Polarization fading suppression in distributed interferometric sensing by matched interference between polarization-switched pulses

A polarization fading suppression technique is proposed for distributed interferometric sensing systems, based on matched interference between polarization switched pulses. For each individual sensor, two sets of interferometric outputs are obtained, one corresponding to the interference between two...

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Bibliographic Details
Published inOptics express Vol. 30; no. 11; pp. 19705 - 19715
Main Authors Fu, Xuelei, Deng, Zhenyu, Wei, Qin, Li, Zhengying
Format Journal Article
LanguageEnglish
Published 23.05.2022
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Summary:A polarization fading suppression technique is proposed for distributed interferometric sensing systems, based on matched interference between polarization switched pulses. For each individual sensor, two sets of interferometric outputs are obtained, one corresponding to the interference between two pulses with initially parallel polarization, the other corresponding to that between two pulses with initially orthogonal polarizations. As such, at least one output presents visibility no less than 2 / 2 . By selecting the one with higher visibility for demodulation, the influence of polarization fading can be suppressed significantly, leading to distributed acoustic sensing with notably improved robustness and reliability.
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ISSN:1094-4087
1094-4087
DOI:10.1364/OE.459951