Seismic detection through state-of-polarization analysis in optical fiber networks

Hasan Awad; Fehmida Usmani; Emanuele Virgillito; Rudi Bratovich; Roberto Proietti; Stefano Straullu; Rosanna Pastorelli; Vittorio Curri

doi:10.1117/12.3007808

12 March 2024 Seismic detection through state-of-polarization analysis in optical fiber networks

Hasan Awad, Fehmida Usmani, Emanuele Virgillito, Rudi Bratovich, Roberto Proietti, Stefano Straullu, Rosanna Pastorelli, Vittorio Curri

Author Affiliations +

Proceedings Volume 12835, Optical Fibers and Sensors for Medical Diagnostics, Treatment, and Environmental Applications XXIV; 128350L (2024) https://doi.org/10.1117/12.3007808
Event: SPIE BiOS, 2024, San Francisco, California, United States

Abstract

The existing optical fiber terrestrial network can be leveraged to serve as a wide distributed network of sensors, especially to detect mechanical stresses as the optical signal polarization is significantly influenced by external disturbances. Exploiting this trend, paves the way for employing the optical fiber network in environmental sensing, like detecting earthquakes or tracking anthropic activities. The purpose is to examine the changes in the state of light polarization caused by birefringence induced by seismic events. Consequently, we have developed a Python-based Waveplate Model to track state of light polarization changes in buried optical fiber cables. This model integrates real ground motion data from a 4.9 magnitude earthquake that occurred southwest Marradi city in Italy, and converts it into strain values along the fiber cable. To further investigate the effects of this particular seismic activity, we propose a centralized smart grid fiber network approach based on a neural network model with an attention mechanism for earthquake early warnings. Along with the aforementioned Waveplate Model, numerous sets of polarization evolution were produced on two distinct sensing points with different distances from the epicenter in two different cities, enabling earthquake early detection upon P-wave arrivals that precede the earthquake’s destructive surface waves and allowing for a swift initiation of emergency plans including early warning alerts and earthquake countermeasures.

Conference Presentation

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

Citation Download Citation

Hasan Awad, Fehmida Usmani, Emanuele Virgillito, Rudi Bratovich, Roberto Proietti, Stefano Straullu, Rosanna Pastorelli, and Vittorio Curri "Seismic detection through state-of-polarization analysis in optical fiber networks", Proc. SPIE 12835, Optical Fibers and Sensors for Medical Diagnostics, Treatment, and Environmental Applications XXIV, 128350L (12 March 2024); https://doi.org/10.1117/12.3007808

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