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12 14tes


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12 14tes

  1. 1. 2.What are Fiber Optics?・FeatureMade by pure glass, which is very thin as long as a human hair.It called optical cable, it transmit light signals over long distance.・ContextureCore - Thin glass center of the fiber where the light travelsCladding - Outer optical material surrounding the core thatreflects the light back into the coreBuffer coating - Plastic coating that protects the fiber fromoutside・TypeSingle-mode fibers - have small cores and transmit infrared laserlightMulti-mode fibers - have larger cores and transmit infrared lightof LED
  2. 2. 4.A Fiber-Optic Relay System?・Device to communicate(1)Transmitter-Produces and encodes the light signals. It receives and directs the optical device to turn the light "on" and "off", and then it produces a light signal.(2)Optical fiber - Conducts the light signals over a distance. It is core communicate device.(3)Optical regenerator - May be necessary to boost the light signal. It produces a new stronger light signal. This device task is a laser amplifier for the incoming signal.(4)Optical receiver - Receives and decodes the light signals. It gets the incoming digital light signals, and then decodes them. They are sends the electrical signals to the various equipment, such as computer, TV or telephone.
  3. 3. 5.How Fiber Optics Work・Advantages points – compared to copper wire(1) Less expensive (5) Light signalsCheaper than copper wire. Optical fibers are not interfered from other fibers.(2) Thinner (6) Low powerSmaller diameters than Optical fibers uses lower-powercopper wire. transmitters.(3) High carrying capacity (7) Digital signalsOptical fibers cab be bundled Optical fibers are suited tofibers than copper wire. carry digital information over(4) Less signal degradation internet.The loss signal is less than in (8) Non-flammablecopper wire. No electricity, therefore is not caused fire hazard. These are only part, more points exist.