Transcription of FIBER OPTICS
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FIBER OPTICS
CHAPTER 8 FIBER OPTICS STEP-INDEX FIBERS A. Guided Rays B. Guided Waves C. single -Mode Fibers GRADED-INDEX FIBERS A. Guided Waves B. Propagation Constants and Velocities ATTENUATION AND DISPERSION A. Attenuation B. Dispersion C. Pulse Propagation Dramatic improvements in the development of low-loss materials for optical fibers are responsible for the commercial viability of FIBER -optic communications. Corning Incorpo- rated pioneered the development and manu- facture of ultra-low-loss glass fibers. C 0 R N I N G 272 Fundamentals of PhotonicsBahaa E. A. Saleh, Malvin Carl TeichCopyright 1991 John Wiley & Sons, : 0-471-83965-5 (Hardback); 0-471-2-1374-8 (Electronic)An optical FIBER is a cylindrical dielectric waveguide made of low-loss materials such as silica glass.
fiber, (b) a single-mode step-index fiber, and (c) a multimode graded-index fiber. with constant refractive indices in the core and the cladding are called step-index fibers. In a graded-index fiber the velocity increases with distance from the core axis (since the refractive index decreases).
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