| Single-mode Optical Fiber |
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| CATEGORIES ABOUT SINGLE-MODE OPTICAL FIBER | |
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Data rates are limited by Polarization Mode Dispersion and Chromatic Dispersion . The lowest order bound mode is ascertained for the wavelength of interest by solving Maxwell's Equations for the boundary conditions imposed by the fiber, e.g., Core (spot) size and the refractive indices of the core and Cladding . The solution of Maxwell's equations for the lowest order bound mode will permit a pair of orthogonally polarized fields in the fiber, and this is the usual case in a Communication fiber. In step-index guides, single-mode Operation occurs when the Normalized Frequency , ''V'', is less than 2.405. For Power -law profiles, single-mode operation occurs for a normalized frequency, ''V'', less than approximately where ''g'' is the profile parameter. In practice, the orthogonal polarizations may not be associated with degenerate modes. There are a number of special types of single-mode optical fiber which have been chemically or physically altered to give special properties, such as Dispersion Shifted Fiber . Equipment for Single mode fiber is more expensive than equipment for Multi-mode Optical Fiber , but the single mode fiber itself is usually cheaper in bulk. Single-mode fibers are also known as monomode optical fibers, '''single-mode optical waveguides''', and '''unimode fibers'''. SEE ALSO REFERENCES |
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