The Optical Cable has the following main components.
The Core provides the pathway for the light to travel. It is made of glass or transparent plastic material.
The cladding is the layer that covers the core. The function of the Cladding is to reflect the light which may come out of the core back into the core. This results in Total Internal Reflection which ensures that there is no loss of the light signal.
The Buffer is a coating which is outside the Cladding. The Buffer serves to protect the optical fibre.
Aramid Yarn Protection
The Aramid yarn which surrounds the buffer provides crush protection to the cable.
The protective jacket offers mechanical protection to the cable.