New large-capacity long-distance optical fiber cables for long-distance communications
Mainly some new G.655 optical fiber cables with large effective area and low dispersion maintenance. Their PMD value is extremely low, which can make the existing transmission system more efficient. The capacity can be easily upgraded to 10~40Gbit/s, and it is easy to use distributed Raman effect amplification on optical fiber cables, greatly extending the transmission distance of optical signals.
New low-peak fiber optic cable city for metropolitan area network communications Simplification of equipment and cost reduction need to be considered in the design of the domain network, and the possibility of using non-wavelength division multiplexing technology (CWDM) needs to be considered.The extended band of low water peak fiber optic cable in the 1360-1460nm band greatly expands the bandwidth, greatly optimizes the CWDM system, increases the transmission channel, and increases the transmission distance.
The design of some metropolitan area networks may not only require the optical fiber cable to have a low water peak, but also require the optical fiber cable to have a negative dispersion value. On the one hand, it can offset the positive dispersion of the light source optical device, and on the other hand, it can be used in combination. A kind of negative dispersion fiber optic cable and G.652 fiber optic cable or G.655 standard fiber optic cable, use it for dispersion compensation, thereby avoiding complex dispersion compensation design and saving costs.
If Raman amplification technology is used in metropolitan area network optical fiber cables in the future, this kind of network will also have obvious advantages.
But after all, the specifications of metropolitan area networks are not yet very mature, so the specifications of metropolitan area network optical fiber cables will continue to change with the changes in metropolitan area network models.
