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Area Optical fibre communication / Propagation characteristics

IEV ref731-03-84

en
acceptance angle
half the vertex angle of that cone within which optical power may be coupled into bound modes of an optical fibre

Note 1 – Acceptance angle is a function of position on the entrance face of the core when the refractive index is a function of radius in the core. In that case, it is:

arcsin [ n 2 ( r ) n 2 2 ] 1/2 MathType@MTEF@5@5@+=feaagCart1ev2aqatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLnhiov2DGi1BTfMBaeXatLxBI9gBaerbbjxAHXgarqqtubsr4rNCHbGeaGqipG0dh9qqWrVepG0dbbL8F4rqqrVepeea0xe9LqFf0xc9q8qqaqFn0lXdHiVcFbIOFHK8Feea0dXdar=Jb9hs0dXdHuk9fr=xfr=xfrpeWZqaaeqabiGaciGacaqadmaadaqaaqaaaOqaaiaabggacaqGYbGaae4yaiaabohacaqGPbGaaeOBamaadmaabaGaamOBamaaCaaaleqabaGaaGOmaaaakmaabmaabaGaamOCaaGaayjkaiaawMcaaiabgkHiTiaad6gadaqhaaWcbaGaaGOmaaqaaiaaikdaaaaakiaawUfacaGLDbaadaahaaWcbeqaamaalyaabaGaaGymaaqaaiaaikdaaaaaaaaa@4680@

where n (r) is the refractive index and n2 is the minimum refractive index of the cladding.

Note 2 – Power may be coupled into leaky modes at angles exceeding the acceptance angle.


fr
angle d'admission, m
demi-angle au sommet du cône qui contient la puissance rayonnante susceptible de produire des modes liés à l'entrée d'une fibre optique

Note 1 – L'angle d'admission dépend de la position sur la face d'entrée de la fibre si l'indice de réfraction varie radialement dans le coeur. Il est alors égal à:

arcsin [ n 2 ( r ) n 2 2 ] 1/2 MathType@MTEF@5@5@+=feaagCart1ev2aqatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLnhiov2DGi1BTfMBaeXatLxBI9gBaerbbjxAHXgarqqtubsr4rNCHbGeaGqipG0dh9qqWrVepG0dbbL8F4rqqrVepeea0xe9LqFf0xc9q8qqaqFn0lXdHiVcFbIOFHK8Feea0dXdar=Jb9hs0dXdHuk9fr=xfr=xfrpeWZqaaeqabiGaciGacaqadmaadaqaaqaaaOqaaiaabggacaqGYbGaae4yaiaabohacaqGPbGaaeOBamaadmaabaGaamOBamaaCaaaleqabaGaaGOmaaaakmaabmaabaGaamOCaaGaayjkaiaawMcaaiabgkHiTiaad6gadaqhaaWcbaGaaGOmaaqaaiaaikdaaaaakiaawUfacaGLDbaadaahaaWcbeqaamaalyaabaGaaGymaaqaaiaaikdaaaaaaaaa@4680@

n(r) est l'indice à la distance r de l'axe de la fibre et n2 l'indice minimal dans la gaine.

Note 2 – La puissance rayonnante extérieure au cône qui définit l'angle d'admission peut produire des modes de fuite.


ar
زاوية القبول

de
Akzeptanzwinkel, m

es
ángulo de admisión

fi
hyväksymiskulma

it
angolo di accettanza

ko
수광각

ja
受光角

pl
kąt wejścia
kąt akceptacji

pt
ângulo de admissão
ângulo de aceitação

sv
acceptansvinkel

Publication date: 1991-10
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