ASN and Nokia hit 65Tbps transmission rates

18 October 2016 | James Pearce


Alcatel-Lucent Submarine Networks and Nokia Bell Labs have hit transmission capacity of more than 65Tbps in fibre lab tests, setting new records, they claim.

The trial used submarine grade dual band erbium doped fibre amplifiers to hit capacity of more than 65Tbps – more than 13,000 times the capacity that was available when the first undersea transatlantic system was installed in 1995.

The capacity is the equivalent of more than 10 million HDTV channels streamed simultaneously and will help deal with increased demand for capacity, speed and cost-effectiveness, according to ASN CTO Olivier Gautheron.

"This new record is the latest in a long series of achievements by Alcatel-Lucent Submarine Networks over the past 20 years, with breakthroughs that have transformed long distance data transmission,” he added. 

“It also underlines our strategic focus on R&D to raise the bar for undersea fibre-optic technology as our researchers continue to develop new solutions to help traditional and webscale operators cope with increasing requirements for speed, capacity and cost-effectiveness."

ASN used Bell Labs’ new Prohabilistic Constellation Shaping (PCS) modulation technology, which maximises the distance and capacity of high-speed transmission in optical networks. 

Traditional techniques transmit all constellations with the same occurrence, but PCS uses non-uniform transmission by reducing the occurrence of high power symbols. This, the firm claims, provides more resilience to noise and other impairments.

Marcus Weldon, president of Nokia Bell Labs & Nokia CTO, said: "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."