Telcos close to TV nirvana.The age of interactive television and of the tripling of current available cable channels came a step closer when ATT's Bell Laboratories demonstrated a fiber-optic cable capable of carrying 6.8 billion bits of information simultaneously. The ordinary telephone wire can carry 64,000 bits. The thin strand Strand, street in London, England, roughly parallel with the Thames River, running from the Temple to Trafalgar Square. It is a street of law courts, hotels, theaters, and office buildings and is the main artery between the City and the West End. 1. of fiber-optic wire has the capability of carrying some 100,000 phone conversations simultaneously. The ATT ATT ammonia tolerance test. experiment involved sending laser configurations over 520 miles of land lines. ATT said the fiber-optic wire could carry the telephone traffic for a small city. In fiber optics fiber optics, transmission of digitized messages or information by light pulses along hair-thin glass fibers. Each fiber is surrounded by a cladding having a high index of refractance so that the light is internally reflected and travels the length of the fiber , computers fire lasers, which turn off and on in digital code. Optical detectors Optical detectors Devices that respond to incident ultraviolet, visible, or infrared electromagnetic radiation by giving rise to an output signal, usually electrical. Based upon the manner of their interaction with radiation, they fall into three categories. are then used to interpret the information. The ATT experiment used four lasers, firing in four "colors" or wavelengths. |
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