EN 60793-1-42:2007
(Main)Optical fibres - Part 1-42: Measurement methods and test procedures - Chromatic dispersion
Optical fibres - Part 1-42: Measurement methods and test procedures - Chromatic dispersion
This part of IEC 60793 establishes uniform requirements for measuring the chromatic dispersion of optical fibre, thereby assisting in the inspection of fibres and cables for commercial purposes. Chromatic dispersion varies with wavelength. Some methods and implementations measure the group delay as a function of wavelength and the chromatic dispersion and dispersion slope are deduced from the derivatives (with respect to wavelength) of this data. This differentiation is most often done after the data are fitted to a mathematical model. Other implementations can allow direct measurement (of the chromatic dispersion) at each of the required wavelengths. For some categories of fibre, the chromatic dispersion attributes are specified with the parameters of a specific model. In these cases, the relevant recommendation or standard defines the model appropriate for the definition of the specified parameters. For other fibre categories, the dispersion is specified to be within a given range for one or more specified wavelength intervals. In the latter case, either direct measurements may be made at the wavelength extremes or some fitting model may be used to allow either group delay measurement methods or implementations or storage of a reduced set of parameters that may be used to calculate the interpolated dispersion for particular wavelengths which may not have actual direct measurement values. Annex E gives a general description of chromatic dispersion fitting and outlines a number of fitting equations suitable for use with any of the measurement methods or fibre categories. This standard gives four methods for measuring chromatic dispersion: - method A: phase shift; - method B: spectral group delay in the time domain; - method C: differential phase shift; - method D: interferometry. Methods A, B, and C apply to the measurement of chromatic dispersion of the following fibres over a specified wavelength range: - class A1 graded-index multimode fibres; - category A4f, A4g and A4h multimode fibres; - class B single-mode fibres (all categories). Method D applies to the measurement of chromatic dispersion values of single-mode fibres categories B1, B2, B4 and B5 over the 1 000 nm to 1 700 nm wavelength range. The methods can be applied to laboratory, factory and field measurements of chromatic dispersion, and the wavelength range of the measurements can be tailored as required. Measurements are made at temperature as stated in IEC 60793-1, Table 1 - Standard range of atmospheric conditions (Temperature 23 C 5 C). The methods are suitable for fibre or cable lengths greater than 1 km. They may also be applied to shorter lengths, but accuracy and repeatability may be compromised. Method D is the preferred method for shorter piece fibres (1 m to 10 m). Information common to all methods is contained in Clauses 1-8, and information pertaining to each individual method appears in Annexes A, B, C, and D, respectively.
Lichtwellenleiter - Teil 1-42: Messmethoden und Prüfverfahren - Chromatische Dispersion
Fibres optiques - Partie 1-42: Méthodes de mesure et procédures d'essai - Dispersion chromatique
Optična vlakna - 1-42. del: Metode merjenja in preskusni postopki - Kromatična disperzija (IEC 60793-1-42:2007 (EQV) + corrigendum Jun. 2007)
General Information
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Standards Content (Sample)
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Optical fibres - Part 1-42: Measurement methods and test procedures - Chromatic dispersion (IEC 60793-1-42:2007 (EQV) + corrigendum Jun. 2007)Fibres optiques - Partie 1-42: Méthodes de mesure et procédures d'essai - Dispersion chromatique (IEC 60793-1-42:2007 (EQV) + corrigendum Jun. 2007)Lichtwellenleiter - Teil 1-42: Messmethoden und Prüfverfahren - Chromatische Dispersion (IEC 60793-1-42:2007 (EQV) + corrigendum Jun. 2007)Ta slovenski standard je istoveten z:EN 60793-1-42:2007SIST EN 60793-1-42:2007en,de33.180.10Fibres and cablesICS:SIST EN 60793-1-42:20041DGRPHãþDSLOVENSKI
STANDARDSIST EN 60793-1-42:200701-november-2007
EUROPEAN STANDARD EN 60793-1-42 NORME EUROPÉENNE
EUROPÄISCHE NORM June 2007
CENELEC European Committee for Electrotechnical Standardization Comité Européen de Normalisation Electrotechnique Europäisches Komitee für Elektrotechnische Normung
Central Secretariat: rue de Stassart 35, B - 1050 Brussels
© 2007 CENELEC -
All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.
Ref. No. EN 60793-1-42:2007 E
ICS 33.180.10 Supersedes EN 60793-1-42:2002
English version
Optical fibres -
Part 1-42: Measurement methods and test procedures -
Chromatic dispersion (IEC 60793-1-42:2007 + corrigendum 2007)
Fibres optiques -
Partie 1-42: Méthodes de mesure
et procédures d'essai -
Dispersion chromatique (CEI 60793-1-42:2007 + corrigendum 2007)
Lichtwellenleiter -
Teil 1-42: Messmethoden
und Prüfverfahren -
Chromatische Dispersion (IEC 60793-1-42:2007 + Corrigendum 2007)
This European Standard was approved by CENELEC on 2007-05-01. CENELEC members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration.
Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the Central Secretariat or to any CENELEC member.
This European Standard exists in three official versions (English, French, German). A version in any other language made by translation under the responsibility of a CENELEC member into its own language and notified to the Central Secretariat has the same status as the official versions.
CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Cyprus, the Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom.
EN 60793-1-42:2007 - 2 -
Foreword The text of document 86A/1136/FDIS, future edition 2 of IEC 60793-1-42, prepared by SC 86A, Fibres and cables, of IEC TC 86, Fibre optics, was submitted to the IEC-CENELEC parallel vote and was approved by CENELEC as EN 60793-1-42 on 2007-05-01. This European Standard supersedes EN 60793-1-42:2002. The main changes in EN 60793-1-42:2007 concern the addition of a new Annex E on chromatic dispersion fitting and the applicability to A4 fibres. This standard is to be used in conjunction with EN 60793-1-1. The following dates were fixed: – latest date by which the EN has to be implemented
at national level by publication of an identical
national standard or by endorsement
(dop)
2008-02-01 – latest date by which the national standards conflicting
with the EN have to be withdrawn
(dow)
2010-05-01 Annex ZA has been added by CENELEC. __________ Endorsement notice The text of the International Standard IEC 60793-1-42:2007 and its corrigendum June 2007 was approved by CENELEC as a European Standard without any modification. __________
- 3 - EN 60793-1-42:2007 Annex ZA
(normative)
Normative references to international publications with their corresponding European publications
The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
NOTE
When an international publication has been modified by common modifications, indicated by (mod), the relevant EN/HD applies.
Publication Year Title EN/HD Year
IEC 60793-1-1 2002 Optical fibres -
Part 1-1: Measurement methods and test procedures - General and guidance EN 60793-1-1 2003
IEC 60793-1-41 -1) Optical fibres -
Part 1-41: Measurement methods and test procedures - Bandwidth EN 60793-1-41 20032)
1) Undated reference. 2) Valid edition at date of issue.
INTERNATIONAL STANDARD IECCEI NORME INTERNATIONALE60793-1-42Second editionDeuxième édition2007-04 Optical fibres – Part 1-42: Measurement methods and test procedures – Chromatic dispersion
Fibres optiques – Partie 1-42: Méthodes de mesure et procédures d’essai – Dispersion chromatique V Commission Electrotechnique
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