., 2020. Characterization of the Noise Induced by Stimulated Brillouin Scattering in Distributed Sensing. https://doi.org/10.3390/s20154311
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