Abstract
As now visualized one very important part of long distance optical communication systems will be low loss glass fiber waveguides. New glasses of considerably higher purity than previously available have been prepared which have in turn been processed into clad glass fibers while avoiding the incorporation of impurities, bubbles, crystals and other undesirable Imperfections. The initial stimulus for the development of this type of waveguide should probably be credited to K. C. Kao and G. A. Hockman at Standard Telecommunications Laboratory in England. In 1966 they1 predicted on the basis of theoretical considerations and preliminary experimental measurements that a loss of less than 200dB/km could be attained by purification of the bulk glass and perfection of the processing of clad glass fibers.
© 1975 Optical Society of America
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