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What is the difference between Single-Mode (SM) and Multi-Mode (MM)?

April 26, 2017mm multi-mode single-mode SM

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What is the difference between Single-Mode (SM) and Multi-Mode (MM)?

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Two basic types of fiber and many different types of fiber optic cables are used today. The two types of fiber are called Single-Mode (SM) and Multi-Mode (MM). SM fiber is more expensive, but more efficient than MM fiber, SM fiber is generally used in situations in which the distances to be covered are greater.