In this post, we will see the difference between optical fibre and coaxial cable.
Transmission media are normally classified into two types – guided and unguided. Guided media is those which uses a physical medium for transmission, like wires.
Unguided media is those which uses air or vacuum as a medium for transmission in a wireless manner, by electromagnetic waves.
Now, we will have a look at guided media here. Guided medium is divided into three major types – coaxial cable, optical fibre and twisted pair.
In this post, we will see the difference between optical fibre and coaxial cable.
First, let us understand both these types.
Optical fibre is a medium that uses light pulses along with transmission fibre, which is glass, silica or plastic. Refer to the below image.
The outer layer of purple colour is the plastic coating. The second layer of dark blue colour is the cladding (less dense glass or plastic).
The third layer of light blue colour is the core and the last green colour layer is the fibre. Light rays travel through this fibre by the principle of internal reflection. This causes the light to reflect itself through the channel and travel till the end.
The light is shown as a black line in the above image. The density of the two last layers is maintained in such a way that the light beam travelling through the core is reflected off the cladding.
Information is transmitted in a binary way as a sequence of on or off light flashes that means 1 or 0.
A coaxial cable is a medium that transmits data in low voltage electrical form. Refer to the below image.
The first layer is the plastic cover shown in red colour. It acts as a shield for the whole cable. The second layer of purple colour is an insulator of metal wrapping which acts as a protection against the noise.
The third layer of dark blue colour is a conductor of a metal braid, foil or a combination of both. The fourth layer is again an insulating shield and the last layer is a conductor of copper.
Now, let us have a look at the differences between both the cables.
In this way, we saw the difference between the optical fibre and coaxial cable.
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itis valuable information
thank you