Chapter 8: FIBER OPTIC COMMUNICATIONS (WITH ERRORLESS ANSWERS)

Fiber Optics correct answers It is the science, study, or technology dealing with light transmission. Optical Fiber correct answers It is the medium, channel or path where light signals travel. Alexander Graham Bell correct answers In 1880 he experimented the transmission of sound waves over a beam of light using a device known as photophone. John Baird and Clarence Hansell correct answers They were granted patents for scanning and transmitting television images through uncoated fiber cables. Heinrich Lamm correct answers A German scientist successfully transmitted images through a single glass fiber. Abraham van Heel, Harold Hopkins, Narinder Singh Kapany correct answers In 1950s they experimented with light transmission through bundles of fibers. Their study led to the development of flexible fiberscope. Narinder Singh Kapany correct answers He coined the term fiber optics in 1956. He was from England who was regarded as the father of fiber optics. Charles Townes & Arthur Schawlow correct answers They wrote a paper describing how it was possible to use stimulated emission of light waves as well as microwaves. Theodore Maiman correct answers He built the first optical maser in late 50s. George Bockham and Charles Kuen Kao correct answers They proposed a new communication medium using cladded fiber cables. Kapron, Keck, & Maurer correct answers They are from Corning Glass Works in Corning, New York who developed an optical fiber with losses less than 2 dB/km. Core correct answers It is the internal material of the fiber, specifically the central part of the fiber where the light propagates. Cladding correct answers It is the material of lower refractive index that surrounds the core. Protective Coating correct answers It is a special lacquer, silicone or acrylate coating that is generally applied to the outside of the cladding. Buffer Jacket correct answers It surrounds the protective coating and provides the cable additional protection against abrasion and shock.