In response to the development needs and challenges of China Unicom's high-speed optical transmission network, China Unicom has actively carried out forward-looking research on new G.654.E optical fiber technology and 400G ultra-high-speed transmission technology.
How to choose the next generation backbone transmission network optical fiber? Is it G.652 optical fiber that only reduces the attenuation coefficient, or G.654 optical fiber that combines large effective area and low attenuation characteristics? There are different views on this in the industry.
The development of new optical fiber technology is shown in 1, and the improvement of system transmission performance by different optical fiber characteristics is shown in 2.
Testing and testing work is in full swing. After theoretical research and laboratory verification, G.654 optical fiber is considered by the industry to be an important technical means to meet the challenges of 400G and higher-speed long-distance transmission. It is favored by domestic and foreign operators and Internet companies. Attention, especially in the vast areas of China and North America.
In order to better evaluate and verify the application performance and environmental adaptability of G.654 optical fiber in land high-speed systems, China Unicom began research on new G.654 optical fiber technology in 2014 and carried out a 3-year research project. More than years of sufficient testing and demonstration, including 100G system testing on G.654 optical fiber in the laboratory, pilot project construction of G.654 optical fiber cable in Xinjiang and Shandong, 400G system testing on G.654 optical fiber in the laboratory, and long-term operating performance of G.654 optical fiber in Xinjiang Monitoring, Shandong G.654 optical fiber live network 400G system testing and a series of research work; built the world's first terrestrial telecom operator-level multi-fiber manufacturer G.654 optical fiber and cable project, and carried out the participation of multiple equipment manufacturers at home and abroad Multi-fiber 400G WDM technology evaluation work.
The G.654.E optical fiber and 400G WDM system tests carried out by China Unicom in Jinan-Qingdao, Shandong and Hami-Barkol, Xinjiang have achieved the expected research purposes, and the main results include two major aspects.
1. For the first time, the terrestrial application performance and transmission technology advantages of G.654.E optical fiber have been fully verified. In particular, it has been fully confirmed that the transmission performance improvement brought by the large effective area of G.654.E optical fiber is much greater than that of optical fiber. The performance improvement brought about by the reduced loss is in line with theoretical and laboratory research expectations.
2. For the first time, it is clearly stated that G.654 optical fiber with large effective area should be given priority instead of blindly reducing the attenuation coefficient of G.652 optical fiber.
This research result lays the foundation and points the direction for China’s ultra-high-speed, ultra-long distance and ultra-large capacity transmission technology research and existing network applications. It also effectively avoids the problems encountered when the G.655 optical fiber was introduced. .
This research project has been highly praised and recognized by domestic and foreign mainstream optical fiber and cable experts who participated in the results discussion.
G.654.E optical fiber has received widespread attention at home and abroad. The research results have received widespread attention at home and abroad. China Unicom has been invited to participate in OFC, IWCS andWe have conducted special reports at meetings of CRU and other international organizations, and submitted several ITU standard drafts to promote the completion of the revision of the ITU-T G.654 standard. We also took the lead in formulating the G.654 optical fiber industry standard.
The research results have also been recognized by other operators. In China, other operators are building or planning to build G.654 optical cables. At the same time, North American operators and large Internet companies have also built or are building G.654 optical cables. 654 optical cable.
According to research results, the transmission distance of a 400G WDM system using G.654.E optical fiber is more than 50% longer than that using G.652. situation), reduce construction costs and operating energy consumption, and have huge economic benefits and network service capabilities.
400G technology and ROADM networks are about to be deployed in backbone networks. Data center interconnection requirements are increasing, and optical fiber and cable networks are facing "upgrading." When China Unicom builds new optical cable projects in the backbone transmission network, it will gradually Introducing G.654.E optical fiber to meet the transmission needs of ultra-high speed, ultra-large capacity and ultra-long distance such as 400G; at the same time, China Unicom will release G.654.E optical fiber technical specifications as soon as possible to normalize key technical indicators, unify industry needs, guide and Focus on industrial development, accelerate the maturity of the industrial chain, reduce the cost of new optical fiber, and achieve the optimal cost of network construction.
