SIST EN IEC 61755-3-1:2024

Fibre optic interconnecting devices and passive components - Connector optical interfaces - Part 3-1: Connector parameters of dispersion unshifted single-mode physically contacting fibres - non-angled 2,5 mm and 1,25 mm diameter cylindrical full zirconia ferrules (IEC 61755-3-1:2024)

IEC 61755-3-1:2024 defines the dimensional limits of the optical interface that are necessary for single-mode fibre optic connectors with 2,5 mm or 1,25 mm diameter cylindrical zirconia (ZrO2) ferrules to meet the specific requirements for fibre-to-fibre interconnection, as defined in IEC 61755-2-1. Ferrules made from the material specified in this document are suitable for use in all the operating service environments defined in IEC 61753-1. Ferrule dimensions and features are contained in the IEC 61754 series of fibre optic connector interface standards.
This second edition cancels and replaces the first edition published in 2006. This edition constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition:
a) normative references have been added;
b) the introduction of an additional optical interface with a different fibre core eccentricity profile. The previous revision of optical interface standard is named "Variant 1: with fibre core axis oriented towards the connector guide key". The additional optical interface is named "Variant 2: with fibre core axis not oriented towards the connector guide key";
c) statements added related to interoperability, where both variants remain intermateable within a given performance grade and backwards compatible to IEC 61755-3-1:2006;
d) The addition of Grade B and Grade C interface requirements for both variants;
e) The addition of a descriptive statistic for the mean fibre core eccentricity (mean value) to describe the distribution of fibre core eccentricity to ensure interoperability;
f) A new informative Annex B to give guidance on the expected attenuation when mated to a reference connector plug;
g) A new informative Annex C to give guidance related to the simulation of optical interface attenuation;
h) A new informative Annex D to give guidance related to estimation of mean fibre eccentricity limits for finite production batch sizes.

Lichtwellenleiter-Verbindungselemente und passive Bauelemente - Optische Schnittstellen von Lichtwellenleiter-Steckverbindern - Teil 3-1: Steckverbinderkennwerte von nicht dispersionsverschobenen physikalisch kontaktierenden Einmoden-Fasern - nicht angeschrägte zylindrische Vollzirkonium-Ferrulen mit 2,5 mm und 1,25 mm Durchmesser (IEC 61755-3-1:2024)

Dispositifs d’interconnexion et composants passifs fibroniques - Interfaces optiques de connecteurs - Partie 3-1: Paramètres des connecteurs pour fibres unimodales à dispersion non décalée en contact physique - Ferrules cylindriques sans angle en zircone pleine de 2,5 mm et 1,25 mm de diamètre (IEC 61755-3-1:2024)

IEC 61755-3-1:2024 spécifie les limites dimensionnelles des interfaces optiques à respecter pour que les connecteurs optiques à fibres unimodales équipés de ferrules cylindriques en zircone (ZrO2) d’un diamètre de 2,5 mm ou 1,25 mm répondent aux exigences particulières d’une interconnexion fibre à fibre telles que définies dans l’IEC 61755-2-1. Cette deuxième édition annule et remplace la première édition parue en 2006. Cette édition constitue une révision technique.
Cette édition inclut les modifications techniques majeures suivantes par rapport à l’édition précédente:
a) l’ajout de références normatives;
b) ’introduction d’une interface optique supplémentaire avec un profil d’excentricité du cœur de la fibre différent. La précédente révision de la norme relative aux interfaces optiques est désignée "Variante 1: avec l’axe de cœur de la fibre orienté vers le détrompeur du connecteur". L’interface optique supplémentaire est désignée "Variante 2: avec l’axe de cœur de la fibre non orienté vers le détrompeur du connecteur";
c) l’ajout de mentions liées à l’interopérabilité, où les deux variantes restent compatibles dans une classe de performance donnée et rétrocompatibles par rapport à l’IEC 61755-3-1:2006;
d) l’ajout d’exigences relatives aux interfaces de Classes B et C pour les deux variantes;
e) l’ajout d’une statistique descriptive pour l’excentricité moyenne du cœur de fibre (valeur moyenne) pour décrire la distribution de l’excentricité du cœur de la fibre afin d’assurer l’interopérabilité;
f) l’ajout d’une nouvelle Annexe B, informative, pour fournir des recommandations concernant l’affaiblissement attendu lors de l’accouplement avec une fiche de connecteur de référence;
g) l’ajout d’une nouvelle Annexe C, informative, pour fournir des recommandations liées à la simulation de l’affaiblissement de l’interface optique;
h) l’ajout d’une nouvelle Annexe D, informative, pour fournir des recommandations liées à l’estimation des limites d’excentricité moyenne de la fibre pour des tailles de lots de production limitées.

Optični spojni elementi in pasivne komponente - Vmesniki optičnih konektorjev - 3-1. del: Parametri konektorjev za disperzijsko nespremenjena optična vlakna z nekotnim fizičnim stikom 2,5 mm in cirkonijevimi cilindričnimi tulkami premera 1,25 mm (IEC 61755-3-1:2024)

General Information

• Status: Published
• Public Enquiry End Date: 07-Sep-2023
• Publication Date: 09-Jun-2024
• ICS: 33.180.20 - Fibre optic interconnecting devices
• Technical Committee: MOC - Mobile Communications
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 29-May-2024
• Due Date: 03-Aug-2024
• Completion Date: 10-Jun-2024
• Ref Project: EN IEC 61755-3-1:2024 - Fibre optic interconnecting devices and passive components - Connector optical interfaces - Part 3-1: Connector parameters of dispersion unshifted single-mode physically contacting fibres - Non-angled 2,5 mm and 1,25 mm diameter cylindrical full zirconia ferrules

Relations

• Revised: SIST EN 61755-3-1:2009 - Fibre optic connector optical interfaces - Part 3-1: Optical interface, 2,5 mm and 1,25 mm diameter cylindrical full zirconia PC ferrule, single mode fibre (IEC 61755-3-1:2006 (MOD) + corrigendum Jan. 2009)
• Effective Date: 07-Jun-2022

Standards Content (Sample)

SLOVENSKI STANDARD
01-julij-2024
Optični spojni elementi in pasivne komponente - Vmesniki optičnih konektorjev - 3
-1. del: Parametri konektorjev za disperzijsko nespremenjena optična vlakna z
nekotnim fizičnim stikom 2,5 mm in cirkonijevimi cilindričnimi tulkami premera
1,25 mm (IEC 61755-3-1:2024)
Fibre optic interconnecting devices and passive components - Connector optical
interfaces - Part 3-1: Connector parameters of dispersion unshifted single-mode
physically contacting fibres - non-angled 2,5 mm and 1,25 mm diameter cylindrical full
zirconia ferrules (IEC 61755-3-1:2024)
Lichtwellenleiter-Verbindungselemente und passive Bauelemente - Optische
Schnittstellen von Lichtwellenleiter-Steckverbindern - Teil 3-1: Steckverbinderkennwerte
von nicht dispersionsverschobenen physikalisch kontaktierenden Einmoden-Fasern -
nicht angeschrägte zylindrische Vollzirkonium-Ferrulen mit 2,5 mm und 1,25 mm
Durchmesser (IEC 61755-3-1:2024)
Dispositifs d’interconnexion et composants passifs fibroniques - Interfaces optiques de
connecteurs - Partie 3-1: Paramètres des connecteurs pour fibres unimodales à
dispersion non décalée en contact physique - Ferrules cylindriques sans angle en
zircone pleine de 2,5 mm et 1,25 mm de diamètre (IEC 61755-3-1:2024)
Ta slovenski standard je istoveten z: EN IEC 61755-3-1:2024
ICS:
33.180.20 Povezovalne naprave za Fibre optic interconnecting
optična vlakna devices
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD EN IEC 61755-3-1

NORME EUROPÉENNE
EUROPÄISCHE NORM May 2024
ICS 33.180.20 Supersedes EN 61755-3-1:2009
English Version
Fibre optic interconnecting devices and passive components -
Connector optical interfaces - Part 3-1: Connector parameters of
dispersion unshifted single-mode physically contacting fibres -
Non-angled 2,5 mm and 1,25 mm diameter cylindrical full
zirconia ferrules
(IEC 61755-3-1:2024)
Dispositifs d'interconnexion et composants passifs Lichtwellenleiter-Verbindungselemente und passive
fibroniques - Interfaces optiques de connecteurs - Partie 3-1 Bauelemente - Optische Schnittstellen von Lichtwellenleiter-
: Paramètres des connecteurs pour fibres unimodales à Steckverbindern - Teil 3-1: Steckverbinderkennwerte von
dispersion non décalée en contact physique - Ferrules nicht dispersionsverschobenen physikalisch
cylindriques sans angle en zircone pleine de 2,5 mm et 1,25 kontaktierenden Einmoden-Fasern - nicht angeschrägte
mm de diamètre zylindrische Vollzirkonium-Ferrulen mit 2,5 mm und 1,25
(IEC 61755-3-1:2024) mm Durchmesser
(IEC 61755-3-1:2024)
This European Standard was approved by CENELEC on 2024-05-16. 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 61755-3-1:2024 E

European foreword
The text of document 86B/4863/FDIS, future edition 2 of IEC 61755-3-1, prepared by SC 86B "Fibre
optic interconnecting devices and passive components" of IEC/TC 86 "Fibre optics" was submitted to
the IEC-CENELEC parallel vote and approved by CENELEC as EN IEC 61755-3-1:2024.
The following dates are fixed:
• latest date by which the document has to be implemented at national (dop) 2025-02-16
level by publication of an identical national standard or by endorsement
• latest date by which the national standards conflicting with the (dow) 2025-05-16
document have to be withdrawn
This document supersedes EN 61755-3-1:2009 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 61755-3-1:2024 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:
IEC 61300-3-47 NOTE Approved as EN 61300-3-47
IEC 61753-1 NOTE Approved as EN IEC 61753-1
IEC 61754 (series) NOTE Approved as EN 61754 (series)
IEC 61755-2-1 NOTE Approved as EN IEC 61755-2-1
IEC 61755-2-4 NOTE Approved as EN 61755-2-4
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 61755-1 2022 Fibre optic interconnecting devices and passive EN IEC 61755-1 2022
components - Connector optical interfaces for
single-mode fibres - Part 1: Optical interfaces
for dispersion unshifted fibres - General and
guidance
IEC 61755-3-1 ®
Edition 2.0 2024-04
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Fibre optic interconnecting devices and passive components – Connector
optical interfaces –
Part 3-1: Connector parameters of dispersion unshifted single-mode physically
contacting fibres – Non-angled 2,5 mm and 1,25 mm diameter cylindrical full
zirconia ferrules
Dispositifs d'interconnexion et composants passifs fibroniques – Interfaces
optiques de connecteurs –
Partie 3-1 : Paramètres des connecteurs pour fibres unimodales à dispersion
non décalée en contact physique – Ferrules cylindriques sans angle en zircone
pleine de 2,5 mm et 1,25 mm de diamètre
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 33.180.20 ISBN 978-2-8322-8584-8
– 2 – IEC 61755-3-1:2024 © IEC 2024
CONTENTS
FOREWORD . 3
1 Scope . 6
2 Normative references . 6
3 Terms and definitions . 6
4 Description . 6
5 Interface parameters . 7
Annex A (informative) Maximum allowed spherical fibre undercut . 12
Annex B (informative) Expected attenuation when mated to reference connector plugs . 14
Annex C (informative) Guidance related to simulation of optical interface attenuation . 15
Annex D (informative) Estimation of average fibre core eccentricity limits as a function
of batch size . 21
Bibliography . 24

Figure 1 – Connector plug endface dimensions . 8
Figure 2 – Geometric requirements for fibre core location after termination . 8
Figure 3 – Ferrule dimensions . 11
Figure A.1 – Allowable undercut as a function of endface radius and apex offset –
4,9 N minimum contact force . 13
Figure A.2 – Allowable undercut as a function of endface radius and apex offset –
2,9 N minimum contact force . 13
Figure C.1 – MFD distribution used in the design curve calculation . 16
Figure C.2 – Resultant fibre core to ferrule eccentricity distribution for Grade B
attenuation . 17
Figure C.3 – Resultant fibre angle distribution for Grade B attenuation . 17
Figure C.4 – Scatterplot of fibre core eccentricities for Grade B attenuation . 19
Figure C.5 – Histogram indicating attenuation distribution of a Grade B optical
interface, Variant 1 to Variant 2 . 20
Figure D.1 – Example histogram showing fibre core eccentricity mean distribution for
Grade B Variant 1 interfaces with a batch size of 25 . 21
Figure D.2 – Illustrative run chart of fibre core eccentricity for different batch sizes
which all conform to the mean and maximum limits . 23

Table 1 – Optical interface parameter values for 2,5 mm diameter ferrule . 9
Table 2 – Optical interface parameter values for 1,25 mm diameter ferrule . 10
Table 3 – Optical interface parameter values for PC ferrules . 11
Table B.1 – Descriptive statistics when performance grades are mated against a Grade
R1 reference interface . 14
Table C.1 – MFD and fibre core nominal index of refraction . 16
Table D.1 – Maximum allowable average fibre core eccentricity limit for different batch
sizes . 22

IEC 61755-3-1:2024 © IEC 2024 – 3 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
FIBRE OPTIC INTERCONNECTING
DEVICES AND PASSIVE COMPONENTS –
CONNECTOR OPTICAL INTERFACES –
Part 3-1: Connector parameters of dispersion
unshifted single-mode physically contacting fibres –
Non-angled 2,5 mm and 1,25 mm diameter cylindrical full zirconia ferrules
FOREWORD
1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising
all national electrotechnical committees (IEC National Committees). The object of IEC is to promote international
co-operation on all questions concerning standardization in the electrical and electronic fields. To this end and
in addition to other activities, IEC publishes International Standards, Technical Specifications, Technical Reports,
Publicly Available Specifications (PAS) and Guides (hereafter referred to as "IEC Publication(s)"). Their
preparation is entrusted to technical committees; any IEC National Committee interested in the subject dealt with
may participate in this preparatory work. International, governmental and non-governmental organizations liaising
with the IEC also participate in this preparation. IEC collaborates closely with the International Organization for
Standardization (ISO) in accordance with conditions determined by agreement between the two organizations.
2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international
consensus of opinion on the relevant subjects since each technical committee has representation from all
interested IEC National Committees.
3) IEC Publications have the form of recommendations for international use and are accepted by IEC National
Committees in that sense. While all reasonable efforts are made to ensure that the technical content of IEC
Publications is accurate, IEC cannot be held responsible
...