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Optical Fibres

The way optical fibres work

The way optical fibres work
Advantages of Optical fibres
Disadvantages of Optical fibres
Uses of optical fibres
Types of optical fibres

The light in a fibre-optic cable travels through the core by constantly bouncing from the cladding (mirror-lined walls), a principle called total internal reflection. Because the cladding does not absorb any light from the core, the light wave can travel great distances. However, some of the light signal degrades within the fibre, mostly due to impurities in the glass. The extent that the signal degrades depends on the purity of the glass and the wavelength of the transmitted light. Below is a diagram of how total internal reflection works in an optical fibre.




By Mathew Barrie - Cusack 5