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Polarization-Insensitive Dynamic BOTDA Based on Direct-Detection OFDM

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Abstract

A polarization-insensitive Brillouin optical time domain analyzer (BOTDA) based on intensity-modulated direct-detection (IM-DD) orthogonal frequency division multiplexing (OFDM) is proposed and experimentally characterized. A polarization-multiplexed pump signal is used for polarization diversity of the stimulated Brillouin scattering, while an OFDM probe signal is used for single-shot sensing. Our experiments showed that the proposed scheme suppressed the gain fluctuation by 2.5 times.

© 2021 The Author(s)

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