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arxiv: 2606.21905 · v1 · pith:B3HCBOSVnew · submitted 2026-06-20 · ⚛️ physics.optics · physics.geo-ph

Per-Span Microwave Frequency Fiber Interferometry in Subsea Cables for Scalable Deep-Ocean Geophysical Monitoring

classification ⚛️ physics.optics physics.geo-ph
keywords monitoringfrequencyinterferometrymicrowaveper-spansubseaapproachcable
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We demonstrate low-cost microwave frequency fibre interferometry for per-span monitoring of a 1,770 km operational subsea cable connecting Ireland and Iceland. Over four months, this approach successfully resolved tidal variations, storms, and teleseismic earthquakes, highlighting its potential for large-scale, cost-effective ocean monitoring.

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