Fibre optic cables.
A fibre optic cable uses light to transmit data signals from one point to another on the network. A Light Emitting Diode (LED) is used at the source/transmitter (sending computer) to convert electrical signals to light signals which are then send along the cable. At the receiving computer, a photosensitive device is then used to convert the light signals back to electric signals that can be processed by the computer. A fibre optic cable is made up of;
1. The Core.
This is the central part of the cable, and is made of a hollow transparent plastic or glass. 2. Cladding.
This is a single protective layer surrounding the core. The Cladding is able to bend light rays, (i.e., when light tries to travel from the core to the cladding, it is redirected back to the core). 3. Buffer.
It surrounds the cladding. Its main function is to strengthen the cable. 4. The Jacket.
Types of fibre optic cables.(i). Single mode fibre optic cable.
The single mode fibre has a very narrow centre core. This implies that, the light in the cable can take only one path through it.
(ii). Multimode fibre optic cable.A multimode fibre has a thicker centre core than the single mode fibre.
Advantages of fibre optic cable.
Disadvantages of fibre optic cable.
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