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Area Optical fibre communication / Propagation characteristics

IEV ref731-03-63

Symbol
V

en
normalized frequency
V number
in an optical fibre a dimensionless quantity, denoted by V, given by

V= 2πa λ ( n 1 2 n 2 2 ) 1/2 MathType@MTEF@5@5@+=feaagCart1ev2aqatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLnhiov2DGi1BTfMBaeXatLxBI9gBaerbbjxAHXgarqqtubsr4rNCHbGeaGqipG0dh9qqWrVepG0dbbL8F4rqqrVepeea0xe9LqFf0xc9q8qqaqFn0lXdHiVcFbIOFHK8Feea0dXdar=Jb9hs0dXdHuk9fr=xfr=xfrpeWZqaaeqabiGaciGacaqadmaadaqaaqaaaOqaaiaadAfacqGH9aqpdaWcaaqaaiaaikdaiiaacqWFapaCcaWGHbaabaGaeq4UdWgaamaabmaabaGaamOBamaaDaaaleaacaaIXaaabaGaaGOmaaaakiabgkHiTiaad6gadaqhaaWcbaGaaGOmaaqaaiaaikdaaaaakiaawIcacaGLPaaadaahaaWcbeqaamaalyaabaGaaGymaaqaaiaaikdaaaaaaaaa@45C9@

where:
a is the fibre core radius,
λ is wavelength in vacuum, and
n1 and n2 are the maximum refractive index in the core and refractive index of the innermost homogenous cladding, respectively


fr
fréquence normée, f
grandeur sans dimension définie pour une fibre optique par la formule:

V= 2πa λ ( n 1 2 n 2 2 ) 1/2 MathType@MTEF@5@5@+=feaagCart1ev2aqatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLnhiov2DGi1BTfMBaeXatLxBI9gBaerbbjxAHXgarqqtubsr4rNCHbGeaGqipG0dh9qqWrVepG0dbbL8F4rqqrVepeea0xe9LqFf0xc9q8qqaqFn0lXdHiVcFbIOFHK8Feea0dXdar=Jb9hs0dXdHuk9fr=xfr=xfrpeWZqaaeqabiGaciGacaqadmaadaqaaqaaaOqaaiaadAfacqGH9aqpdaWcaaqaaiaaikdaiiaacqWFapaCcaWGHbaabaGaeq4UdWgaamaabmaabaGaamOBamaaDaaaleaacaaIXaaabaGaaGOmaaaakiabgkHiTiaad6gadaqhaaWcbaGaaGOmaaqaaiaaikdaaaaakiaawIcacaGLPaaadaahaaWcbeqaamaalyaabaGaaGymaaqaaiaaikdaaaaaaaaa@45C9@

où:
a est le rayon du coeur,
λ est la longueur d'onde dans le vide,
n1 est l'indice de réfraction maximal dans le coeur,
n2 est l'indice de réfraction de la gaine homogène la plus interne


ar
التردد الطبيعي

de
normierte Frequenz, f

es
frecuencia normalizada
número V

fi
normaalistettu taajuus
V-luku

it
frequenza normalizzata

ko
정규화 주파수

ja
規格化周波数

pl
częstotliwość unormowana

pt
frequência normalizada

sv
normaliserad frekvens

Publication date: 1991-10
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