DAS (Distributed Acoustic Sensing) employs fiber optic cables to detect and monitor acoustic signals over long distances. By leveraging light scattering properties, DAS converts optical signals into acoustic data, enabling real-time monitoring of vibrations and sounds along the fiber. This technology is widely used in applications such as structural health monitoring, environmental sensing, and security.

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Long Reach Fibre Optic Distributed Acoustic Sensing using Enhanced Scattering Fibre

We report significant noise reduction in distributed acoustic sensing (DAS) link using enhanced-scatter fibre (ESF). The longest reach of 195km DAS link without inline amplifications is also demonstrated. We further present demonstration of simultaneous fibre-optic sensing and 400Gb/s data transmissions over 195km fibre using ESF.