Today fiber optic cable is a distinctive type in the cable environment.As a basic element acts glass, allowing to transmit information over long distances without significant loss of speed.Transmission in this case carried out not by an electric signal, and thanks to the light pulse, which helps to provide a high noise immunity and security of transmitted information.However, the installation of fiber optic cable creates some difficulties because it requires during installation of connectors micron accuracy.This will further depend on the decay process.
usually laying fiber-optic cable is done manually or with the use of special winches.In the process of work must take into account a lot of factors that can affect the outcome.When laying need to use a special device to help reduce friction and prevent damage to the bends.Tightening is carried winches determining traction.The final pits left margin cable cable boxes.
Any fiber optic cable can be single mode or multimode.In the first case, all the rays overcome the same way at the same time reaching the receiver.For this type of suitable laser transceivers transmit light with desired wavelength.It should be mentioned that the cost is quite high, but in the nearest future, this option is considered the most promising.
As for multimode counterparts, they have a significant spread, which is why there is a distortion in the reception.Their popularity is due primarily to the relative cheapness.Delay in such networks will correspond approximately to the network with an electric cable.
Although fiber optic cable and has a very weak damping, it is inherent chromatic dispersion, which is in a different light transmission through the glass.Thus, the light signal can be decomposed into individual color components (rainbow effect).On a small segment of it is able to get to the next bit, which ultimately leads to loss of data.However, this does not apply to single-mode cable where the transmitted light has the same frequency.When used the effect of chromatic dispersion does not occur.
In fact, fiber optic cable has a similar structure to a coaxial electrical fellow, but instead of copper wire in the middle is a thin glass fiber.As an internal insulation here is a plastic or glass cover, which prevents the output light.We can say that the total reflection of light is produced by means of two substances that have different refractive indices.Very rarely used metal sheathing, since it makes no sense to protect the optical fiber from electromagnetic interference.Yet sometimes use such protection when you need a mechanical protection from the environment.
