Push to 400Gbit/s systems drives need for 10Gbit/s trunking
By Nick Flaherty www.flaherty.co.uk
Chinese telecoms equipment maker ZTE has broken the previous world record for single-channel data transmission with a recorded single-channel rate of 10Tbit/s over 640km of single-mode fibre optic cable. This is the equivalent of sending 160 HD movies per second.
The results of the test transmission were presented at the recent OFC/NFOEC conference in Los Angeles and lays a foundation for future research into optical transmission technology with higher single-channel rates at the heart of the internet of the future based on ZTE's patented “carrier generation technology”. This generates 112 coherent and frequency-locked optical sub-carrier signals; with each sub-carrier bearing 100Gbit/s optical signals, and successfully achieved optical signals with a single-channel rate of 11.2Tbit/s, a net 10Tbit/s line rate plus overheads such as forward error correction (FEC).
In an era where the global optical communications industry is entering 100Gbit/s transmission, all mainstream manufacturers are not only promoting the practical deployment of 100Gbit/s but also actively seeking candidate technologies at higher bit rates of 400Gbit/s, 1Tbit/s, and beyond. With rapid growth in demand for higher bandwidth, single channel 10Tbit/s will be the transmission rate for future telecommunication networks.
The ZTE paper was the only post-deadline paper presented by a Chinese company at the conference and the company sees this as confirming its position as a global technology leader in the fibre communications transmissions over competitors such as Huawei.
“With OFC’s acknowledgement of our research results in 100G and beyond-100G technology, we will go on to invest further efforts in high-speed optical transmission and apply further research results in the pending global deployment of 100G technologies,” said Fan Xiaobing, General Manager of ZTE’s bearer network product line.