IEC TS 62965:2016

IEC TS 62965 ®
Edition 1.0 2016-10
TECHNICAL
SPECIFICATION
SPECIFICATION
TECHNIQUE
Fibre optic interconnecting devices and passive components –
Ferrule assembly and fusion splicer interface dimensions for a fusion splice on
connector
Dispositifs d'interconnexion et composants passifs à fibres optiques –
Dimensions de la férule équipée et de l'interface de l'épissureur par fusion
relatives à une épissure par fusion sur connecteur

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IEC TS 62965 ®
Edition 1.0 2016-10
TECHNICAL
SPECIFICATION
SPECIFICATION
TECHNIQUE
Fibre optic interconnecting devices and passive components –

Ferrule assembly and fusion splicer interface dimensions for a fusion splice on

connector
Dispositifs d'interconnexion et composants passifs à fibres optiques –

Dimensions de la férule équipée et de l'interface de l'épissureur par fusion

relatives à une épissure par fusion sur connecteur

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 33.180.20 ISBN 978-2-8322-3699-4

– 2 – IEC TS 62965:2016 © IEC 2016
CONTENTS
FOREWORD . 3
1 Scope . 5
2 Normative references . 5
3 Terms and definitions . 5
4 Description . 6
5 Interfaces . 6
5.1 General . 6
5.2 Dimensions of the ferrule assembly . 6
5.3 Fusion splicer interface . 7
Annex A (informative)  An example of a universal holder interface . 8
Bibliography . 10

Figure 1 – Ferrule assembly dimensions . 6
Figure 2 – Fusion splicer interface . 7
Figure A.1 – An example of a universal holder interface . 8

Table 1 – Dimensions for a 2,5 mm diameter cylindrical ferrule assembly . 6
Table 2 – Dimensions for a 1,25 mm diameter cylindrical ferrule assembly . 7
Table 3 – Dimensions for the fusion splicer interface . 7
Table A.1 – Dimensions for the universal holder example interface for a ferrule
assembly with a 2,5 mm diameter cylindrical ferrule . 9
Table A.2 – Dimensions for the universal holder example interface for a ferrule
assembly with a 1,25 mm diameter cylindrical ferrule . 9

INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
FIBRE OPTIC INTERCONNECTING DEVICES
AND PASSIVE COMPONENTS –
Ferrule assembly and fusion splicer interface
dimensions for a fusion splice on connector

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
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8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is
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patent rights. IEC shall not be held responsible for identifying any or all such patent rights.
The main task of IEC technical committees is to prepare International Standards. In
exceptional circumstances, a technical committee may propose the publication of a technical
specification when
• the required support cannot be obtained for the publication of an International Standard,
despite repeated efforts, or
• the subject is still under technical development or where, for any other reason, there is the
future but no immediate possibility of an agreement on an International Standard.
Technical specifications are subject to review within three years of publication to decide
whether they can be transformed into International Standards.
IEC TS 62965, which is a Technical Specification, has been prepared by subcommittee 86B:
Fibre optic interconnecting devices and passive components, of IEC technical committee 86:
Fibre optics.
– 4 – IEC TS 62965:2016 © IEC 2016
The text of this Technical Specification is based on the following documents:
Enquiry draft Report on voting
86B/3971/DTS 86B/3986/RVC
Full information on the voting for the approval of this technical specification can be found in
the report on voting indicated in the above table.
This document has been drafted in accordance with the ISO/IEC Directives, Part 2.
The committee has decided that the contents of this publication will remain unchanged until
the stability date indicated on the IEC website under "http://webstore.iec.ch" in the data
related to the specific publication. At this date, the publication will be
• transformed into an International standard,
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.
FIBRE OPTIC INTERCONNECTING DEVICES
AND PASSIVE COMPONENTS –
Ferrule assembly and fusion splicer interface
dimensions for a fusion splice on connector

1 Scope
IEC TS 62965, which is a Technical Specification, specifies a minimum set of dimensional
requirements for fusion splice on connectors (FSOCs) ferrule assemblies and the interface
dimensions of splicing tools to ensure that a compliant ferrule assembly is compatible with a
compliant fusion splicer. This fusion splicer interface also provides an example of the
dimensional requirements for a universal holder, into which an FSOC can be mounted. This
fusion splicer interface applies to FSOCs with a cylindrical ferrule of 2,5 mm diameter or
1,25 mm diameter.
2 Normative references
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.
There are no normative references in this document.
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
ISO and IEC maintain terminological databases for use in standardization at the following
addresses:
• IEC Electropedia: available at http://www.electropedia.org/
• ISO Online browsing platform: available at http://www.iso.org/obp
3.1
ferrule assembly
component of an FSOC, which consists of a factory polished cylindrical ferrule, a flange and a
pre-installed fibre fixed to the ferrule
3.2
fusion splice on connector
FSOC
optical connector which can be installed in the field by fusion splicing the pre-installed fibre of
the ferrule assembly onto the fibre to be terminated
3.3
pre-installed fibre
portion of optical fibre where one end is fixed to the ferrule and factory polished with the
endface of the ferrule, and the another end extends out of the flange and has a cleaved
endface
– 6 – IEC TS 62965:2016 © IEC 2016
4 Description
This fusion splicer interface defines the minimum dimensional limits and relative locations of
an FSOC ferrule assembly within a fusion splicer to ensure that the fusion splicer is able to
complete the splicing process.
This document also provides information on an example universal holder to accommodate the
FSOC ferrule assembly. Other FSOC components such as connector housings, dust caps or
reinforcing sleeve do not affect the compatibility, so their dimensions are not addressed in this
fusion splicer interface.
It should be noted that this fusion splicer interface ensures only the compatibility between the
FSOC ferrule assembly and fusion splicing tools, and does not ensure the compatibility of
FSOC components of different models.
5 Interfaces
5.1 General
This document defines a minimum set of dimensional requirements for the ferrule assembly
and the fusion splicer. The dimensions of the ferrule assembly are given in Figure 1 and
Table 1 (for the 2,5 mm diameter type) and Table 2 (for the 1,25 mm diameter type). The
interface of the fusion splicer is given in Figure 2 and Table 3.
5.2 Dimensions of the ferrule assembly
C B
f f
A
f
Fibre
Ferrule
Buffer
E
f
Flange
IEC
Figure 1 – Ferrule assembly dimensions
Table 1 – Dimensions for a 2,5 mm diameter cylindrical ferrule assembly
Dimensions in millimetres
Reference Dimensions Remarks
Minimum Maximum
a
A 4,7 11,75 Length of the bare fibre portion
f
a
B 9,65 16,2
f
C – 11,5 The boundary between B and C is at the rear
f f f
end of the largest flange
D – 5,6 The overall dimension of the flange
f
E
– 3,35
f
a
A shall be less than B .
f f
D
f
Table 2 – Dimensions for a 1,25 mm diameter cylindrical ferrule assembly
Dimensions in millimetres
Reference Dimensions Remarks
Minimum Maximum
a
A 4,7 11,75 Length of the bare fibre portion
f
a
B 8,3 15,2
f
C – 7,65 The boundary between B and C is at the rear
f f f
end of the largest flange
D – 5,25 The overall dimension of the flange
f
E – 2,55
f
a
A shall be less than B
f f
5.3 Fusion splicer interface
Fibre alignment block
A-A
Top view
A
D
s
A
s
A
Area to be reserved
for ferrule assembly holders
Electrode Fibre centre Holder stage

IEC
Figure 2 – Fusion splicer interface
Table 3 – Dimensions for the fusion splicer interface
Dimensions in millimetres
Reference Dimensions Remarks
Minimum Maximum
A 3,5 4,6
s
D 3,5 – Applicable vertical position of the fibre from
s
the top surface of the area for holders
The area to be reserved for ferrule assembly holders shall be ≥ 11,5 mm in length and ≥ 5,6 mm in width and
≥ 2,8 mm in depth (except for the structure for aligning and/or fixing the holder) to accommodate all ferrule
assemblies compliant with this document.

– 8 – IEC TS 62965:2016 © IEC 2016
Annex A
(informative)
An example of a universal holder interface
Typically, each FSOC model has its original holder interface, i.e. a combination of a dedicated
ferrule assembly holder design and one of its applicable fusion splicer models, so that the
installation is optimised. This annex is provided as a guideline for users who plan to
design/use a universal holder for various FSOC ferrule assemblies. It should be noted that the
use of a universal holder may adversely affect the installation of the FSOC ferrule assembly in
comparison to using the original purpose-designed ferrule holder, but not the performance of
the assembled FSOC.
In conjunction with Figure A.1, examples of two universal holder interfaces are given in
Table A.1 (for a 2,5 mm diameter ferrule type) and in Table A.2 (for a 1,25 mm ferrule type).
These two examples are provided as sets of dimensional limits for a combination of the
2,5 mm or 1,25 mm ferrule assembly holders and the fusion splicer. Universal holders
complying with these interfaces can accommodate any of the ferrule assemblies with their
corresponding ferrule diameters as specified in this document.
In Figure A.1, dimension B varies during the fusion splicing process as the holder stage of
h
the fusion splicer moves. In this fusion splicer interface, the B basic dimension is defined as
h
the distance at the time of fusion splicing. Any value greater than B basic is allowed for B
h h
before the holder stage moves, as long as B can become equal to B basic at some point
h h
within the range of the holder stage movement.
The minimum limits for C and E have some margin against corresponding maximum limits
h h
for the ferrule assembly, C and E , respectively, shown in Figure 1. These margins allow
f f
positional adjustment of the ferrule assembly in its holder to achieve fibre end placement
between the electrodes and the fibre alignment block prior to fusion splicing.
This fusion splicer inter face does not define the means to fix the ferrule assembly holder onto
the fusion splicer holder stage.
Reference plane
Fibre alignment block
C B
h h
E
h
Area to be reserved
for ferrule assembly
Electrode
Ferrule assembly holder
Holder stage
IEC
Figure A.1 – An example of a universal holder interface
D
h
Table A.1 – Dimensions for the universal holder example interface
for a ferrule assembly with a 2,5 mm diameter cylindrical ferrule
Dimensions in millimetres
Reference Dimensions Remarks
Minimum Basic Maximum
a
B  At the time of fusion splicing
b
h
C 18,1 50
h
D 5,6 10
h
E 9,9 50
h
a
The fusion splicer shall allow sufficien
...