NTT Network Innovation Labs conducts pioneering research in networking technologies, AI, and cybersecurity. It contributes to Japan’s leadership in digital infrastructure and intelligent networks. NEC Labs America works with NTT Network Innovation Labs on 6G system design, AI-driven resource allocation, and photonic switching. Please read about our latest news and collaborative publications with NTT Network Innovation Labs.

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4D Optical Link Tomography: First Field Demonstration of Autonomous Transponder Capable of Distance, Time, Frequency, and Polarization-Resolved Monitoring

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.