EN IEC 60793-1-45:2024

SLOVENSKI STANDARD
01-julij-2024
Optična vlakna - 1-45. del: Merilne metode in postopki preskušanja - Premer
osnovnega rodu
Optical fibres - Part 1-45: Measurement methods and test procedures - Mode field
diameter
Lichtwellenleiter - Teil 1-45: Messmethoden und Prüfverfahren - Modenfelddurchmesser
Fibres optiques - Partie 1-45 : Méthodes de mesure et procédures d'essai - Diamètre du
champ de mode
Ta slovenski standard je istoveten z: EN IEC 60793-1-45:2024
ICS:
33.180.10 (Optična) vlakna in kabli Fibres and cables
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD EN IEC 60793-1-45

NORME EUROPÉENNE
EUROPÄISCHE NORM May 2024
ICS 33.180.10 Supersedes EN IEC 60793-1-45:2018
English Version
Optical fibres - Part 1-45: Measurement methods and test
procedures - Mode field diameter
(IEC 60793-1-45:2024)
Fibres optiques - Partie 1-45 : Méthodes de mesure et Lichtwellenleiter - Teil 1-45: Messmethoden und
procédures d'essai - Diamètre du champ de mode Prüfverfahren - Modenfelddurchmesser
(IEC 60793-1-45:2024) (IEC 60793-1-45:2024)
This European Standard was approved by CENELEC on 2024-05-24. 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
© 2024 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
Ref. No. EN IEC 60793-1-45:2024 E

European foreword
The text of document 86A/2300/CDV, future edition 3 of IEC 60793-1-45, prepared by SC 86A "Fibres
and cables" of IEC/TC 86 "Fibre optics" was submitted to the IEC-CENELEC parallel vote and
approved by CENELEC as EN IEC 60793-1-45:2024.
The following dates are fixed:
• latest date by which the document has to be implemented at national (dop) 2025-02-24
level by publication of an identical national standard or by endorsement
• latest date by which the national standards conflicting with the (dow) 2027-05-24
document have to be withdrawn
This document supersedes EN IEC 60793-1-45:2018 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 60793-1-45:2024 was approved by CENELEC as a
European Standard without any modification.
In the official version, for Bibliography, the following note has to be added for the standard indicated:
IEC 60793-2 NOTE Approved as EN IEC 60793-2
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 60793-1-40 - Optical fibres - Part 1-40: Attenuation EN IEC 60793-1-40 -
measurement methods
IEC 60793-1-45 ®
Edition 3.0 2024-04
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Optical fibres –
Part 1-45: Measurement methods and test procedures – Mode field diameter

Fibres optiques –
Partie 1-45 : Méthodes de mesure et procédures d'essai – Diamètre du champ

de mode
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 33.180.10  ISBN 978-2-8322-8639-5

– 2 – IEC 60793-1-45:2024 © IEC 2024
CONTENTS
FOREWORD . 5
1 Scope . 7
2 Normative references . 7
3 Terms, definitions and abbreviated terms . 7
3.1 Terms and definitions . 7
3.2 Abbreviated terms . 7
4 General consideration about mode field diameter . 8
5 Reference test method . 8
6 Apparatus . 8
6.1 General . 8
6.2 Light source . 9
6.3 Input optics . 9
6.4 Input positioner . 9
6.5 Cladding mode stripper . 9
6.6 High-order mode filter . 9
6.7 Output positioner . 9
6.8 Output optics . 10
6.9 Detector . 10
6.10 Computer . 10
7 Sampling and samples . 10
7.1 Sample length . 10
7.2 Sample end face . 10
8 Procedure . 10
9 Calculations . 10
9.1 Basic formulae . 10
9.2 Method A – Direct far-field scan . 10
9.3 Method B – Variable aperture in the far field . 11
9.4 Method C – Near-field scan . 12
10 Results . 13
10.1 Information available with each measurement . 13
10.2 Information available upon request . 13
11 Specification information . 13
Annex A (normative) Requirements specific to method A – Mode field diameter by
direct far-field scan . 14
A.1 Apparatus . 14
A.1.1 General . 14
A.1.2 Scanning detector assembly – Signal detection electronics . 14
A.1.3 Computer. 15
A.2 Procedure . 15
A.3 Calculations . 15
A.3.1 Determine folded power curve . 15
A.3.2 Compute the top (T) and bottom (B) integrals of Formula (1) . 15
A.3.3 Complete the calculation . 16
A.4 Sample data . 16
Annex B (normative) Requirements specific to method B – Mode field diameter by
variable aperture in the far field . 17

IEC 60793-1-45:2024 © IEC 2024 – 3 –
B.1 Apparatus . 17
B.1.1 General . 17
B.1.2 Output variable aperture assembly . 17
B.1.3 Output optics system . 18
B.1.4 Detector assembly and signal detection electronics . 18
B.2 Procedure . 18
B.3 Calculations . 18
B.3.1 Determine complementary aperture function . 18
B.3.2 Complete the integration . 19
B.3.3 Complete the calculation . 19
B.4 Sample data . 19
Annex C (normative) Requirements specific to method C – Mode field diameter by
near-field scan . 20
C.1 Apparatus . 20
C.1.1 General . 20
C.1.2 Magnifying output optics . 20
C.1.3 Scanning detector . 21
C.1.4 Detection electronics . 21
C.2 Procedure . 21
C.3 Calculations . 21
C.3.1 Calculate the centroid . 21
C.3.2 Fold the intensity profile . 22
C.3.3 Compute the integrals .
...