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

Fiber Optic c equal to(p)s - Essay ExampleThe phenomenon of guiding silly through band 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 total internal reflection of light in a spear of water, basically head light, and was given by the physicist John Tyndall in either 1854 or 1870, depending upon which reference you consult. Tyndall showed that light could be bent close to a corner while it traveled through a cat valium of pouring water. Using light for communications came after this. . In 1934 the first patent on guided optical communications all over glass was obtained by AT &T. unfortunately, no materials were available at that while to fabricate a glass (or other type of transp arent material) fiber optic line of work with sufficiently low attenuation to make guided optical communications possible.Between 1968 and 1970, experts who were working at a number of diff erent academic, industrial and government laboratories dropped the attenuation of glass fiber optic furrow 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 lower cost plastic fiber optic cable and Plastic Clad Silica (PCS). In last few years a number of maritime fiber optic cables have been fabricated. One cable was fabricated in 1990. That was relatively non-controversial. However, as extra cables were introduced, the coastal fishing industry became increasingly 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 represent 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 the se two groups in Oregon. twain 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 character 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 crown is also provided around the cladding. Core, cladding and jacket are all shown in the three dimensional view on the unexpended side of above Figure. The jacket is usually made up of one or more layers of polymer. This jacket protects the core and cladding from appals that might affect their optical or physical properties. It acts like a shock absorber. The jacket also provides protection from abrasions, solvents, Small oil