Alcatel-Lucent Submarine Networks (ASN) and Nokia Bell Labs have achieved record transmission capacity over a 6,600 km single mode fiber.
The lab trial demonstrated a total 65 Tbps transmission using submarine grade dual band erbium doped fiber amplifiers, which will help extend the capability of transoceanic cable systems to meet increasing data traffic demand. The trial leveraged Bell Labs’ new Probabilistic Constellation Shaping (PCS) technology, a new modulation technique that maximizes the distance and capacity of high-speed transmission in optical networks. Unlike traditional techniques whereby all constellation symbols are transmitted with the same occurrence, PCS intelligently uses non-uniform transmission of constellation symbols by reducing the occurrence of high power symbols, thus providing more resilience to noise and other impairments, and the ability to dynamically adapt to changing conditions.
“The future digital existence where everyone, everything and every system and process is connected will require a massive increase in network capacity and the ability to dynamically optimize this capacity. Probabilistic Constellation Shaping extends the limits of current optical transmission by utilizing novel modulation techniques to dramatically improve the performance and capacity needed for the new digital era that will be enabled by the Future X Network,” stated Marcus Weldon, president of Nokia Bell Labs & Nokia CTO.
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