The world's first large-effective area optical fiber land optical cable project was completed

Group photo of "Preparing for 400G - New Optical Fiber and Cable Technology Innovation and Industrial Development Summit Forum"

The world's first large-effective area optical fiber land optical cable project was completed
.
It is reported that China Unicom has achieved initial success
in the trial of a new "large effective area optical fiber" optical cable deployed by China Unicom among global telecom operators.

Xigu Guangtong is an optical cable application integrator in Hami-Balikun, Xinjiang, undertaking the production and testing
of optical fiber incoming inspection, overmolding, cable formation, and sheath.

Wang Guangquan, director of the network technology research department of China Unicom Network Technology Research Institute, said that from the perspective of OSNR and FOM, increasing the effective area of optical fiber and reducing the attenuation coefficient of optical fiber is the main means to improve system transmission performance and extend the transmission distance of the system, and it is also an important direction for the development of
new optical fiber technology.

Among the new optical fibers, large-area optical fibers have previously been used in submarine cable communication systems, but have not yet been applied to land
.
Wang Guangquan pointed out that after laboratory testing, the use of large effective area optical fiber to increase the fiber optic power can extend the transmission distance and significantly improve the transmission performance
of the system.
In the industry's laboratory tests for 400G and 1T networks, the system without power relay transmission distance based on existing optical fibers (G.
652 and G.
655) is shorter
.

It is understood that G.
654 optical fiber is used in submarine cable communication system, divided into four subcategories of ABCD, in July 2013 the industry began to discuss G.
654E class applicable to land, and is expected to complete the standard in September 2016, and reached a consensus
on MFD, dispersion coefficient, PMD, macrobending, optical cable attenuation coefficient, cut-off wavelength and other parameters according to China Unicom's manuscript.
In addition, China Unicom led the start of standardization work in CCSA at the end of 2015, which is expected to be completed
in 2017.

In 2015, China Unicom joined hands with mainstream optical fiber and cable suppliers at home and abroad to carry out field tests of G.
654E optical fiber, and built two trunk optical cables using G.
654E optical fiber in Xinjiang and Shandong by overhead and pipeline, respectively, passing through the desert Gobi, alpine snow mountains and highway communication pipelines, and presided over the special research on the harsh environment adaptability, construction, installation and maintenance support technology of the new large-effective area optical fiber.
In June 2016, the engineering project and technical research acceptance
were successfully completed.
This world-leading engineering research project has attracted great attention from the domestic and foreign industries, and has received full support from experts in various fields and fiber and cable suppliers such as Changfei, Fiberhome, Corning, OFS, Sumitomo (Futong), Hengtong, Zhongtian, Xigu, etc.
, demonstrating China Unicom's excellent technical research and management capabilities
.