Fiber Optic cables Essay Example | Topics and Well Written Essays - 2750 words

Fiber Optic courses - Essay ExampleThe phenomenon of guiding light by bent glass has been early given by Leonardo DaVinci in one of his notebooks. But, he has not been able to verify this assertion. What is known for certain is that nub internal reflection of light in a beam of water, basically steer light, and was given by the physicist John Tyndall in either 1854 or 1870, depending upon which lengthiness you consult. Tyndall showed that light could be bent around a corner while it traveled through a jet of pouring water. Using light for communication theory came after this. . In 1934 the first patent on guided visualal communications over glass was obtained by AT &T. unfortunately, no materials were available at that time to fabricate a glass (or other type of transparent material) fiber optic cable with sufficiently low attenuation to make guided optical communications possible.Between 1968 and 1970, experts who were working at a get along of different academic, industrial and government laboratories dropped the attenuation of glass fiber optic cable from over 1000 dB/km to less than 20 dB/km. Corning patented its fabrication process for the cable. In the late 1980s and 1990s this progress increased with the even out lower cost plastic fiber optic cable and Plastic Clad Silica (PCS). In last few years a number of oceanic fiber optic cables squander been fabricated. One cable was fabricated in 1990. That was relatively non-controversial. However, as additional cables were introduced, the coastal fishing industry became more and more concerned about the loss of fishing ground resulting from cable placement, and their liability should they come into contact with a cable. Another cable was fabricated in 1998. To even off their interests a number of coastal fishers formed a committee. After discussion on numerous issues, the fishers and the cable owner reached on a conclusion that has served as the basis for later agreements between these two groups in Oregon. Two concentric layers termed the core and the cladding are the basic composition of a fiber optic cable. These layers are shown in the following figure. Fiber Optic Cable, 3 dimensional view and its basic cross section Both core and cladding have different refraction indexes with the core having R1 and the cladding R2. Light is piped through the core. In Fiber optic cable an additional coating termed as jacket is in like manner provided around the cladding. Core, cladding and jacket are all shown in the three dimensional view on the left side of above Figure. The jacket is ordinarily made up of one or more layers of polymer. This jacket protects the core and cladding from shocks that might affect their optical or physical properties. It acts like a shock absorber. The jacket also provides protection from abrasions, solvents, Small oil