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Communications Revolution |
Communications Networks |
Optical Fibres |
Photonic Devices |
Future of Communications | Credits |
The yellow character which is further away from the white character hears a weaker sound than the purple character.
Sound gets attenuated.
In a similar way, light gets attenuated when travelling in an optical fibre.
The amount of light coming out at the end of the fibre is less than the amount originally transmitted.
Attenuation is measured in decibels per kilometer
(dB/km).
It is related to the
ratio of the
output and
input power of the fibre.