optical fiber are made up of
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a glass optical fibres is a flexible , transparent fibre made by drawing glass. it consists of a core surrounded by a cladding layer... since the diameter of thin glass fibre is about a half of the typical human hair l, fibre cores are made from very high purity optical glass material.
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Optical fibers are made up of silica-based glass or plastic
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Optical fibers are made up of silica-based glass or plastic that are insulators and therefore have no currents flowing in them. As a result, fibers are immune to electromagnetic interference. In addition, no tapping of information is possible with fiber communications.
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