EN IEC 61744:2023
(Main)Calibration of fibre optic chromatic dispersion test sets
Calibration of fibre optic chromatic dispersion test sets
IEC 61744:2023 provides standard procedures for the calibration of optical fibre chromatic dispersion (CD) test sets. This document is applicable to all types of CD test sets, with the exception that measurements on multimode optical fibres are excluded. The purpose of this document is to define a standard procedure for calibrating optical fibre chromatic dispersion (CD) test sets. The detailed calibration steps used vary according to the measurement technique used in the CD test set. Whilst it is acknowledged that chromatic dispersion also occurs in multimode fibre and this fibre can be measured on many CD test sets, this document will restrict discussion to single mode fibre measurements applications only. The purpose of the procedures outlined in this document is to focus manufacturers and users of CD test sets toward the reduction of measurement uncertainty in chromatic dispersion determination in optical fibres under all applicable conditions. The procedures apply to calibration laboratories and to the manufacturers or users of CD test sets for the purpose of a) calibrating CD test sets, and b) evaluating the level of performance of the instrument. Use of the procedures also allows correct evaluation of CD test set uncertainty, relative and traceable to appropriate (for example, national) standards. This third edition cancels and replaces the second edition published in 2005. This edition constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition: a) updated terms and definitions; b) the use of a reference fibre standard for calibration is now allowed and at the same level as the other calibration method; c) Annex B was split into a new Annex B (on calibration uncertainty, still normative) and a new Annex C (on uncertainty at operating conditions, informative); d) removed former C.3.4 on interferometric method since this method is no longer supported in IEC 60793-1-42; e) removed Annex D and other references in text to calibration compensation to align with other calibration documents; f) removed Annex E and other references in text to use of air wavelength since it is not used in the fibre domain.
Kalibrierung von Prüfaufbauten zur Bestimmung der chromatischen Dispersion
Étalonnage des ensembles d'essai de la dispersion chromatique fibronique
IEC 61744:2023 fournit des procédures normales pour l’étalonnage des ensembles d’essai de la dispersion chromatique (CD) des fibres optiques. Le présent document s’applique à tous les types d’ensembles d’essai CD, à l’exception des mesures sur des fibres optiques multimodales.Le présent document a pour objet de définir une procédure normale pour l’étalonnage des ensembles d’essai de la dispersion chromatique (CD) des fibres optiques. Les étapes détaillées de l’étalonnage varient selon la technique de mesure utilisée sur l’ensemble d’essai CD. Tandis qu’il est admis que la dispersion chromatique se produit également dans des fibres multimodales et que ces fibres peuvent être mesurées sur plusieurs ensembles d’essai CD, le présent document limite l’étude uniquement aux mesures sur des fibres unimodales.Les procédures décrites dans le présent document ont pour objet d’attirer l’attention des fabricants et des utilisateurs des ens embles d’essai CD sur la réduction de l’incertitude de mesure relative à la détermination de la dispersion chromatique dans des fibres optiques, dans toutes les conditions applicables. Les procédures s’appliquent aux laboratoires d’étalonnage et aux fabricants ou utilisateurs des ensembles d’essai CD à des fins: a) d’étalonnage des ensembles d’essai CD; et b) d’évaluation du niveau de performance de l’instrument. L’utilisation des procédures permet aussi une évaluation correcte de l’incertitude de l’ensemble d’essai CD, relative et traçable, par rapport à des étalons appropriés (par exemple des étalons nationaux). constitue une révision technique. Cette édition inclut les modifications techniques majeures suivantes par rapport à l’édition précédente: a) mise à jour des termes et définitions; b) l’utilisation d’une fibre de référence (normale) pour l’étalonnage est désormais autorisée et est considérée assurer le même niveau que les autres méthodes d’étalonnage; c) l’Annexe B a été scindée en une nouvelle Annexe B (sur l’incertitude d’étalonnage, qui reste une annexe normative) et en une nouvelle Annexe C (sur l’incertitude dans les conditions de fonctionnement, informative); d) suppression de l’ancien C.3.4 sur la méthode interférométrique, car celle-ci n’est plus prise en charge dans l’IEC 60793-1-42; e) suppression de l’Annexe D et des autres références dans le texte à la compensation d’étalonnage, afin d’assurer la cohérence avec les autres documents d’étalonnage; f) suppression de l’Annexe E et des autres références dans le texte à l’utilisation de longueur d’onde dans l’air, car cela n’est pas utilisé dans le domaine fibronique.
Umerjanje pribora za preskušanje kromatske disperzije (IEC 61744:2023)
Standard IEC 61744:2023 določa standardne postopke za umerjanje pribora za preskušanje kromatske disperzije (CD). Ta dokument se uporablja za vse vrste pribora za preskušanje kromatske disperzije, pri čemer so izvzete meritve na večrodovnih optičnih vlaknih. Namen tega dokumenta je opredeliti standardni postopek za umerjanje pribora za preskušanje kromatske disperzije. Uporaba podrobnih korakov umerjanja se razlikuje glede na tehniko merjenja, uporabljeno v priboru za preskušanje kromatske disperzije. Čeprav je znano, da se kromatska disperzija pojavlja tudi v večrodovnih vlaknih in je ta vlakna mogoče izmeriti s številnim priborom za preskušanje kromatske disperzije, ta dokument obravnava samo meritve enorodnih vlaken. Namen postopkov, opisanih v tem dokumentu, je usmeriti proizvajalce in uporabnike pribora za preskušanje kromatske disperzije k zmanjšanju negotovosti meritev pri določanju kromatske disperzije v optičnih vlaknih pod vsemi veljavnimi pogoji. Postopki se uporabljajo za laboratorije, ki izvajajo umerjanje, ter proizvajalce in uporabnike pribora za preskušanje kromatske disperzije za namene
a) umerjanja pribora za preskušanje kromatske disperzije in
b) ocenjevanja ravni zmogljivosti instrumenta.
Uporaba postopkov prav tako omogoča pravilno vrednotenje negotovosti pribora za preskušanje kromatske disperzije v povezavi z ustreznimi (na primer nacionalnimi) standardi. Tretja izdaja razveljavlja in nadomešča drugo izdajo, objavljeno leta 2005. Ta izdaja je tehnično popravljena izdaja. Ta izdaja v primerjavi s prejšnjo vključuje naslednje pomembne tehnične spremembe:
a) Izrazi in definicije so posodobljeni.
b) Uporaba referenčnega standarda o vlaknih za umerjanje je zdaj dovoljena in na enaki ravni kot druga metoda umerjanja.
c) Dodatek B je razdeljen v novi dodatek B (v zvezi z negotovostjo pri umerjanju, še vedno normativni) in dodatek C (v zvezi z negotovostjo pri pogojih delovanja, informativni).
d) Točka C.3.4 o interferometrični metodi je odstranjena, ker ni več podprta v standardu IEC 60793-1-42.
e) Dodatek D in drugi sklici v besedilu na kompenzacijo umerjanja so odstranjeni za uskladitev z drugimi dokumenti o umerjanju.
f) Dodatek F in drugi sklici v besedilu na uporabo valovne dolžine v zraku so odstranjeni, saj se le-ta ne uporablja za vlakna.
General Information
Relations
Standards Content (Sample)
SLOVENSKI STANDARD
01-julij-2023
Umerjanje pribora za preskušanje kromatske disperzije (IEC 61744:2023)
Calibration of fibre optic chromatic dispersion test sets (IEC 61744:2023)
Kalibrierung von Prüfaufbauten zur Bestimmung der chromatischen Dispersion (IEC
61744:2023)
Etalonnage des ensembles d'essai de la dispersion chromatique fibronique (IEC
61744:2023)
Ta slovenski standard je istoveten z: EN IEC 61744:2023
ICS:
33.140 Posebna merilna oprema za Special measuring
uporabo v telekomunikacijah equipment for use in
telecommunications
33.180.01 Sistemi z optičnimi vlakni na Fibre optic systems in
splošno general
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
EUROPEAN STANDARD EN IEC 61744
NORME EUROPÉENNE
EUROPÄISCHE NORM May 2023
ICS 33.180.01 Supersedes EN 61744:2005
English Version
Calibration of fibre optic chromatic dispersion test sets
(IEC 61744:2023)
Étalonnage des ensembles d'essai de la dispersion Kalibrierung von Prüfaufbauten zur Bestimmung der
chromatique fibronique chromatischen Dispersion
(IEC 61744:2023) (IEC 61744:2023)
This European Standard was approved by CENELEC on 2023-05-09. 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 CEN-CENELEC
Management Centre 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 CEN-CENELEC Management Centre has the
same status as the official versions.
CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Croatia, Cyprus, the Czech Republic,
Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the
Netherlands, Norway, Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Türkiye and the United Kingdom.
European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2023 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
Ref. No. EN IEC 61744:2023 E
European foreword
The text of document 86/615/FDIS, future edition 3 of IEC 61744, prepared by IEC/TC 86 "Fibre
optics" was submitted to the IEC-CENELEC parallel vote and approved by CENELEC as
The following dates are fixed:
• latest date by which the document has to be implemented at national (dop) 2024-02-09
level by publication of an identical national standard or by endorsement
• latest date by which the national standards conflicting with the (dow) 2026-05-09
document have to be withdrawn
This document supersedes EN 61744:2005 and all of its amendments and corrigenda (if any).
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CENELEC shall not be held responsible for identifying any or all such patent rights.
Any feedback and questions on this document should be directed to the users’ national committee. A
complete listing of these bodies can be found on the CENELEC website.
Endorsement notice
The text of the International Standard IEC 61744:2023 was approved by CENELEC as a European
Standard without any modification.
In the official version, for Bibliography, the following notes have to be added for the standard indicated:
ISO/IEC 17025 NOTE Approved as EN ISO/IEC 17025
IEC 60793-1-42 NOTE Approved as EN 60793-1-42
IEC 60793-2-50 NOTE Approved as EN IEC 60793-2-50
IEC 60825-1 NOTE Approved as EN 60825-1
IEC 61315 NOTE Approved as EN IEC 61315
Annex ZA
(normative)
Normative references to international publications
with their corresponding European publications
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements 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 1 Where an International Publication has been modified by common modifications, indicated by (mod), the
relevant EN/HD applies.
NOTE 2 Up-to-date information on the latest versions of the European Standards listed in this annex is available
here: www.cencenelec.eu.
Publication Year Title EN/HD Year
IEC 60050-731 - International Electrotechnical Vocabulary - - -
Chapter 731: Optical fibre communication
IEC 62129-1 - Calibration of wavelength/optical frequency EN 62129-1 -
measurement instruments - Part 1: Optical
spectrum analyzers
IEC 62129-2 - Calibration of wavelength/optical frequency EN 62129-2 -
measurement instruments - Part 2:
Michelson interferometer single
wavelength meters
ISO/IEC Guide 98-3 - Uncertainty of measurement - Part 3: - -
Guide to the expression of uncertainty in
measurement (GUM:1995)
IEC 61744 ®
Edition 3.0 2023-04
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Calibration of fibre optic chromatic dispersion test sets
Étalonnage des ensembles d’essai de la dispersion chromatique fibronique
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 33.180.01 ISBN 978-2-8322-6734-9
– 2 – IEC 61744:2023 © IEC 2023
CONTENTS
FOREWORD . 4
0 Introduction . 6
0.1 Chromatic dispersion in optical fibres . 6
0.2 Chromatic dispersion (CD) test sets . 6
0.3 Overview of calibration procedures described in this document . 6
1 Scope . 7
2 Normative references . 7
3 Terms and definitions . 8
4 Calibration . 11
4.1 General . 11
4.2 Preparation for calibration . 12
4.2.1 General advice and organization. 12
4.2.2 Environmental conditions requirements . 12
4.2.3 Measurement equipment requirements . 12
4.2.4 Traceability . 12
4.3 Calibration procedure . 13
5 Wavelength and delay calibration procedure . 13
5.1 Wavelength calibration procedure . 13
5.1.1 General . 13
5.1.2 Discrete sources . 13
5.1.3 Tuneable sources . 14
5.1.4 Uncertainties and reporting . 16
5.2 Delay (dispersion) calibration procedure . 17
5.2.1 General . 17
5.2.2 Equipment and preparation . 17
5.2.3 Calibration procedure . 18
5.2.4 Uncertainties and reporting . 19
6 Calibration using a reference fibre . 19
6.1 General . 19
6.2 Equipment and preparation . 20
6.3 Procedure . 20
6.4 Uncertainties and reporting . 21
7 Documentation . 21
7.1 General . 21
7.2 Calibration certificate contents . 21
Annex A (normative) Mathematical basis for measurement uncertainty calculations . 22
A.1 General . 22
A.2 Deviations . 22
A.3 Uncertainties type A . 22
A.4 Uncertainties type B . 23
A.5 Determining the combined standard uncertainty . 24
A.6 Reporting . 25
Annex B (normative) Calibration uncertainty . 26
B.1 General . 26
B.2 Wavelength and delay calibration uncertainties . 26
B.2.1 Wavelength uncertainties . 26
IEC 61744:2023 © IEC 2023 – 3 –
B.2.2 Optical delay calibration uncertainty . 26
B.2.3 Effect of dispersion modelling . 26
B.3 Uncertainty of a calibration using a reference fibre . 27
Annex C (informative) Uncertainty at operating conditions . 28
C.1 General . 28
C.2 Fibre related uncertainties . 28
C.2.1 Axial fibre strain. 28
C.2.2 Fibre temperature . 28
C.2.3 Second order modes . 29
–
C.2.4 OH absorption . 29
C.2.5 Total fibre loss . 29
C.2.6 Optical reflections . 29
Annex D (informative) Chromatic dispersion . 30
D.1 Chromatic dispersion in fibres . 30
D.2 Description of chromatic dispersion test sets . 30
D.3 Measurement techniques . 31
D.3.1 General . 31
D.3.2 Pulse delay method . 31
D.3.3 Phase shift method . 32
D.3.4 Differential phase shift method .
...
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