Record tops 2Tbit/s speed for coherent optical network

Record tops 2Tbit/s speed for coherent optical network

Technology News |
By Nick Flaherty

Nokia Bell Labs has demonstrated a record 260 GBaud (2.08Tbit/s) ultra-high-speed optical signal transmission over 100 km of standard single-mode fibre (SSMF)

The demonstration at the European Conference on Optical Communication (ECOC) 2022 in Basel, Switzerland this week exceeded the previous record of 220 GBaud.

“This result is a first milestone to scale long haul data transport systems beyond 2 Tbit/s per wavelength. Improving the energy efficiency of transponders is a permanent challenge for the industry,” said Haïk Mardoyan, Senior Research Scientist at Nokia Bell Labs.

He worked with Keysight Technologies for the Dual Polarization Quadrature Phase Shift Keying (DP-QPSK) coherent transmission over the 100 km single mode fibre. Keysight’s new M8199B  260 GSa/s arbitrary waveform generator (AWG) provides 75 GHz bandwidth and uses a thin-film lithium niobate I/Q modulator with 110 GHz bandwidth.

This enables R&D of transmission systems operated with symbol rates up to 260 GBaud and achieving net bitrates greater than 2 Tbit/s in coherent optical communications.

“The continued proliferation of AI requires new levels of server and network performance that must scale computing resources within reasonable energy bounds. Higher data rates and new modulation formats will be among the enabling technologies for the industry,” said Dr. Joachim Peerlings, vice president of Network and Data Center Solutions at Keysight.;

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