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Difference between single-mode fibers and multimode fiber

Light is an electromagnetic wave, which in an optical fiber transmission characteristics of electromagnetic theory can be used to analyze, described by Maxwell's differential equation. A set of solutions of the equation corresponds to the distribution of electromagnetic field of a form, each distribution is a mode of the electromagnetic field. Optical fiber is an optical waveguide material, each beam of light transmission in optical fiber core is a mode of fiber. Multimode optical fiber can transmit multiple modes of an optical waveguide, the total number of transmission mode up to hundreds of thousands die, the fiber core diameter large, common 50um and 62.5um two. Single-mode fiber is only a mode of the waveguide and the core is small, usually about 9.0um.

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