Optical Fibres

Optical Fibres

When light enters the core of the Optical Fibre, the light refracts, this is because the change in refractive indexes of the materials, meaning that the light slows and changes direction slightly.

When the light hits the side of the material, because the air has a lower refractive index, the light undergoes Total Internal Reflection, and so the light reflects back into the material, therefore the light travels down the material until it ends.

Refractive index of air is less than the refractive index of glass

The Optical fibres are made in two different ways; Coherent and Incoherent Bundles

Coherent Bundles: - Fibres are arranged in the same order at both ends, this means that the information that comes out at the end of the Optical Fibre is arranged in the same way that it was put into the optical fibre, meaning the information is formed and readable. These fibres are expensive to manufacture as they require special attention, ensuring that…