Launch numerical aperture
- Launch numerical aperture
In telecommunications, launch numerical aperture (LNA) is the numerical aperture of an optical system used to couple (launch) power into an optical fiber.
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.
References
*Federal Standard 1037C
*MIL-STD-188
Wikimedia Foundation.
2010.
Look at other dictionaries:
Numerical aperture — The numerical aperture with respect to a point P depends on the half angle θ of the maximum cone of light that can enter or exit the lens. In optics, the numerical aperture (NA) of an optical system is a dimensionless number that characterizes… … Wikipedia
List of electronics topics — Alphabetization has been neglected in some parts of this article (the b section in particular). You can help by editing it. This is a list of communications, computers, electronic circuits, fiberoptics, microelectronics, medical electronics,… … Wikipedia
LNA — is a three letter acronym that may stand for: Electronics/Telecom * Low noise amplifier * Launch numerical aperture * Local network adapter * Local network attachment * Logistics net assessment Biology * Linolenic acid * Locked nucleic acid *… … Wikipedia
входная числовая апертура — Числовая апертура оптической системы, характеризующая реальную оптическую мощность на входе световода. В отличие от фиксированного показателя числовой апертуры NA, который фирмы изготовители устанавливают для каждого типа оптического волокна,… … Справочник технического переводчика
Optical fiber — A bundle of optical fibers A TOSLINK fiber optic audio c … Wikipedia
Blu-ray Disc — Blue ray redirects here. For the fish of the same name, see Neoraja caerulea. Blu ray Disc Media type … Wikipedia
Double patterning — is a class of technologies developed for photolithography to enhance the feature density. For the semiconductor industry, double patterning is the only lithography technique to be used for the 32 nm and 22 nm half pitch nodes in 2008 2009 and… … Wikipedia
Lichtwellenleiter — Kunststoff Lichtwellenleiter LWL Patchkabel konfektionier … Deutsch Wikipedia
HD DVD — Media type High density optical disc Encoding … Wikipedia
Cutback technique — In telecommunications, a cutback technique is a destructive technique for determining certain optical fiber transmission characteristics, such as attenuation and bandwidth. Contents 1 Procedure 2 Benefits 3 Attenuation measurement … Wikipedia