EN IEC 61755-3-2:2024

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

IEC 61755-3-2:2024 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 polished at an 8° angle to meet the specific requirements for fibre-to-fibre interconnection, as defined in IEC 61755-2-2. Ferrules made from the material specified in this standard 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 are fully backwards compatible to IEC 61755-3-2:2006; d) The addition of Grade B and Grade C interface requirements for both variants; f) 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; g) A new informative Annex B to give guidance on the expected attenuation when mated to a reference connector plug; 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 Bauteile - Optische Schnittstellen für Lichtwellenleiter-Steckverbinder - Teil 3-2: Steckverbinder mit abgeschrägten zylindrischen Zirkonium-Ferrulen mit 2,5 mm und 1,25 mm Durchmesser für nicht-dispersionsverschobene Einmodenfasern mit physikalischem Kontakt

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

IEC 61755-3-2:2024 spécifie les limites dimensionnelles des interfaces optiques à respecter pour que les connecteurs optiques à fibres unimodales équipés de ferrules cylindriques en zircone (ZrO2) polies à un angle de 8°, 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 61755-2-2. Les ferrules constituées du matériau spécifié dans la présente norme sont adaptées à une utilisation dans tous les environnements de service définis dans l’IEC 61753-1. Les dimensions et les caractéristiques des ferrules sont spécifiées dans les normes d’interfaces de connecteurs fibroniques de la série IEC 61754. 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) l’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 entièrement rétrocompatibles par rapport à l’IEC 61755-3-2:2006; 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 - 3-2. del: Parametri konektorjev za disperzijsko nespremenjena optična vlakna s kotnim fizičnim stikom 2,5 mm in cirkonijevimi cilindričnimi tulkami premera 1,25 mm (IEC 61755-3-2:2024)

Standard IEC 61755-3-2:2024 določa dimenzijske mejne vrednosti optičnega vmesnika za potrebe izpolnjevanja posebnih zahtev za spajanje vlaken pri konektorjih za enorodovna optična vlakna s cirkonijevimi cilindričnimi tulkami (ZrO2) premera 2,5 mm ali 1,25 mm, poliranih pod kotom 8 stopinj, kot je opredeljeno v standardu IEC 61755-2-2. Tulke, izdelane iz materialov, ki so določeni v tem standardu, so primerne za uporabo v vseh operativnih storitvenih okoljih, kot je opredeljeno v standardu IEC 61753-1. Dimenzije in lastnosti so vključene v skupino standardov IEC 61754, ki obravnava vmesnike optičnih konektorjev. Druga izdaja razveljavlja in nadomešča prvo izdajo, objavljeno leta 2006. Ta izdaja je tehnično popravljena izdaja. Ta izdaja v primerjavi s prejšnjo vključuje naslednje pomembne tehnične spremembe:
a) dodane so bile zveze s standardi;
b) predstavljen je bil dodaten optični vmesnik z drugačnim profilom ekscentričnosti jedra vlakna. Prejšnja revizija standarda o optičnih vmesnikih se imenuje »Različica 1: os jedra vlakna je usmerjena proti ključu vodila konektorja«.
Dodatni optični vmesnik se imenuje »Različica 2: os jedra vlakna ni usmerjena proti ključu vodila konektorja«;
c) dodane so bile izjave v zvezi z interoperabilnostjo, v katerih je navedeno, da je mogoče obe različici vmesnikov spojiti med sabo znotraj danega razreda zmogljivosti in da sta obe v celoti povratno združljivi s standardom IEC 61755-3-2:2006;
d) za obe različici so bile dodane zahteve za vmesnike razredov B in C;
f) dodana je bila opisna statistika za povprečno ekscentričnost jedra vlakna (srednja vrednost) za opis porazdelitve ekscentričnosti jedra vlakna, da se zagotovi interoperabilnost;
g) dodan je bil nov informativni dodatek B, ki podaja smernice o pričakovanem slabljenju pri spajanju z referenčnim konektorskim vtičem;
h) dodan je bil nov informativni dodatek D, ki podaja smernice v zvezi z oceno povprečnih mejnih vrednosti ekscentričnosti vlakna za končne velikosti proizvodnih serij.

General Information

• Status: Published
• Publication Date: 23-May-2024
• Withdrawal Date: 04-Sep-2022
• ICS: 33.180.20 - Fibre optic interconnecting devices
• Technical Committee: CLC/TC 86BXA - Fibre optic interconnect, passive and connectorised components
• Drafting Committee: IEC/SC 86B - IEC_SC_86B
• Current Stage: 6060 - Document made available - Publishing
• Start Date: 24-May-2024
• Completion Date: 24-May-2024
• Ref Project: SIST EN IEC 61755-3-2:2024 - Fibre optic interconnecting devices and passive components - Connector optical interfaces - Part 3-2: Connector parameters of dispersion unshifted single-mode physically contacting fibres - angled 2,5 mm and 1,25 mm diameter cylindrical full zirconia ferrules (IEC 61755-3-2:2024)

Relations

• Replaces: EN 61755-3-2:2009 - Fibre optic connector optical interfaces - Part 3-2: Optical interface, 2,5 mm and 1,25 mm diameter cylindrical full zirconia ferrules for 8 degrees angled-PC single mode fibres
• Effective Date: 07-Jun-2022

Standards Content (Sample)

SLOVENSKI STANDARD
01-julij-2024
Optični spojni elementi in pasivne komponente - Vmesniki optičnih konektorjev - 3
-2. del: Parametri konektorjev za disperzijsko nespremenjena optična vlakna s
kotnim fizičnim stikom 2,5 mm in cirkonijevimi cilindričnimi tulkami premera 1,25
mm (IEC 61755-3-2:2024)
Fibre optic interconnecting devices and passive components - Connector optical
interfaces - Part 3-2: Connector parameters of dispersion unshifted single-mode
physically contacting fibres - angled 2,5 mm and 1,25 mm diameter cylindrical full
zirconia ferrules (IEC 61755-3-2:2024)
Lichtwellenleiter - Verbindungselemente und passive Bauteile - Optische Schnittstellen
für Lichtwellenleiter-Steckverbinder - Teil 3-2: Steckverbinder mit abgeschrägten
zylindrischen Zirkonium-Ferrulen mit 2,5 mm und 1,25 mm Durchmesser für nicht-
dispersionsverschobene Einmodenfasern mit physikalischem Kontakt (IEC 61755-3-
2:2024)
Dispositifs d’interconnexion et composants passifs fibroniques - Interfaces optiques de
connecteurs - Partie 3-2: Paramètres des connecteurs pour fibres unimodales à
dispersion non décalée en contact physique - Ferrules cylindriques avec angle en
zircone pleine de 2,5 mm et 1,25 mm de diamètre (IEC 61755-3-2:2024)
Ta slovenski standard je istoveten z: EN IEC 61755-3-2:2024
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 61755-3-2

NORME EUROPÉENNE
EUROPÄISCHE NORM May 2024
ICS 33.180.20 Supersedes EN 61755-3-2:2009
English Version
Fibre optic interconnecting devices and passive components -
Connector optical interfaces - Part 3-2: Connector parameters of
dispersion unshifted single-mode physically contacting fibres -
Angled 2,5 mm and 1,25 mm diameter cylindrical full zirconia
ferrules
(IEC 61755-3-2:2024)
Dispositifs d'interconnexion et composants passifs Lichtwellenleiter - Verbindungselemente und passive
fibroniques - Interfaces optiques de connecteurs - Partie 3- Bauteile - Optische Schnittstellen für Lichtwellenleiter-
2: Paramètres des connecteurs pour fibres unimodales à Steckverbinder - Teil 3-2: Steckverbinder mit
dispersion non décalée en contact physique - Ferrules abgeschrägten zylindrischen Zirkonium-Ferrulen mit 2,5
cylindriques avec angle en zircone pleine de 2,5 mm et 1,25 mm und 1,25 mm Durchmesser für nicht-
mm de diamètre dispersionsverschobene Einmodenfasern mit
(IEC 61755-3-2:2024) physikalischem Kontakt
(IEC 61755-3-2:2024)
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 61755-3-2:2024 E

European foreword
The text of document 86B/4864/FDIS, future edition 2 of IEC 61755-3-2, 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 61755-3-2:2024.
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 61755-3-2:2009 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 61755-3-2:2024 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 61755-2-2 NOTE Approved as EN IEC 61755-2-2
IEC 61755-2-5 NOTE Approved as EN 61755-2-5
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 - Fibre optic interconnecting devices and passive EN IEC 61755-1 -
components - Connector optical interfaces for
single-mode fibres - Part 1: Optical interfaces for
dispersion unshifted fibres - General and guidance

IEC 61755-3-2 ®
Edition 2.0 2024-04
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Fibre optic interconnecting devices and passive components – Connector
optical interfaces –
Part 3-2: Connector parameters of dispersion unshifted single-mode physically
contacting fibres – 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 3-2: Paramètres des connecteurs pour fibres unimodales à dispersion
non décalée en contact physique – Ferrules cylindriques avec 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 978-2-8322-8593-0
– 2 – IEC 61755-3-2:2024 © IEC 2024
CONTENTS
FOREWORD . 3
1 Scope . 6
2 Normative references . 6
3 Terms and definitions . 6
4 Description . 7
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 . 20
Bibliography . 23

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 oriented Grade B interfaces . 18
Figure C.5 – Histogram indicating attenuation distribution of a Grade B optical
interface . 19
Figure D.1 – Example histogram showing fibre core eccentricity mean distribution for
Grade B interfaces with a batch size of 25 . 20
Figure D.2 – Illustrative run chart of fibre core eccentricity for different batch sizes
which all conform to the mean and maximum limits . 22

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 APC 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 . 21

IEC 61755-3-2:2024 © IEC 2024 – 3 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
FIBRE OPTIC INTERCONNECTING
DEVICES AND PASSIVE COMPONENTS –
CONNECTOR OPTICAL INTERFACES –
Part 3-2: Connector parameters of dispersion unshifted single-mode
physically contacting fibres – 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
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4) In order
...