As the network news networkThe most important cornerstone, in optical transmission Evolution, under the background of network upgrade, optical fiber and cable Technology is also accelerating the pace of development. At present, in order to meet the 400G super 100G The need for the deployment of network, Optical fiber Toward the big effective area, low loss in the direction of evolution. At the same time, along with the broadband Chinese landing; strategy, network city construction for more comprehensive way. FTTx The deployment of the necessary fiber and optical cable The emergence of products. and 4G Network coverage and depth Data centerThe vigorous development, but also to optical fiber and cable industry bring new opportunities. We can see that in the multiple promotion of market and technology, optical fiber and cable industry in China is being ushered in a new round of development, and the optical fiber technology innovation, is to lay the foundation for accelerated ICT technology applied to all walks of life.
data Traffic surge prompted the optical transmission network upgrades, from a few years ago40G There are large-scale deployment of 100G, to 400G for the future, a higher rate of 1TWDM And continuously improve the performance of the optical transmission network is encouraging industry to break through the bottleneck of the existing optical fibers, optical fiber technology research and development for Yu Chao 100G era. G.654.E fiber ITU-T upcoming standard in September this year, with a large effective area, low / ultra-low loss characteristics for large-scale deployment of 400G networks in the future to pave the way ;.
At present, China Unicom Has developed G.654.E fiber 400G network pilot validation based on the evaluation of the transmission performance and environmental adaptability, and lay the foundation for the future of G.654.E in optical fiber backbone network into high-speed transmission. Director of China Unicom Research Institute of network technology, network technology research department Wang Guangquan and optical fiber and cable Limited by Share Ltd strategic marketing manager Zhou Qinmin and the application of G.654.E in high speed optical fiber backbone transmission network to reporters expressed their views.
Application of G.654.E fiber has become a consensus
G.652 fiber is used in the existing network, has been unable to meet the future optical transmission network for ultra-high speed, large capacity and long distance, the industry hopes to introduce new fiber technology, supporting the ground to provide ultra 100G technology as 400G, 1T etc.. Wang Guangquan uses this sentence simply expounds the background of the birth of G.654.E fiber. He said that G.654 had been in the application of optical fiber cable, divided into A, B, C, D four sets in the standard. At present, the industry in the G.654 fiber land in order to adapt to the consensus over the deployment of 100G systems, ITU-T G.654.E is developing a standard, will be released in September this year.
A lot of data validation has been proved, with modulation and demodulation and signal processing technology at present, even the G.652 ultra low loss fiber can effectively support 400G and above the rate of long distance transmission requirements, therefore, the development of new fiber is very important; Zhou Qinmin said, YOFC began as early as 2010 related technology research and development research, in cooperation with relevant institutions in 2013 YOFC, using far shell of low loss single-mode fiber with large effective area, complete the real-time transmission test the world's first single wave of T bits, and in 2014 the international papers published. Subsequently, YOFC Chinese together Unicom network transmission has been completed test of single wave 100G research institute. The theoretical and experimental data confirmed that this kind of optical fiber communication optical fiber transmission performance is relative to the other in super high speed transmission system. In April 2015, YOFC in the United States during the OFC conference, officially released for the global performance significantly improved the far shellfish super ultra low loss single-mode fiber with large effective area, becoming the first global third has a large effective area of ultra low loss fiber products manufacturers, is also the only domestic enterprises to master the ultra low loss optical fiber technology, fill the domestic blank.
The key issue for the deployment of the 400G application, Wang Guangquan believes that the main is to be in the Shannon limit equilibrium, spectrum efficiency and transmission distance, system capacity and cost. At present, the development of optical fiber technology is showing three trends, the first is the low / ultra-low loss optical fiber, second large effective area fiber third is a large effective area and low / ultra-low loss optical fiber. The domestic manufacturers in the choice of technology path, basically chose to combine large effective area and low / ultra-low loss, which is a novel fiber – G.654.E.
At the same time combined with ultra low loss and large effective area two characteristics is actually one step Zhou Qinmin believes that ultra low loss large effective area of G.654.E fiber is the best choice of the 400G/1T system, in addition to ultra low attenuation, large effective area two core advantages, it can also have excellent macro bending and micro bending performance in a particular process, to meet the need for the deployment of complex environment.
Unicom 400G network authentication orderly
The cable network construction period and long service life, large investment, the introduction of G.654.E fiber, Chinese Unicom uphold the cautious and scientific attitude, step out experiment Pilot chamber and network verification According to Wang Guangquan introduction, 2014, China Unicom 100G business platform based on Chinese, carried out verification of G.654.E optical fiber transmission performance. The test results show that compared with the traditional G.652 fiber, G.654.E fiber can be extended from 70%~100% Guang Chuanshu. In order to evaluate G.654.E fiber transmission performance and environmental adaptability, 2015 Chinese Unicom Network verification was carried out in the East and West, will further test on 400G system recently. The fact that at this time node in the network to promote the G.654.E fiber 400G system verification, is the most suitable time, because the whole chain of optical fiber and cable industry has accumulated related technology, and Chinese Unicom will also present the results with the industry to share, to jointly promote the Optical communication The innovation and development of the industry ; He stressed.
At present, several manufacturers including YOFC, involved in the Chinese Unicom G.654.E network pilot verification. Zhou Qinmin said that from the beginning of 2015, YOFC will actively participate in the Chinese Unicom G.654.E network authentication, exclusive of low loss ultra low loss and large effective area of large effective area of two kinds of single-mode fiber, according to the current network verification need to set up a technical team, specialized throughout the follow-up, actively cooperate with the China Unicom push G.654.E fiber for the first time in the world the use of land. At the same time, YOFC also actively participate in the formulation of the international standard G.654.E, presented the manuscript to ITU. At the end of 2015, Chinese led to promote the development of CCSA in China Unicom G.654.E standard, YOFC fiber as enterprise leaders, actively submit manuscripts, contribute to.
The appearance of new fiber, both opportunities and challenges for the industry. In Wang Guangquan s view, the introduction of G.654.E fiber is expected to provide strong support for the 400G, 1T and the future high speed optical transmission, rapid upgrade of optical backbone network, but for operators, this is not a small challenge, fiber network construction can start from scratch , laying the fiber with 20~30 years of life therefore, the introduction of G.654.E optical fiber must be based on scientific, rigorous, repeated argumentation. He said, China Unicom will continue to collect the test data of 400G system, different fiber performance compared with G.654 and G.652 in the cable, verify the different fiber best input fiber power, so as to enhance the performance of optical transmission verification G.654.
In fact, in addition to optical fiber and cable manufacturers, major system equipment manufacturers have been actively involved in the China Unicom 400G network pilot verification, technical development requires the whole industry support, only the industrial chain link together, in order to realize the breakthrough, with the scale of application; At the end of the interview, Wang Guangquan used this word was summed up, he said, Chinese Unicom will uphold an open and win-win attitude, we will share the results with the industry network, but also hope that more manufacturers involved, to lay a solid foundation for the arrival of the era of 400G. Long will continue to increase R D efforts G.654.E fiber, sharing the latest technologies and products with the industry, as 400G network pilot verification and future scale deployment to provide strong support. Zhou Qinmin said.
