IEC 61755-2-1:2022

Fibre optic interconnecting devices and passive components - Connector optical interfaces for single-mode fibres - Part 2-1: Connection parameters of dispersion unshifted physically contacting fibres - Non-angled

IEC 61755-2-1:2022 defines a set of prescribed conditions for a single-mode fibre optic connection that is maintained in order to satisfy the requirements of attenuation and return loss (RL) performance in a randomly mated pair of non-angled polished physically contacting (PC) fibres. The model uses a Gaussian distribution of light intensity over the specified mode field diameter (MFD) for determination of attenuation performance grades, based on MFD mismatch and the amount of lateral and angular fibre core offsets. Attenuation and RL performance grades are defined in IEC 61755-1. 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:  
addition of normative references and visual requirement tables;
reconsideration of the whole parts of the text to avoid misuse of the standard.

Dispositifs d’interconnexion et composants passifs fibroniques - Interfaces optiques des connecteurs pour fibres unimodales - Partie 2-1: Paramètres de connexion des fibres en contact physique à dispersion non décalée - Sans angle

IEC 61755-2-1:2022 définit un ensemble de conditions prescrites pour maintenir une connexion optique de fibres unimodales permettant de satisfaire aux exigences de performance d’affaiblissement et d’affaiblissement de réflexion (RL) dans une paire de fibres polies en contact physique (PC) sans angle, accouplées sans choix préalable. Le modèle utilise une distribution gaussienne de l’intensité lumineuse sur le diamètre de champ de mode (MFD) spécifié, afin de déterminer les classes de performance d’affaiblissement sur la base de la discordance MFD et de la quantité de décalages latéraux et angulaires des cœurs de fibre. Les classes de performance d’affaiblissement et de RL sont définies dans l’IEC 61755-1. 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) ajout de références normatives et de tableaux d’exigences visuelles; b) réexamen de l’ensemble des parties du texte pour prévenir toute mauvaise utilisation de la norme.

General Information

• Status: Published
• Publication Date: 29-Aug-2022
• ICS: 33.180.20 - Fibre optic interconnecting devices
• ICS: 33.200 - Telecontrol. Telemetering
• Technical Committee: SC 86B - Fibre optic interconnecting devices and passive components
• Current Stage: PPUB - Publication issued
• Start Date: 30-Sep-2022
• Completion Date: 30-Aug-2022

Relations

• Revises: IEC 61755-2-1:2006 - Fibre optic connector optical interfaces - Part 2-1: Optical interface standard single mode non-angled physically contacting fibres
• Effective Date: 05-Sep-2023

Standards Content (Sample)

IEC 61755-2-1 ®
Edition 2.0 2022-08
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Fibre optic interconnecting devices and passive components – Connector
optical interfaces for single-mode fibres –
Part 2-1: Connection parameters of dispersion unshifted physically contacting
fibres – Non-angled
Dispositifs d’interconnexion et composants passifs fibroniques – Interfaces
optiques des connecteurs pour fibres unimodales –
Partie 2-1: Paramètres de connexion des fibres en contact physique à dispersion
non décalée – Sans angle
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IEC 61755-2-1 ®
Edition 2.0 2022-08
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Fibre optic interconnecting devices and passive components – Connector

optical interfaces for single-mode fibres –

Part 2-1: Connection parameters of dispersion unshifted physically contacting

fibres – Non-angled
Dispositifs d’interconnexion et composants passifs fibroniques – Interfaces

optiques des connecteurs pour fibres unimodales –

Partie 2-1: Paramètres de connexion des fibres en contact physique à dispersion

non décalée – Sans angle
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 33.180.20 ISBN 978-2-8322-5630-5

– 2 – IEC 61755-2-1:2022  IEC 2022
CONTENTS
FOREWORD . 3
1 Scope . 5
2 Normative references . 5
3 Terms and definitions . 5
4 Attenuation and return loss grades . 6
5 Criteria for a fit within attenuation and return loss grades . 7
5.1 General . 7
5.2 Attenuation grades and criteria . 7
5.3 Visual requirements for return loss grades . 8
Annex A (informative) Effect of damaged surface layer on non-angled connections . 10
Bibliography . 12

Figure 1 – Lateral offset and angular offset versus attenuation, η , for
combined
single‑mode fibre with 8,9 µm MFD at 1 310 nm . 8
Figure A.1 – Model of the connection of convex polished end faces under compressive load 10
Figure A.2 – High index layer refractive index and thickness versus return loss for a
typical dispersion unshifted single-mode fibre . 11

Table 1 – Single-mode random mate attenuation grades . 6
Table 2 – Single-mode return loss grades . 6
Table 3 – MFD and fibre core nominal index of refraction . 7
Table 4 – Visual requirements for single-mode PC polished fibres with RL grade 2
single-mode (SM) (RL ≥ 45 dB) . 9
Table 5 – Visual requirements for single-mode PC polished fibres with RL grade 3
single-mode (SM) (RL ≥ 35 dB) . 9
Table 6 – Visual requirements for single-mode PC polished fibres with RL grade 4
single-mode (SM) (RL ≥ 26 dB) . 9

INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
FIBRE OPTIC INTERCONNECTING DEVICES AND
PASSIVE COMPONENTS – CONNECTOR OPTICAL
INTERFACES FOR SINGLE-MODE FIBRES –

Part 2-1: Connection parameters of dispersion
unshifted physically contacting fibres – Non-angled

FOREWORD
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IEC 61755-2-1 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 2006. This edition
constitutes a technical revision.
This edition includes the following significant technical changes with respect to the previous
edition:
a) addition of normative references and visual requirement tables;
b) reconsideration of the whole parts of the text to avoid misuse of the standard.

– 4 – IEC 61755-2-1:2022  IEC 2022
The text of this International Standard is based on the following documents:
Draft Report on voting
86B/4629/FDIS 86B/4653/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 in the IEC 61755 series, published 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 und
...