Researchers from NICT and Sumitomo Electric achieved a world record in optical fiber communications by transmitting 1.02 petabits per second over 1,808 kilometers using a 19-core optical fiber with standard cladding diameter. This breakthrough uses coupled multi-core technology where 19 cores share a common cladding, achieving the highest capacity-distance product of 1.86 exabits per second-km ever recorded. The system utilizes C-band and L-band wavelengths with optical amplification repeaters, representing a major advancement toward scalable, high-capacity networks for future telecommunications infrastructure.
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