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Conferences > ACPC > 2021 > T1A > T1A.2

Direct Demodulation of Differential Phase from Φ-OTDR using Self-Homodyne Phase Diversity Receiver

Shuaiqi Liu, Feihong Yu, Weijie Xu, Huanhuan Liu, Perry Shum, Mang I Vai, and Liyang Shao

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Abstract

Differential Phase information of Φ-OTDR signal is directly extracted based on self-homodyning the Rayleigh backscattered light using a 90° optical hybrid receiver. The proposed method offers a cost-effective solution for quantitative distributed vibration sensing with low computation complexity.

© 2021 The Author(s)

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