NEC breaks world Album for spectral efficiency, close to Shannon Limitation


NEC has demonstrated a transmitting capacity of 34.9 terabits per second (Tbit/s) on a single optical fiber, within a distance greater than 6,300 km) This accomplishment divides up the spectral efficiency record for transoceanic transmission, and obtaining 8.3 bit/s/Hz working with the C-band spectrum. This can be really a 16.9% improvement over the former record. These effects are very near the Shannon limit, the basic midsize efficiency limitation of optical calling.
"Claude_Shannon_limit"Maximizing spectral efficiency is just one of the main goals in the design of submarine cable systems, empowering the highest possible power per fiber pair, while still cutting down the final gear price, energy and space ingestion. The demonstration of NEC's technologies will come inside of 0.5 decibels (dB) of the theoretical highest significance.


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