Optical-Fiber Cable
Optical-Fiber Cable
If you need a very high degree of noise immunity or information security, consider the use of
optical fiber instead of UTP. Optical fiber is a medium that uses changes in light intensity to
carry information from one point to another. An optical-fiber system consists of a light source,
optical fiber, and a light detector. A light source changes digital electrical signals into light
(that is, on for a logic 1 and off for a logic 0), the optical fiber transports the light to the destination,
and a light detector transforms the light into an electrical signal.
The main advantages of optical fiber are very high bandwidth (megabits per second and gigabits
per second), information security, immunity to electromagnetic interference, lightweight
construction, and long-distance operation without signal regeneration. As a result, optical fiber
is superior for bandwidth-demanding applications and protocols, operation in classified areas
and between buildings, and installation in airplanes and ships. IEEE 802.3’s 10Base-F and
100Base-F specifications identify the use of optical fiber as the physical medium. Of course,
FDDI identifies the use of optical fiber as well.
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