Research on detection and demodulation of external acoustic signals of sea cable based on distributed fiber optic sensing technology

Xuang Sun

doi:10.1117/12.3033915

5 July 2024 Research on detection and demodulation of external acoustic signals of sea cable based on distributed fiber optic sensing technology

Xuang Sun

Author Affiliations +

Proceedings Volume 13183, International Conference on Optoelectronic Information and Functional Materials (OIFM 2024); 131831I (2024) https://doi.org/10.1117/12.3033915
Event: The 3rd International Conference on Optoelectronic Information and Functional Materials (OIFM 2024), 2024, Wuhan, China

Abstract

The demodulation and reproduction of external vibration signals in submarine cables have broad prospects for practical engineering applications [1]. Based on the phenomenon of Rayleigh scattering, Phase-Sensitive Optical Time Domain Reflectometry (Φ-OTDR) serves as a type of distributed fiber sensing technology, widely applied in various fields due to its advantages of long monitoring distance, high sensitivity, and resistance to electromagnetic interference. This paper demonstrates the design of a simple and low-cost demodulation system for audio vibration signals directly monitored by Φ-OTDR. In the experimental setup, the fiber under test is wound around the outer surface of a polypropylene tube. Music and voice signals are played through speakers to the fiber under test, proving that this system can reproduce multifrequency external vibration signals over a transmission distance of 50 km with a spatial resolution of 5 meters. This system is suitable for long-distance monitoring of external vibration signals.

(2024) Published by SPIE. Downloading of the abstract is permitted for personal use only.

Citation Download Citation

Xuang Sun "Research on detection and demodulation of external acoustic signals of sea cable based on distributed fiber optic sensing technology", Proc. SPIE 13183, International Conference on Optoelectronic Information and Functional Materials (OIFM 2024), 131831I (5 July 2024); https://doi.org/10.1117/12.3033915

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