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An optical link is a telecommunications link that consists of a single end-to-end optical circuit. A cable of optical fibers, possibly concatenated into a dark fiber link, is the simplest form of an optical link.[1][2]
Other forms of optical link can include single-"colour" links over a wavelength-division multiplexing infrastructure, and/or links that use optical amplifiers to compensate for attenuation over long distances.[3]
Other forms of optical links include free-space optical telecommunication links.
In the rail transport sector, optical links are used in two forms depending on whether the feeding station is a main station or not. Thus main stations are called 'long halls', and all remaining stations are said to be 'short halls'.
^III, Charles H. Cox (2 November 2006). Analog Optical Links: Theory and Practice. Cambridge University Press. pp. 1–2. ISBN 978-0-521-02778-6.
^Koike, Yasuhiro (16 February 2015). Fundamentals of Plastic Optical Fibers. John Wiley & Sons. p. 119. ISBN 978-3-527-41006-4.
^Hemmati, Hamid (5 June 2006). Deep Space Optical Communications. John Wiley & Sons. p. 91. ISBN 978-0-470-04240-3.
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