Multi-Parameter Sensing refers to the capability of a commercial transponder to simultaneously measure and monitor multiple aspects of a communication link’s quality. Specifically, this involves resolving and tracking parameters across four dimensions: distance, time, frequency, and polarization.
We report the first field demonstration of 4D link tomography using a commercial transponder, which offers distance, time, frequency, and polarization-resolved monitoring. This scheme enables autonomous transponders that identify locations of multiple QoT degradation causes.
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