Distributed Acoustic Sensing (DAS) is a technology that converts standard optical fibers into an array of thousands of individual acoustic sensors. It allows for the continuous monitoring of acoustic signals along the entire length of the fiber optic cable. DAS systems are commonly used in various applications, including seismic monitoring, infrastructure monitoring, and security.


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.