Standard IEC 60793-1-34-ed.3.0 10.2.2021 preview

IEC 60793-1-34-ed.3.0

Optical fibres - Part 1-34: Measurement methods and test procedures - Fibre curl

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STANDARD published on 10.2.2021


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The information about the standard:

Designation standards: IEC 60793-1-34-ed.3.0
Publication date standards: 10.2.2021
SKU: NS-1017491
The number of pages: 36
Approximate weight : 108 g (0.24 lbs)
Country: International technical standard
Category: Technical standards IEC

The category - similar standards:

Fibres and cables

Annotation of standard text IEC 60793-1-34-ed.3.0 :

IEC 60793-1-34:2021 establishes uniform requirements for the mechanical characteristic: fibre curl or latent curvature in uncoated optical fibres, i.e. a specified length of the fibre has been stripped from coating. Fibre curl has been identified as an important parameter for minimizing the splice loss of optical fibres when using passive alignment fusion splicers or active alignment mass fusion splicers.Two methods are recognized for the measurement of fibre curl, in uncoated optical fibres: - method A: side view microscopy; - method B: laser beam scattering. Both methods measure the radius of curvature of an uncoated fibre by determining the amount of deflection that occurs as an unsupported fibre end is rotated about the fibres axis. Method A uses visual or digital video methods to determine the deflection of the fibre while method B uses a line sensor to measure the maximum deflection of one laser beam relative to a reference laser beam. By measuring the deflection behaviour of the fibre as it is rotated about its axis and understanding the geometry of the measuring device, the fibres radius of curvature can be calculated from simple circular models, the derivation of which are given in Annex C. Both methods are applicable to type B optical fibres as described in IEC 60793 (all parts). Method A is the reference test method, used to resolve disputes. This third edition cancels and replaces the second edition published in 2006. This edition constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition: - modification of several derivation equations for laser scattering; - change of angular increment from 10° to 30° to 10° to 45°; - change of Annex B from informative to normative. LIEC 60793-1-34:2021 etablit des exigences uniformes pour les caracteristiques mecaniques: ondulation de fibre ou courbure latente des fibres optiques sans revetement, cest-a-dire quune longueur specifiee de la fibre a ete denudee. Londulation de fibre a ete definie comme etant un parametre important de reduction des pertes depissure des fibres optiques lors de lutilisation de soudeuses par fusion avec alignement passif ou de soudeuses par fusion de masse avec alignement actif. Deux methodes sont reconnues pour la mesure de londulation de fibre, pour les fibres optiques sans revetement: - methode A: par microscopie laterale; - methode B: par diffusion dun faisceau laser. Les deux methodes mesurent le rayon de courbure dune fibre sans revetement en determinant la valeur de la fleche dune extremite de fibre non soutenue soumise a une rotation autour de son axe. La methode A utilise des methodes visuelles ou video numeriques pour determiner la fleche de la fibre tandis que la methode B utilise un capteur de ligne pour mesurer la fleche maximale d’un faisceau laser par rapport a un faisceau laser de reference. En mesurant le comportement de la fleche de la fibre pendant qu’elle est soumise a une rotation autour de son axe et d’apres la configuration du dispositif de mesure, le rayon de courbure de la fibre peut etre calcule a partir de modeles circulaires simples, determines a l’Annexe C. Ces deux methodes sont applicables aux fibres optiques du type B telles que decrites dans la serie IEC 60793 (toutes les parties). La methode A est la methode dessai de reference, utilisee en cas de litige. Cette troisieme edition annule et remplace la deuxieme edition parue en 2006. Cette edition constitue une revision technique. Cette edition inclut les modifications techniques majeures suivantes par rapport a ledition precedente: - modification de plusieurs equations de determination pour la diffusion laser; - modification de lincrement angulaire qui passe de 10° a 30° a 10° a 45°; - changement de statut de lAnnexe B qui devient normative.



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