Vodafone, Huawei Wrap Up 2 Tbit/s WDM Field Testing
31 January 2013
Huawei and Vodafone have completed the field trial of 2 Tbit/s wavelength-division multiplexing (WDM) fiber-optic transmission technologies on the British telecommunications company's live network.
The trial achieved 2 Tbit/s transmission capabilities over a 3,325 km length, a throughput 20 times higher than the currently operational 100 Gbit/s systems. The successful trial could lead to advanced optical transport systems with capacities far exceeding the 100G technology, the Chinese networking and telecom equipment maker said.
Surging traffic on carrier backbone networks is driving commercial 100G deployments and drawing interest in optical transport systems beyond 100G. Based on flex-optical digital signal processing (Flex-ODSP), flex modulation format and super soft-decision forward error correction (SD-FEC) technologies, the trial achieved a record transmission distance of 1,500 km using a super-channel polarization-division multiplexing quadrature amplitude-modulation (PDM-16QAM)-based high-spectral-efficiency approach. It also broke another record, achieving a transmission distance of 3,325 km through the use of a super-channel Nyquist PDM-QPSK-based ultra-long-haul system.
Both transmissions were on a link with widely-used G.652 fibers and erbium-doped fiber amplifiers (EDFAs) without electrical regeneration. The link used in the trial was on Vodafone's backbone network crossing several cities in the central and southern parts of Germany.
Last year, the Chinese firm carried out what it claimed to be the world's first 2T WDM field trial and pan-European 400G field trial.