Optical - Essay Example

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It is an optical fibre which has been created from plastic. In most cases, acrylic is usually used as the core material while the cladding material is usually made of fluorinated polymers. There has been, however, an…
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Download file to see previous pages Since the future demands a high speed networking, plastic optical fibre can be a possible option in the next generation.
 There are different types of plastic optic fibres. These types arise due to the attributes that determine any type of transmission media. The main attributes are; the length over which data will be transmitted and the speed at which the data will be transmitted over a given length. There can be loss of data during the transmission process, and this arises from scattering the light or absorption of the light by impurities in the fibrelike molecules of water or metals, fibre defects like voids, interfaces of core cladding and the end faces. Any one of the loss mechanisms is usually a function of the transmission wave’s wavelength (Weinert, 1999).
One type of a plastic optical fibre is the PMMA. The PMMA loss spectrum has 530 nm, 570 nm and 650 nm transmission windows. All these windows are in the visible range. The 650 nm window is more sensitive because it is narrow. If a 650 nm source shifts with temperature, there could be arousal of problems in this window. On the other hand, the 57 and 530 windows are broader hence less sensitive to source wavelength shifts due to temperature variations. The PMMA plastic fibre is limited to transmitting light of less than 100 m. this is because the losses at 650 nm are 125dB/km while the loses at 570 nm and 530 nm are less than 90dB/km (Plastic Optical Fibres and Applications Conference (Paris)), 1992).
Another type of plastic optical fibre is made from perfluorinated polymers. This newer type of plastic optical fibre exhibits greater light transmission over a wider range of wavelength. There are two notable features that are seen when comparing the loss spectrum of perfluorinated polymer to that of PMMA. One is that the spectrum for the perfluorinated polymer ranges from 650 nm to 1300 nm. This range is notably higher than the range for PMMA. The second outstanding ...Download file to see next pagesRead More
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