Verizon and Nokia Siemens Networks have taken a step closer to being able to transmit commercial traffic at a speed of 100 Gbps traffic. The two companies have carried out a successful 100 Gbps transmission on a single wavelength for more than 1,040 km over field fibre. The field trial was conducted on optical fibre on the Verizon network in north Dallas and proved that 100 Gbps signals can be simultaneously transported with 10 Gbps and 40 Gbps signals on the same system. The Nokia Siemens hiT 7500 ultra-long-haul, dense-wavelength-division-multiplexing platform, combined with multi-level modulation, polarisation multiplexing and coherent detection, allowed the signal to be carried over ultra-long distances at high-data rates with better chromatic dispersion and polarisation-mode-dispersion tolerances than conventional systems. The field trial also demonstrated that 100 Gbps traffic can be simultaneously transported with any mix of 10 Gbps and 40 Gbps on a typical 80-channel ULH DWDM system. As a result, current network configurations can support capacity upgrades to 100 Gbps per channel on existing routes over similar distances without modification to the physical network. This field trial also carried the 100 Gbps signal on a single wavelength to demonstrate true 100 Gbps throughput in a serial configuration. In this field trial, the modulation technology enabled a higher total system capacity of 8 Tbps. The technical details of this field trial were presented in Brussels at the prestigious European Conference on Optical Communications.

Source:Telecompaper