IEC PAS 61755-3-32:2007

Fibre optic connector optical interfaces - Part 3-32: Optical interface - 8 degrees angled-PC end-face thermoset rectangular ferrule, single mode fibres

This PAS defines certain dimensional limits that an angled PC end-face multi-fibre rectangular ferrule having two guide-holes for positioning two alignment pins and using a thermoset material with a Young's modulus of 20-25 GPa has to meet in order to comply with specific requirements for interconnections. Ferrules made from the material specified in this PAS are suitable for use in category C as defined in IEC 61753-1. A PAS is a technical specification not fulfilling the requirements for a standard but made available to the public.

General Information

• Status: Replaced
• Publication Date: 08-Oct-2007
• ICS: 33.180.20 - Fibre optic interconnecting devices
• Technical Committee: SC 86B - Fibre optic interconnecting devices and passive components
• Current Stage: DELPUB - Deleted Publication
• Completion Date: 12-Jun-2015

Relations

• Replaced By: IEC 61755-3-32:2015 - Fibre optic interconnecting devices and passive components - Connector optical interfaces - Part 3-32: Connector parameters of non-dispersion shifted single mode physically contacting fibres - Angled thermoset epoxy rectangular ferrules
• Effective Date: 05-Sep-2023

Standards Content (Sample)

IEC/PAS 61755-3-32
Edition 1.0 2007-10
PUBLICLY AVAILABLE
SPECIFICATION
PRE-STANDARD
Fibre optic connector optical interfaces –
Part 3-32: Optical interface – 8 degrees angled-PC end-face thermoset
rectangular ferrule, single mode fibres

IEC/PAS 61755-3-32:2007(E)
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IEC/PAS 61755-3-32
Edition 1.0 2007-10
PUBLICLY AVAILABLE
SPECIFICATION
PRE-STANDARD
Fibre optic connector optical interfaces –
Part 3-32: Optical interface – 8 degrees angled-PC end-face thermoset
rectangular ferrule, single mode fibres

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
PRICE CODE
M
ICS 33.180.20 ISBN 2-8318-9329-1

– 2 – PAS 61755-3-32 © IEC:2007(E)
CONTENTS
FOREWORD.3

Scope.5
2 Normative references.5
3 Description .5
4 Optical interface parameters .6
4.1 End-face parameters related to attenuation.6
4.2 End-face parameters related to physical contact .11

Figure 1 – Fibre core lateral location .6
Figure 2 – Alignment pin .8
Figure 3 – End-face parameters related to attenuation.8
Figure 4 – End-face geometry parameters related to physical contact .11

Table 1 – Optical interface parameter values related to attenuation for 4,4 mm x 2,5 mm
rectangular ferrules with two fibres fixed.9
Table 2 – Optical interface parameter values related to attenuation for 4,4 mm × 2,5 mm

rectangular ferrules with four, eight, ten and twelve fibres fixed .9
Table 3 – Optical interface parameter values related to attenuation for 6,4 mm × 2,5 mm
rectangular ferrules with two fibres fixed.10
Table 4 – Optical interface parameter values related to attenuation for 6,4 mm × 2,5 mm
rectangular ferrules with four, eight, ten and twelve fibres fixed .10
Table 5 – End-face geometry parameters related to physical contact .12

PAS 61755-3-32 © IEC:2007(E) – 3 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
FIBRE OPTIC CONNECTOR OPTICAL INTERFACES –

Part 3-32: Optical interface – 8 degrees angled-PC end-face thermoset
rectangular ferrule, single mode fibres

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-
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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
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3) IEC Publications have the form of recommendations for international use and are accepted by IEC National
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4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications
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between any IEC Publication and the corresponding national or regional publication shall be clearly indicated in
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5) IEC provides no marking procedure to indicate its approval and cannot be rendered responsible for any
equipment declared to be in conformity with an IEC Publication.
6) All users should ensure that they have the latest edition of this publication.
7) No liability shall attach to IEC or its directors, employees, servants or agents including individual experts and
members of its technical committees and IEC National Committees for any personal injury, property damage or
other damage of any nature whatsoever, whether direct or indirect, or for costs (including legal fees) and
expenses arising out of the publication, use of, or reliance upon, this IEC Publication or any other IEC
Publications.
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) The International Electrotechnical Commission (IEC) draws attention to the fact that it is claimed that compliance
with this document may involve the use of one or more of three patents concerning the fibre protrusion given in
Clause 4, Figure 4 and Table 5.
IEC takes no position concerning the evidence, validity and scope of this patent right.
The holders of these patent rights have assured the IEC that he/she is willing to negotiate licenses under
reasonable and non-discriminatory terms and conditions with applicants throughout the world. In this respect, the
statement of the holder of this patent right is registered with the IEC. Information may be obtained from:
Corning Cable Systems LLC
c/o Legal Department
P.O. Box 489
800 17th Street NW
Hickory, NC 28603-0489
USA
Intellectual Property Center
Nippon Telegraph and Telephone Corporation
3-9-11, Midoricho, Musashino-shi, Tokyo 180-8585
Japan
– 4 – PAS 61755-3-32 © IEC:2007(E)
US Conec Ltd.
1555 4th Avenue SE
PO Box 2306
Hickory, NC 28603-2306
USA
Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of
patent rights other than those identified above. IEC shall not be held responsible for identifying any or all such
patent rights.
A PAS is a technical specification not fulfilling the requirements for a standard but made
available to the public.
IEC-PAS 61755-3-32 has been processed by subcommittee 86B: Fibre optic interconnecting
devices and passive components, of IEC technical committee 86: Fibre optics.
The text of this PAS is based on the This PAS was approved for
following document: publication by the P-members of the
committee concerned as indicated in
the following document:
Draft PAS Report on voting
86B/2444/NP 86B/2499/RVN
Following publication of this PAS, which is a pre-standard publication, the technical committee
or subcommittee concerned will transform it into an International Standard.
This PAS shall remain valid for an initial maximum period of three years starting from
2007-10. The validity may be extended for a single three-year period, following which it shall be
revised to become another type of normative document or shall be withdrawn.

PAS 61755-3-32 © IEC:2007(E) – 5 –
FIBRE OPTIC CONNECTOR OPTICAL INTERFACES –

Part 3-32: Optical interface – 8 degrees angled-PC end-face thermoset
rectangular ferrule, single mode fibres

1 Scope
This PAS defines certain dimensional limits that an angled PC end-face multi-fibre rectangular
ferrule having two guide-holes for positioning two alignment pins and using a thermoset
material with a Young’s modulus of 20-25 GPa has to meet in order to comply with specific
requirements for interconnections. Ferrules made from the material specified in this PAS are
suitable for use in category C as defined in IEC 61753-1.
2 Normative references
The following referenced documents are indispensable for the application 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.
IEC 61753-1, Fibre optic interconnecting devices and passive components performance
standard – Part 1: General and guidance for performance standard
IEC 61754-5, Fibre optic connector interface – Part 5: Type MT connector family
IEC 61754-7, Fibre optic connector interfaces – Part 7: Type MPO connector family
IEC 61754-10, Fibre optic connector interfaces – Part 10: Type Mini-MPO connector family
IEC 61754-18, Fibre optic connector interfaces – Part 18: Type MT-RJ connector family
IEC 61755-1, Fibre optic connector optical interfaces – Part 1: Optical interfaces for single
mode non-dispersion shifted fibre – General and guidance
3 Description
The performance of the optical interface for an angled PC end-face multi-fibre rectangular
ferrule is determined by the accuracy with which the optical datum targets of two mating
ferrules are aligned with each other. There are three conditions affecting the alignment of two
optical datum targets, lateral alignment, angular alignment and axial alignment.
The specified end face parameters in this PAS are required to provide physical contact
between all fibre cores in the mated rectangular ferrules when the ferrules are placed in fibre
optic connector interfaces described in IEC 61754-5, IEC 61754-7, IEC 61754-10, and IEC
61754-18 and tested to conditions for a controlled environment as defined category C in IEC
61755-1.
The specified lateral and angular parameters are required to provide the performance grades
as specified IEC 61753-1.
Parameters influencing the lateral and angular alignment of the optical fibre axes include
• fibre hole position deviation from designated distance;
• clearance between fibre hole diameter and fibre cladding diameter;
• fibre hole angular misalignment;

– 6 – PAS 61755-3-32 © IEC:2007(E)
• fibre core concentricity relative to the cladding diameter;
• clearance between guide hole diameter and alignment pin diameter;
• the amount of angled PC polishing in axial direction.
Parameters influencing the axial alignment of the optical fibre axes include
• end-face flatness;
• end-face angle in the X-axis;
• end-face angle in the Y-axis;
• fibre protrusion/undercut;
• maximum difference in fibre height among all fibres;
• maximum adjacent fibre height differential.Ferrule compression force and ferrule material
shall be considered together with these parameters.
4 Optical interface parameters
This standard defines the dimensional limits of the angled PC end-face multi-fibre rectangular
ferrule with single mode fibres. It is applicable for up to 12 fibres with an alignment pitch of
0,25 mm.
The optical interface parameters are defined as shown in Figures 1, 2 and 3.
The parameter values are described as shown in Tables 1 to 4.
4.1 End-face parameters related to attenuation
Key
φ A U-V
Y
Guide hole Fibre
X
Designated distance
φ D
x
in Y-direction
U
φ EA
U
V
Designated distance
in X-direction
Ferrule mating centre
E
Figure 1 – Fibre core lateral location

The X-axis is the line passing through two
...