The terrestrial network in China is mainly subject to the ordinary G.652.D optical fibre currently, while most of the optical cable laid in 1990s and have reached 20 --25 years’ service life, therefore, the backbone network should be upgraded gradually in the next few years. Therefore, how to choose the right optical fibre for the long-distance  terrestrialoptical cable is a key problem urgent to be solved for the network operators and optical communication companies. In order to obtain the best system performance, if we can  combine the ultra-low attenuation and large effective area characteristics into an optical fibre, such optical fibre will be the best optical fibre in the next-generation communication optical fibre.

1.     G.654.E Recommended indicators

The following table shows the currently discussed G.654.E optical fibre indicators and YOFC ultra-low loss large effective area optical fibre datasheet.  the ultra-low attenuation large effective area optical fibre (FarBand ® Ultra) of YOFC can meet and even be better than the most existing stringent G.654.E standard recommendation proposals.

*Still under discussion, ITU-T Q5 group has no specific recommendations.

2.     Design and manufacturing of optical fibre

Schematic diagram for optical fibre refractive index profile structure

Compared YOFC the ultra-low loss large effective area optical fibre with the traditional fluorine-doped external cladding structure ULL fibre, YOFC adopts pure silicon dioxide  (SiO2) as the optical fibre cladding, due to the reduction in the use amount of fluorine-doped materials, in terms of material preparation cost, preparation technology difficulty, environmental protection and other points of view, our ultra-low attenuation large effective area optical fibre products are more competitive in the cost.

3.     Optical fibre and optical cable performance