Optical fiber attenuation and nonlinear effects have become the main problems limiting its long-distance transmission

In the era of 100G and ultra-100G, with the development of coherent reception and DSP technology, fiber dispersion and polarization mode dispersion are no longer the main limiting factors for long-distance transmission of light, however, optical fiber attenuation and nonlinear effect have become the main problems restricting its long-distance transmission. In order to increase the transmission distance of 400G, reducing the loss of optical fiber and increasing the effective area of optical fiber have become the most important ways to solve the problem of optical fiber transmission. Corning has developed a minimum loss of 0. 146dB/km optical fiber reaches the lowest loss of 0 at 1560nm. 146dB/km, loss is 0 at 1550nm. 1467dB/km China's optical fiber manufacturers such as Changfei have also issued standard G. 652/G. The ultra-low loss of 654 specification breaks the monopoly of foreign manufacturers on ultra-low loss optical fibers and further promotes the maturity of the industrial chain. Long Shengya, manager of Changfei research and development department, said: 'ultra-low attenuation and large effective area optical fiber is an inevitable choice to support the next generation of high-speed, long-distance and large-capacity transmission, and can be applied to marine networks and land long-distance trunk networks. This kind of optical fiber developed by Changfei also has ultra-low attenuation (Typical value is 0. 165dB/km)And large effective area (Typical value is 110 μm2) The optical performance of the can effectively reduce power consumption and meet the requirements of optical fiber long-distance transmission. '