Optical fiber technology is very important for our high speed communications. The optical with its low weight and high frequency characteristics (approximately 40 GHz) and its imperiousness to interference from electromagnetic radiation, has become the choice for all heavy demand long line telephone communication systems.
The reason why optical fiber used is as follows:
A single fiber can handle as many voice channels as a 1500- pair cable can.
The spacing of repeaters from 35 to 80 km for fibers as opposed to from 1 to 1 and1/2 km for wire is a great advantage.
Fiber is immune to interference from lightning cross talk and electromagnetic radiation.
Fiber is immune to interference from lightning cross talk and electromagnetic radiation.
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