EN IEC 61755-1:2022

Fibre optic interconnecting devices and passive components - Connector optical interfaces for single-mode fibres - Part 1: Optical interfaces for dispersion unshifted fibres - General and guidance

This part of IEC 61755 covers dispersion unshifted single-mode fibre optic connection interfaces. It includes references, document structure details, definitions, and standardised optical connection grades. The grades are based on random mated connections between two optical connector populations according to prescribed characteristics including fibre mode field diameter (MFD) mismatch. It also defines standardized test methods where appropriate.

Lichtwellenleiter - Verbindungselemente und passive Bauteile - Optische Schnittstellen für Einmodenfaser-Steckverbinder - Teil 1: Optische Schnittstellen für nicht-dispersionsverschobene Fasern- Allgemeines und Leitfaden

Dispositifs d’interconnexion et composants passifs fibroniques - Interfaces optiques avec connecteurs pour fibres unimodales - Partie 1: Interfaces optiques pour fibres à dispersion non décalée - Généralités et recommandations

L'IEC 61755-1:2022 document traite des interfaces de connexion fibroniques unimodales à dispersion non décalée. Il comprend des références, des précisions sur la structure du document, des définitions et des classes de connexion optique normalisées. Les classes sont fondées sur des connexions aléatoires entre deux populations de connecteurs optiques selon des caractéristiques exigées, y compris la désadaptation du diamètre du champ de mode (MFD - mode field diameter) de la fibre. Il définit également les méthodes d’essais normalisées, s’il y a lieu. Cette deuxième édition annule et remplace la première édition parue en 2005. Cette édition constitue une révision technique. Cette édition inclut les modifications techniques majeures suivantes par rapport à l’édition précédente: - suppression de la Figure 2, de la Figure 3 et du Tableau 4, et prise en considération de parties du texte dans leur intégralité; - ajout de la méthode d’essai relative à la connexion aléatoire de connecteurs multifibres; - présentation de la nomenclature des variantes de l'emplacement du cœur spécifié; - remplacement de la plage limitée de MFD qui est maintenant conforme à la plage complète de MFD spécifiée dans l’IEC 60793-2-50; - remplacement des références aux normes de fiabilité par des rapports techniques de fiabilité; - nouveau titre général pour la série.

Optični spojni elementi in pasivne komponente - Vmesniki optičnih konektorjev za enorodovna vlakna - 1. del: Optični vmesniki za disperzijsko nespremenjena vlakna - Splošno in smernice (IEC 61755-1:2022)

General Information

• Status: Published
• Publication Date: 20-Oct-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: 21-Oct-2022
• Completion Date: 21-Oct-2022
• Ref Project: SIST EN IEC 61755-1:2022 - Fibre optic interconnecting devices and passive components - Connector optical interfaces for single-mode fibres - Part 1: Optical interfaces for dispersion unshifted fibres - General and guidance (IEC 61755-1:2022)

Relations

• Replaces: EN 61755-1:2006 - Fibre optic connector optical interfaces - Part 1: Optical interfaces for single mode non-dispersion shifted fibres - General and guidance
• Effective Date: 07-Jun-2022

Overview

EN IEC 61755-1:2022 (published by CLC/CENELEC) is the international standard that defines connector optical interfaces for dispersion unshifted single‑mode fibres. This Part 1 provides general guidance and the framework for the IEC 61755 series, specifying how optical interfaces for non‑dispersion‑shifted single‑mode fibres (IEC 60793‑2‑50 class B, nominal MFD 8.6 µm to 9.2 µm) are described, tested and graded. The 2022 edition (Edition 2.0) supersedes the 2006 version and introduces updates such as random‑mate test methods for multifibre connectors and an expanded MFD range.

Key topics and requirements

• Scope and structure: Defines the multi‑part structure of the IEC 61755 series and the hierarchical relationship to mechanical and performance standards.
• Optical datum target: Specifies the reference geometry used to locate the fibre core relative to the connector datum.
• Standardized grades: Establishes optical connection grades based on random mated connections between two connector populations, accounting for variables such as MFD mismatch.
• Key parameters:
  • Lateral and angular misalignment
  • Mode field diameter (MFD)
  • End‑face separation and end‑face angle
  • End‑face high‑index layer (HIL) condition
• Test methods: References and defines standardized test procedures (including random‑mate attenuation tests) and links to IEC 61300 test series for measurements like return loss and attenuation of random‑mated connectors.
• Materials and definitions: Gives terms, definitions and material considerations essential for predictable optical performance.
• Compatibility intent: Ensures products compliant with IEC 61755 interfaces mate reliably without additional cross‑testing.

Applications and who uses this standard

EN IEC 61755-1:2022 is intended for:

• Connector and component manufacturers designing single‑mode fibre connectors and ferrules.
• Test laboratories and QA teams defining measurement procedures for connector attenuation and return loss.
• Network equipment designers and system integrators who need interoperable optical interfaces.
• Procurement and standards compliance teams specifying interface grades for product selection and acceptance.
• Standards bodies and certification organizations harmonizing optical interface requirements.

Practical benefits include predictable mating performance, reduced field compatibility issues, and a common basis for specifying connector optical performance in telecom, datacom and fibre‑optic sensing applications.

Related standards

• IEC 60793‑2‑50 (single‑mode fibre characteristics)
• IEC 61300 series (basic test and measurement procedures; e.g., IEC 61300‑3‑6, ‑3‑34, ‑3‑45)
• IEC 61754 series (mechanical connector interfaces)
• IEC 61753 series (performance standards)
• Other parts of IEC 61755 (Parts 2, 3, etc.) for specific interfaces

Keywords: EN IEC 61755-1:2022, fibre optic connector interfaces, single‑mode fibres, dispersion unshifted, mode field diameter, MFD, random mate, attenuation, return loss, IEC 61755.

Standards Content (Sample)

SLOVENSKI STANDARD
01-december-2022
Nadomešča:
SIST EN 61755-1:2006
Optični spojni elementi in pasivne komponente - Vmesniki optičnih konektorjev za
enorodovna vlakna - 1. del: Optični vmesniki za disperzijsko nespremenjena
vlakna - Splošno in smernice (IEC 61755-1:2022)
Fibre optic interconnecting devices and passive components - Connector optical
interfaces for single-mode fibres - Part 1: Optical interfaces for dispersion unshifted
fibres - General and guidance (IEC 61755-1:2022)
Lichtwellenleiter - Verbindungseinrichtungen und passive Bauelemente - Optische
Schnittstellen für Einmodenfasern - Teil 1: Optische Schnittstellen von nicht-
dispersionsverschobenen Einmodenfasern - Allgemeines und Leitfaden (IEC 61755-
1:2022)
Dispositifs d’interconnexion et composants passifs fibroniques - Interfaces optiques avec
connecteurs pour fibres unimodales - Partie 1: Interfaces optiques pour fibres à
dispersion non décalée - Généralités et recommandations (IEC 61755-1:2022)
Ta slovenski standard je istoveten z: EN IEC 61755-1:2022
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 61755-1

NORME EUROPÉENNE
EUROPÄISCHE NORM October 2022
ICS 33.180.20 Supersedes EN 61755-1:2006;
EN 61755-1:2006/corrigendum Dec. 2006
English Version
Fibre optic interconnecting devices and passive components -
Connector optical interfaces for single-mode fibres - Part 1:
Optical interfaces for dispersion unshifted fibres - General and
guidance
(IEC 61755-1:2022)
Dispositifs d'interconnexion et composants passifs Lichtwellenleiter - Verbindungseinrichtungen und passive
fibroniques - Interfaces optiques avec connecteurs pour Bauelemente - Optische Schnittstellen für Einmodenfasern -
fibres unimodales - Partie 1: Interfaces optiques pour fibres Teil 1: Optische Schnittstellen von nicht-
à dispersion non décalée - Généralités et recommandations dispersionsverschobenen Einmodenfasern - Allgemeines
(IEC 61755-1:2022) und Leitfaden
(IEC 61755-1:2022)
This European Standard was approved by CENELEC on 2022-10-19. 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
© 2022 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
Ref. No. EN IEC 61755-1:2022 E

European foreword
The text of document 86B/4642/FDIS, future edition 2 of IEC 61755-1, 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 61755-1:2022.
The following dates are fixed:
• latest date by which the document has to be implemented at national (dop) 2023-07-19
level by publication of an identical national standard or by endorsement
• latest date by which the national standards conflicting with the (dow) 2023-10-19
document have to be withdrawn
This document supersedes EN 61755-1:2006 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 61755-1:2022 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 60793-2-50 NOTE Harmonized as EN IEC 60793-2-50
IEC 61300-2 (series) NOTE Harmonized as EN 61300-2 (series)
IEC 61300-3 (series) NOTE Harmonized as EN 61300-3 (series)
IEC 61753 (series) NOTE Harmonized as EN 61753 (series)
IEC 61755-3-1 NOTE Harmonized as EN 61755-3-1
IEC 61755-3-7 NOTE Harmonized as EN 61755-3-7
IEC 61755-2 (series) NOTE Harmonized as EN 61755-2 (series)
IEC 61755-3 (series) NOTE Harmonized as EN 61755-3 (series)
IEC 61753-1 NOTE Harmonized as EN IEC 61753-1
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.cenelec.eu.
Publication Year Title EN/HD Year
IEC 61300 series Fibre optic interconnecting devices and EN IEC 61300 series
passive components - Basic test and
measurement procedures
IEC 61300-3-6 - Fibre optic interconnecting devices and EN 61300-3-6 -
passive components - Basic test and
measurement procedures - Part 3-6:
Examinations and measurements - Return
loss
IEC 61300-3-34 - Fibre optic interconnecting devices and EN 61300-3-34 -
passive components - Basic test and
measurement procedures - Part 3-34:
Examinations and measurements -
Attenuation of random mated connectors
IEC 61300-3-45 - Fibre optic interconnecting devices and EN 61300-3-45 -
passive components - Basic test and
measurement procedures - Part 3-45:
Examinations and measurements -
Attenuation of random mated multi-fibre
connectors
IEC 61754 series Fibre optic interconnecting devices and EN 61754 series
passive components - Fibre optic
connector interfaces
IEC 61755-1 ®
Edition 2.0 2022-09
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Fibre optic interconnecting devices and passive components – Connector

optical interfaces for single-mode fibres –

Part 1: Optical interfaces for dispersion unshifted fibres – General and guidance

Dispositifs d'interconnexion et composants passifs fibroniques – Interfaces

optiques avec connecteurs pour fibres unimodales –

Partie 1: Interfaces optiques pour fibres à dispersion non décalée – Généralités

et recommandations
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 33.180.20 ISBN 978-2-8322-5697-8

– 2 – IEC 61755-1:2022 © IEC 2022
CONTENTS
FOREWORD . 3
0 Introduction . 5
0.1 Overview. 5
0.2 Hierarchical relationship . 6
1 Scope . 7
2 Normative references . 7
3 Terms and definitions . 7
4 Structure of the IEC 61755 series . 8
5 Optical datum target . 9
6 Test methods . 10
7 Optical interface grades . 10
8 Key parameters . 11
9 Materials . 12
Bibliography . 13

Figure 1 – Relationship between optical interface standards and interface standards. 6

Table 1 – Multi-part structure of the IEC 61755 series. 9
Table 2 – Single-mode random mate attenuation grades at 1 310 nm (dB) . 11
Table 3 – Single-mode return loss grades at 1 310 nm (dB) . 11

IEC 61755-1:2022 © IEC 2022 – 3 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
FIBRE OPTIC INTERCONNECTING
DEVICES AND PASSIVE COMPONENTS –
CONNECTOR OPTICAL INTERFACES FOR SINGLE-MODE FIBRES –

Part 1: Optical interfaces for dispersion unshifted fibres –
General and guidance
FOREWORD
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8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is
indispensable for the correct application of this publication.
9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of patent
rights. IEC shall not be held responsible for identifying any or all such patent rights.
IEC 61755-1 has been prepared by subcommittee 86B: Fibre optic interconnecting devices and
passive components, of IEC technical committee 86: Fibre optics. It is an International Standard.
This second edition cancels and replaces the first 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) deletion of Figure 2, Figure 3 and Table 4, and consideration of the whole parts of the text;
b) addition of the test method for random mating of the multifibre connectors;
c) introduction of a nomenclature for the specified core location variants;
d) replacement of the limited MFD range, which is now in line with the complete MFD range
specified in IEC 60793-2-50;
– 4 – IEC 61755-1:2022 © IEC 2022
e) replacement of the references to reliability standards to reliability technical reports;
f) new general title for the series.
The text of this document is based on the following documents:
Draft Report on voting
86B/4642/FDIS 86B/4663/RVD
Full information on the voting for its approval can be found in the report on voting indicated in
the above table.
The language used for the development of this International Standard is English.
This document was drafted in accordance with ISO/IEC Directives, Part 2, and developed in
accordance with ISO/IEC Directives, Part 1 and ISO/IEC Directives, IEC Supplement, available
at www.iec.ch/members_experts/refdocs. The main document types developed by IEC are
described in greater detail at www.iec.ch/standardsdev/publications.
A list of all parts of the IEC 61755 series, under the general title Fibre optic interconnecting
devices and passive components – Connector optical interfaces for single-mode fibres, can be
found on the IEC website.
Future documents in this series will carry the new general title as cited above. Titles of existing
documents in this series will be updated at the time of the next edition.
The committee has decided that the contents of this document will remain unchanged until the
stability date indicated on the IEC website under webstore.iec.ch in the data related to the
specific document. At this date, the document will be
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.
IEC 61755-1:2022 © IEC 2022 – 5 –
0 Introduction
0.1 Overview
A connector optical interface standard is a multi-part collection of the geometric, dimensional
and material requirements necessary in order to comply with the optical functionality
specifications for a defined interface between two optical fibres. It consists of those essential
features that are functionally critical to the optical attenuation and return loss performance of
an optical interface in the mated condition.
This series of optical interface stan
...