IEC 61755-2-2:2022

IEC 61755-2-2 ®
Edition 2.0 2022-09
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Fibre optic interconnecting devices and passive components – Connector
optical interfaces for single-mode fibres –
Part 2-2: Connection parameters of dispersion unshifted physically contacting
fibres – Angled
Dispositifs d’interconnexion et composants passifs fibroniques – Interfaces
optiques des connecteurs pour fibres unimodales –
Partie 2-2: Paramètres de connexion des fibres en contact physique à dispersion
non décalée – avec angle
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IEC 61755-2-2 ®
Edition 2.0 2022-09
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Fibre optic interconnecting devices and passive components – Connector optical

interfaces for single-mode fibres –

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

fibres – Angled
Dispositifs d’interconnexion et composants passifs fibroniques – Interfaces

optiques des connecteurs pour fibres unimodales –

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

non décalée – avec angle
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 33.180.20 ISBN 978-2-8322-5698-5

– 2 – IEC 61755-2-2:2022 © 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 . 6
5.1 General . 6
5.2 Attenuation grades and criteria . 7
5.3 Visual requirements for return loss grades . 8
Annex A (informative) Return loss model on angled connections . 10
Bibliography . 11

Figure 1 – Lateral offset and angular offset versus attenuation, η , for single-
combined
mode fibre with 8,9 µm MFD at 1 310 nm . 8

Table 1 – Single-mode random mate attenuation grades . 6
Table 2 – Single-mode return loss grades for APC (8°) . 6
Table 3 – MFD and fibre core nominal index of refraction . 7
Table 4 – Visual requirements for single-mode angle polished (APC) fibres
SM APC (RL ≥ 60 dB) . 9

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

Part 2-2: Connection parameters of dispersion
unshifted physically contacting fibres – Angled

FOREWORD
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IEC 61755-2-2 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 requirements;
b) reconsideration of the whole parts of the text to avoid misuse of the standard.

– 4 – IEC 61755-2-2:2022 © IEC 2022
The text of this International Standard is based on the following documents:
Draft Report on voting
86B/4640/FDIS 86B/4661/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 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.
IMPORTANT – The "colour inside" logo on the cover page of this document indicates that it
contains colours which are considered to be useful for the correct understanding of its
contents. Users should therefore print this document using a colour printer.

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

Part 2-2: Connection parameters of dispersion
unshifted physicall
...