Trial transmission routes 38.4 Tbps traffic over 762-km fibre path
Socionext – the enterprise that was formerly the high-performance SoC and ASIC arm of Fujitsu – provided its high-speed conversion SoCs as part of the record-breaking transmission field trial. For the first time, several tens of terabits per second have been transported over a 762-km fibre optic link – Lyon-Marseille-Lyon – in the Orange (France) optical transport network.
Socionext was part of a team of engineers from Orange, Coriant, Ekinops and Keopsys who successfully demonstrated the highest ever C-band transmission capacity using 24 x 1 Tbps/DP-16 QAM (i.e. 24 Tbps), 32 x 1 Tbps /DP-32 QAM (i.e. 32 Tbps) and 32 x 1.2 Tbps/DP-64 QAM (i.e. 38.4 Tbps) modulation formats in a ‘live’ networking environment. A record-setting transmission reach of 762 km in the same ‘live’ environment was achieved, which is more than twice the distance of any previous field records for 32 QAM, and the first ever regional transmission for 64 QAM. These achievements represent an important milestone in the research and development of highly scalable, spectrally-efficient optical networking technologies for future network growth.
As part of ongoing technology collaboration, Socionext provided key technology and components, in the form of development kits, to enable partners [to carry out] the evaluation and optimisation of higher-order modulation techniques and next-generation algorithms. The new generation of transmitters and receivers used to establish the transmission record were based on ultra high speed DACs and ADCs designed and developed by Socionext’s Network SoC Business Unit using a standard 28 nm CMOS technology. The converters cover a broad sampling range with a maximum rate of 92 Gsamples/sec. High effective resolution and analogue bandwidth characteristics, greater than 20 GHz, makes possible scalable architectures for multiple wavelengths and high modulation formats on a single device. On-chip implementation of the converters using advanced packaging technologies along with very low power consumption are additional features that are mandatory for future long-haul, metro and access applications.
“We are excited to be able to contribute again to a world record in optical transport with our advanced ADC and DAC technology. Our 3rd and 4th generation DAC and ADC IP optimised for network applications will help system vendors to address the exponential growth of global and metropolitan internet traffic” says Manfred Mettendorff, Senior Director with Socionext Europe. “Having already supported the launch of the leading 100 Gbit, 200 Gbit and 400 Gbit technology we are confident that highly power efficient, economic single chip Tera-bit systems are also within reach.”
This field trial was conducted using the latest advances in ultra-high capacity optical communications. The aim for Socionext, Coriant, Ekinops and Keopsys was to validate the compliance of their most advanced optical transport solutions with the real operation constraints of a ‘live’ capital transport network. Whilst Orange was able to demonstrate its legacy fibre infrastructure was able to transport such multi-terabit capacity.
The picture above shows Socionext´s Rotta (ADC) / Oola (DAC) Development Kit designed and developed within the framework of the Celtic-Plus SASER project. [Celtic-Plus is a EUREKA Cluster focusing on ICT and telecommunication.]
The field trial was performed within the framework of the European Celtic-Plus SASER (Safe and Secure European Routing) project funded jointly by the BMBF (Bundesministerium für Bildung und Forschung) and DGE (Direction Générale des Entreprises), and supported by the IDEALIST project (Industry-Driven Elastic and Adaptive Lambda Infrastructure for Service and Transport Networks).