The transmission was made possible by using the Fujitsu FLASHWAVE 9500 Packet Optical Networking Platform (Packet ONP) to transmit data with a 25% 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 modulation techniques including dual-polarization quadrature phase shift keying (DP-QPSK) and dual-polarization 16-ary quadrature amplitude modulation (DP-16QAM) to 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 400 Gbps transmission over the MAX network footprint, alongside existing 10 Gbps and 100 Gbps channels. After this was demonstrated, an error-free rate of 800 Gbps 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.
Mid-Atlantic Crossroads (MAX) is a multi-state regional network led by the University of Maryland. MAX owns and operates an all-optical, Layer 1 core network that is the foundation for a high-performance infrastructure providing 100 Gbps network technology and services.