Optical link

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An optical link is a communications link that consists of a single end-to-end optical circuit. A piece of fiber optic cable, or a concatenation of fiber optic cables to make a dark fiber link, is the simplest form of optical link.

Other forms of optical link can include single-"colour" links over a wavelength division multiplex infrastructure, and/or links that use optical amplifiers to compensate for attenuation over long distances.

Other forms of optical links include free-space optical communication links.

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