The modern telecommunications infrastructure relies heavily on widely deployed optical fibre networks which serve as its cornerstone. Strains in the fibres are caused by mechanical forces from various sources of ambient vibrations such as human activities and seismic movements. This results in phase shifts in the light that travels through the fibres. Consequently, these phase shifts can be measured across the entire fibre, providing information about the initial vibration events, which makes them an ideal candidate for distributed seismic sensing.
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