Fiber Optic Cable - Fiber Optic Cable A fiber-optic cable...

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Fiber Optic Cable A fiber-optic cable is made of glass or plastic and transmits signals in the form of light. Light travels in a straight line as long as it is moving through a single uniform substance. If a ray of light traveling through one substance suddenly enter another (more or less dense) the ray changes direction. Fiber optic cable consists of one or more filaments of glass fiber wrapped in protective layers. Optical fibers use reflection to guide light through a channel. A glass or plastic core is surrounded by a cladding of less dense glass or plastic. The difference in density of the two materials must be such that a beam of light moving through the core is reflected off the cladding instead of being refracted into it The measurement of attenuation versus wavelength shows a very interesting phenomenon in fiber-optic cable. Attenuation is flatter than in the case of twisted-pair cable and coaxial cable. The performance is such that we need fewer (actually 10 times less) repeaters when
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  • Spring '13
  • nmnm
  • fiber-optic cable

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