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Launch numerical aperture
Numerical aperture of an optical system used to couple power into an optical fiber From Wikipedia, the free encyclopedia
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In telecommunications, launch numerical aperture (LNA) is the numerical aperture of an optical system used to couple (launch) power into an optical fiber.
 | This article relies largely or entirely on a single source. (March 2025) |
LNA may differ from the stated NA of a final focusing element if, for example, that element is underfilled or the focus is other than that for which the element is specified. LNA is one of the parameters that determine the initial distribution of power among the modes of an optical fiber.
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References
This article incorporates public domain material from Federal Standard 1037C. General Services Administration. Archived from the original on 22 January 2022. (in support of MIL-STD-188).
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