Introduction: The arrival of the era of 400G, put forward higher requirements to the existing network. This means not only need to improve the equipment performance, but also means that the industry needs to find a new type of optical fiber is more suitable for large capacity and long distance transmission. At present, the mainstream of optical fiber and cable manufacturers are actively developing related products, and provide strong support to extend the transmission distance of optical network transmission performance, enhance system.
With the broadband network Chinese strategy to promote and Optical fiber The development of technology in China, 2016network Into the fiber, thanks to the three operatorsOptical network The construction of. China Telecom ,China Unicom Continue to promote the light, build optical Province in the country, and China Mobile To increase the fixed investment, from the first quarter of 2016 China Mobile home broadband customers can see the number of breakthrough 60 million.
The light to accelerate new business process 4K
The operator of light rapid progress, for example China Unicom has built 8 all-optical network, optical network is expected to be completed nationwide this year (ten northern province).
FTTH Is not the end of the development of broadband, light for the development of new business to clear the obstacles, the development of operators in the next step will be to increase new business 4K video etc..
In remarkable, in terms of 4K operators in March 2016, Chinese Unicom set up 4K experimentRoom, building 4K industry alliance, combined with the industry chain parties to promote the development of 4K recently; and HUAWEI The company reached a strategic cooperation, 4K video field joint innovation cooperation; issued the Chinese Unicom 4K IPTV The white paper. Guangdong Telecom has also recently announced IPTV 4K over one million users. Operators in 4K rapid progress also confirms its light value.
The industry put forward obvious demands of 400G optical system
from Optical communication System view, China has deployed the worlds largest 100GNetwork, science and Technology Committee of China Telecom director Wei Leping has said that the backbone is steadily evolving, 2013 network link maximum passage capacity reached 12T, 100G began large-scale deployment and become the leading technical backbone network. By 2017 passage capacity will reach 46T, 400G began to demand.
Wang Guangquan, director of China Unicom China Institute of network technology, network technology research department pointed out that in the 100G era, CD/PMD is no longer the main limiting factors, and the nonlinear effect of optical fiber attenuation will become the main factors affecting the transmission performance of the system. How the Shannon limit equilibrium, spectrum efficiency and transmission distance and system capacity, become a key problem in 400G application deployment.
In the face of the upcoming 400G era, the three operators have begun testing of 400G network, 400G network for commercial preparations, for example, China Mobile has been in Xian to Zhengzhou route 400G test.
The arrival of the era of 400G, put forward higher requirements to the existing network. This means not only need to improve the equipment performance, but also means that the industry needs to find a new type of optical fiber is more suitable for large capacity and long distance transmission. At present the mainstream optical fiber and cable Manufacturers are actively developing related products, and provide strong support to extend the transmission distance of optical network transmission performance, enhance system.
The research and development of new fiber like a raging fire
The industry of the 400G network laboratory test, based on the existing fiber (G.652 and G.655) to realize the system cannot meet the requirements of long distance transmission system 400G. The large effective area increase in optical fiber optical power, can extend the transmission distance and improve the transmission performance of the system. Novel fiber G.654 400G ultra high speed backbone transmission has become the main choice for optical fiber.
At present, many of the worlds optical fiber optical cable Manufacturers have developed new products such as G.654 fiber. YOFC released far super ultra low attenuation, Beckham large effective area optical fiber G.654 ITU-T meet or exceed G.654.B standard; make UUA ultra low loss ultra large effective area of single mode fiber G.654-135 is the first single independent development of our original ultra low loss single-mode fiber with large effective area; land ZTT low loss fiber G.654 meet ITU-T G.654B and the G.654E standard (draft).
Chinese Unicom is G.654 pioneer fiber into the currently open network pilot tested in Shandong and Xinjiang two grade one and two lines, evaluating its transmission performance and environmental adaptability.
The construction period and long life of optical network, a very large investment, so the introduction of new fiber, operators need to fully verify, be careful. Wang Guangquan said, Chinese Unicom will continue to promote new fiber collection performance verification, network test within two years data And focus on the differences in the cable attenuation; compared with the G.652 and G.654 properties of optical fiber, optical fiber model verify the possibility of the application of land and environmental adaptability; at the same time, the network will also carry out 400G G.652 and G.654 based testing, validation of different fibers into the fiber optical power, and validation of the G.654 optical fiber transmission performance.
