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Companies use new modulation technique to improve spectral efficiency of optical fibre.
Deutsche Telekom, Nokia Bell Labs, and the Technical University of Munich on Friday achieved a 1-Tbps transmission rate over fibre in a field trial of a new modulation technique.
1-Tbps is close to the theoretical maximum transfer rate of a fibre channel, referred to as the Shannon Limit, explained Nokia.
"To guarantee a high customer experience for future services we need optical transmissions with increased capacities, reach and flexibility over deployed fibre infrastructures," said Deutsche Telekom CTO Bruno Jacobfeuerborn, in a statement.
To reach the high data rate, the companies used a new modulation technique called Probabilistic Constellation Shaping (PCS), which has the effect of transmitting signals that are more resilient to noise and other impairments, enabling networks to support even faster connection speeds.
Nokia Bell Labs claimed that Friday’s demonstration represents a key milestone that could extend te future use of optical networks.
"Future optical networks not only need to support orders of magnitude higher capacity, but also the ability to dynamically adapt to channel conditions and traffic demand," said Marcus Weldon, Nokia CTO and president of Nokia Bell Labs. "
"Probabilistic Constellation Shaping offers great benefits to service providers and enterprises by enabling optical networks to operate closer to the Shannon Limit to support massive data centre interconnectivity and provide the flexibility and performance required for modern networking in the digital era," he said.
