Vibration Sensing is the measurement of mechanical oscillations or dynamic motion in structures or environments using sensors that detect changes in displacement, velocity, or acceleration. In optical systems, vibration sensing is often implemented using fiber optic technologies such as distributed acoustic sensing, where vibrations induce phase or intensity changes in backscattered light. It is widely used for infrastructure monitoring, perimeter security, industrial diagnostics, and geophysical applications.
We report the first field study of the phase and polarization dynamics of deployed antiresonant hollow core fiber cable in a data center interconnect for real-world vibration sensing,revealing enhanced phase sensitivity and significantly faster polarization angular rate compared with standard single mode fibers.
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