MAX-Fujitsu demo up to 800Gb/s optical networking speed
Mid-Atlantic Crossroads (MAX) and Fujitsu Network Communications Inc. have revealed that they have successfully transmitted 400Gb/s and 800Gb/s of data rates over MAX's optical network from Baltimore, MD, to McLean, VA, during a field trial based in College Park, MD. The trial lasted for a week and has shown Fujitsu's super-channel capabilities on a deployed network. The demonstration likewise confirmed that MAX can provide a 400Gb/s-capable networking infrastructure to the surrounding research and education (R&E) community, as well as deliver even higher speeds on the existing installed base of equipment, the companies indicated.
This record-speed transmission was made possible by using the Fujitsu FLASHWAVE 9500 Packet Optical Networking Platform (Packet ONP) to transmit data with a 25 per cent improvement in channel spacing over conventional dense wavelength division multiplexing (DWDM). These condensed channels are a result of flexible grid utilization and are combined with advanced modulation techniques including dual-polarization quadrature phase shift keying (DP-QPSK) and dual-polarization 16-ary quadrature amplitude modulation (DP-16QAM) to greatly increase network utilization without requiring any physical adjustments to the MAX network infrastructure. The end result is a super-channel that allows more than 2.5 times increase in bandwidth in the same amount of spectral width as current DWDM technologies.
The field trial focused on achieving a stable 400Gb/s transmission over the MAX network footprint, alongside existing 10Gb/s and 100Gb/s channels. After this was demonstrated, an error-free rate of 800Gb/s was also attempted and achieved during the test, indicating a wealth of possibilities for the current state of optical networking, while also shining a light on future networking capabilities.
This dramatic increase in network speed will allow MAX to provide its participants with even more robust and scalable network communication capabilities across Maryland, Virginia, and the District of Columbia. 400Gb/s will help scientists across the mid-Atlantic minimize the limitations of geographic distance and maximize the demands of science applications in order to expedite the transmission of data and, ultimately, discoveries through groundbreaking research.
Fujitsu's super-channel capabilities claim to enable higher per-channel scalability. Support for multiple modulation schemes including DP-QPSK and DP-16QAM opens up the ability to optimize spectral efficiency while accommodating dynamically-changing reach demands. Additionally, Nyquist filtering techniques leverage spectral shaping resulting in an increase in spectral density. With nonlinear fiber impairments being a major limiting factor of optical transmission, the field trial demonstrated nonlinear compensation (NLC) techniques to reduce the resulting optical penalties and extend the achievable transmission distance. All of these advancements enable a much higher utilization of costly fiber infrastructure and maximize the bandwidth available for demanding R&E applications.