Technology

Light and optical cables

Light is the fastest and most powerful medium for data transmission: a light pulse needs only 1.3 seconds to travel the distance from the earth to the moon. In order to transport light pulses in cables, an optical system is required; the fibre-optic cable.

Fibre-optical cables are made of fine fibres of quartz glass. Despite their small diameter of only 0.125 millimeters, they transport 5000 times more data than copper cables. Fibre optics also have superior transmission properties. While a regenerator is required every three kilometers when using conventional copper cables, fibre-optics can carry information over 80 km without amplification. Moreover, they are insensitive to electromagnetic interference.

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