Optical Fibers for Communication

A new transmission medium is about to emerge as a competitor to copper media in many communications applications. It is the optical fiber, 100 Ī¼m or so in diameter and made principally of silica, one of the most abundant materials on earth. When suitably engineered, optical-fiber cables may be used in a variety of applications where twisted copper- wire pairs, coaxial cables, and metallic waveguides are now used for the transmission of information; these applications range from short data links and equipment interconnections within a building to long telecommunications trunk circuits connecting switching offices within a city or between cities.


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