Optical fibres - Part 2-40: Product specifications - Sectional specification for category A4 multimode fibres

IEC 60793-2-40:2021 is available as IEC 60793-2-40:2021 RLV which contains the International Standard and its Redline version, showing all changes of the technical content compared to the previous edition.IEC 60793-2-40:2021 is applicable to category A4 optical multimode fibres and the related subcategories A4a, A4b, A4c, A4d, A4e, A4g, A4h and A4i. These fibres have a plastic core and plastic cladding and may have step-index, multi-step index or graded-index profiles. The fibres are used in information transmission equipment and other applications employing similar light transmitting techniques, and in fibre optic cables. Table 1 summarizes some of the salient characteristics and applications of these fibres. This fifth edition cancels and replaces the fourth edition published in 2015. This edition constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition:
- revision of NA range of A4a.2;
- addition of a new subcategory A4i;
- deletion of the subcategory A4f and of Annex F.

Fibres optiques - Partie 2-40: Spécifications de produits - Spécification intermédiaire pour les fibres multimodales de catégorie A4

IEC 60793-2-40:2021 est disponible sous forme de IEC 60793-2-40:2021 RLV qui contient la Norme internationale et sa version Redline, illustrant les modifications du contenu technique depuis l'édition précédente.L'IEC 60793-2-40:2021 s'applique à la catégorie de fibres optiques multimodales A4 et à ses sous-catégories A4a, A4b, A4c, A4d, A4e, A4g, A4h et A4i. Ces fibres possèdent un cœur et une gaine en plastique et elles peuvent avoir des profils de type en saut d'indice, en sauts multiples d'indice ou en gradient d'indice. Les fibres sont utilisées dans les équipements destinés à la transmission de l'information et dans d'autres applications utilisant des techniques similaires de transmission du rayonnement lumineux, et dans des câbles fibroniques. Le Tableau 1 résume certaines des caractéristiques et applications principales de ces fibres. Cette cinquième édition annule et remplace la quatrième édition parue en 2015 dont elle constitue une révision technique. La présente édition inclut les modifications techniques majeures suivantes par rapport à l'édition précédente:
- révision de la plage d'ouvertures numériques des fibres A4a.2;
- ajout d'une nouvelle sous-catégorie A4i;
- suppression de la sous-catégorie A4f et de l'Annexe F.

General Information

Status
Published
Publication Date
24-Feb-2021
Technical Committee
Current Stage
PPUB - Publication issued
Completion Date
25-Feb-2021
Ref Project

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IEC 60793-2-40
Edition 5.0 2021-02
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Optical fibres –
Part 2-40: Product specifications – Sectional specification for category A4
multimode fibres
Fibres optiques –
Partie 2-40: Spécifications de produits – Spécification intermédiaire pour les
fibres multimodales de catégorie A4
IEC 60793-2-40:2021-02(en-fr)
---------------------- Page: 1 ----------------------
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---------------------- Page: 2 ----------------------
IEC 60793-2-40
Edition 5.0 2021-02
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Optical fibres –
Part 2-40: Product specifications – Sectional specification for category A4
multimode fibres
Fibres optiques –
Partie 2-40: Spécifications de produits – Spécification intermédiaire pour les
fibres multimodales de catégorie A4
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 33.180.10 ISBN 978-2-8322-9437-6

Warning! Make sure that you obtained this publication from an authorized distributor.

Attention! Veuillez vous assurer que vous avez obtenu cette publication via un distributeur agréé.

® Registered trademark of the International Electrotechnical Commission
Marque déposée de la Commission Electrotechnique Internationale
---------------------- Page: 3 ----------------------
– 2 – IEC 60793-2-40:2021 © IEC 2021
CONTENTS

FOREWORD ........................................................................................................................... 5

1 Scope .............................................................................................................................. 7

2 Normative references ...................................................................................................... 8

3 Terms and definitions ...................................................................................................... 8

4 Specifications .................................................................................................................. 9

4.1 Dimensional requirements ....................................................................................... 9

4.2 Mechanical requirements ...................................................................................... 10

4.2.1 General ......................................................................................................... 10

4.2.2 Tensile load test ............................................................................................ 10

4.3 Transmission requirements ................................................................................... 11

4.4 Environmental requirements ................................................................................. 12

4.4.1 General ......................................................................................................... 12

4.4.2 Mechanical environmental requirements ........................................................ 13

4.4.3 Transmission environmental requirements ..................................................... 13

Annex A (normative) Family specifications for subcategory A4a multimode fibres ................ 15

A.1 General ................................................................................................................. 15

A.2 Dimensional requirements ..................................................................................... 15

A.3 Mechanical requirements ...................................................................................... 15

A.4 Transmission requirements ................................................................................... 15

A.5 Environmental requirements ................................................................................. 16

Annex B (normative) Family specifications for subcategory A4b multimode fibres ................ 17

B.1 General ................................................................................................................. 17

B.2 Dimensional requirements ..................................................................................... 17

B.3 Mechanical requirements ...................................................................................... 17

B.4 Transmission requirements ................................................................................... 17

B.5 Environmental requirements ................................................................................. 18

Annex C (normative) Family specifications for subcategory A4c multimode fibres ................ 19

C.1 General ................................................................................................................. 19

C.2 Dimensional requirements ..................................................................................... 19

C.3 Mechanical requirements ...................................................................................... 19

C.4 Transmission requirements ................................................................................... 19

C.5 Environmental requirements ................................................................................. 20

Annex D (normative) Family specifications for subcategory A4d multimode fibres ................ 21

D.1 General ................................................................................................................. 21

D.2 Dimensional requirements ..................................................................................... 21

D.3 Mechanical requirements ...................................................................................... 21

D.4 Transmission requirements ................................................................................... 21

D.5 Environmental requirements ................................................................................. 22

Annex E (normative) Family specifications for subcategory A4e multimode fibres ................ 23

E.1 General ................................................................................................................. 23

E.2 Dimensional requirements ..................................................................................... 23

E.3 Mechanical requirements ...................................................................................... 23

E.4 Transmission requirements ................................................................................... 23

E.5 Environmental requirements ................................................................................. 24

Annex F (normative) Family specifications for subcategory A4f multimode fibres ................. 25

---------------------- Page: 4 ----------------------
IEC 60793-2-40:2021 © IEC 2021 – 3 –

Annex G (normative) Family specifications for subcategory A4g multimode fibres ................ 26

G.1 General ................................................................................................................. 26

G.2 Dimensional requirements ..................................................................................... 26

G.3 Mechanical requirements ...................................................................................... 26

G.4 Transmission requirements ................................................................................... 26

G.5 Environmental requirements ................................................................................. 27

Annex H (normative) Family specifications for subcategory A4h multimode fibres ................ 28

H.1 General ................................................................................................................. 28

H.2 Dimensional requirements ..................................................................................... 28

H.3 Mechanical requirements ...................................................................................... 28

H.4 Transmission requirements ................................................................................... 28

H.5 Environmental requirements ................................................................................. 29

Annex I (normative) Family specifications for subcategory A4i multimode fibres .................. 30

I.1 General ................................................................................................................. 30

I.2 Dimensional requirements ..................................................................................... 30

I.3 Mechanical requirements ...................................................................................... 30

I.4 Transmission requirements ................................................................................... 30

I.5 Environmental requirements ................................................................................. 31

Annex J (normative) Mode scramblers for subcategory A4a to A4c fibres ............................. 32

J.1 General ................................................................................................................. 32

J.2 Specification for mode scramblers ........................................................................ 32

Annex K (informative) Additional transmission requirements for subcategory A4a

multimode fibres for wavelengths below 650 nm ................................................................... 33

K.1 General ................................................................................................................. 33

K.2 Transmission requirements ................................................................................... 33

Bibliography .......................................................................................................................... 34

Figure 1 – Tensile load versus elongation for a plastic optical fibre ....................................... 11

Figure J.1 – Mode scrambler for category A4 fibre ................................................................ 32

Table 1 – Characteristics and applications of category A4 fibres ............................................. 7

Table 2 – Dimensional attributes and measurement methods .................................................. 9

Table 3 – Requirements common to all category A4 fibres ...................................................... 9

Table 4 – Additional attributes required in A4g through A4i family specifications ..................... 9

Table 5 – Mechanical attributes and test methods ................................................................. 10

Table 6 – Requirements common to category A4 fibres ......................................................... 10

Table 7 – Additional attributes required in family specification for sub-category A4g

through A4i fibres ................................................................................................................. 10

Table 8 – Transmission attributes and measurement methods .............................................. 12

Table 9 – Attributes required in family specifications ............................................................. 12

Table 10 – Environmental exposure tests .............................................................................. 13

Table 11 – Attributes measured ............................................................................................ 13

Table 12 – Requirement for tensile strength .......................................................................... 13

Table 13 – Requirement for change in attenuation for A4a through A4e fibre ........................ 14

Table 14 – Requirement for change in attenuation for A4g through A4i fibre ......................... 14

Table A.1 – Dimensional requirements specific to A4a fibres ................................................ 15

---------------------- Page: 5 ----------------------
– 4 – IEC 60793-2-40:2021 © IEC 2021

Table A.2 – Mechanical requirements specific to A4a fibres .................................................. 15

Table A.3 – Transmission requirements specific to A4a fibres ............................................... 16

Table B.1 – Dimensional requirements specific to A4b fibres ................................................ 17

Table B.2 – Mechanical requirements specific to A4b fibres .................................................. 17

Table B.3 – Transmission requirements specific to A4b fibres ............................................... 18

Table C.1 – Dimensional requirements specific to A4c fibres ................................................ 19

Table C.2 – Mechanical requirements specific to A4c fibres .................................................. 19

Table C.3 – Transmission requirements specific to A4c fibres ............................................... 20

Table D.1 – Dimensional requirements specific to A4d fibres ................................................ 21

Table D.2 – Mechanical requirements specific to A4d fibres .................................................. 21

Table D.3 – Transmission requirements specific to A4d fibres............................................... 22

Table E.1 – Dimensional requirements specific to A4e fibres ................................................ 23

Table E.2 – Mechanical requirements specific to A4e fibres .................................................. 23

Table E.3 – Transmission requirements specific to A4e fibres ............................................... 24

Table G.1 – Dimensional requirements specific to A4g fibres ................................................ 26

Table G.2 – Mechanical requirements specific to A4g fibres ................................................. 26

Table G.3 – Transmission requirements specific to A4g fibres .............................................. 27

Table H.1 – Dimensional requirements specific to A4h fibres ................................................ 28

Table H.2 – Mechanical requirements specific to A4h fibres .................................................. 28

Table H.3 – Transmission requirements specific to A4h fibres............................................... 29

Table I.1 – Dimensional requirements specific to A4i fibres ................................................... 30

Table I.2 – Mechanical requirements specific to A4i fibres .................................................... 30

Table I.3 – Transmission requirements specific to A4i fibres ................................................. 31

Table J.1 – Mode Scrambler parameters ............................................................................... 32

Table K.1 – Transmission requirements specific to A4a.2 fibre.............................................. 33

---------------------- Page: 6 ----------------------
IEC 60793-2-40:2021 © IEC 2021 – 5 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
OPTICAL FIBRES –
Part 2-40: Product specifications –
Sectional specification for category A4 multimode 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-governmental organizations liaising

with the IEC also participate in this preparation. IEC collaborates closely 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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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.

International Standard IEC 60793-2-40 has been prepared by subcommittee 86A: Fibres and

cables, of IEC technical committee 86: Fibre optics.

This fifth edition cancels and replaces the fourth edition published in 2015. This edition

constitutes a technical revision.

This edition includes the following significant technical changes with respect to the previous

edition:
a) revision of NA range of A4a.2;
b) addition of a new subcategory A4i;
c) deletion of the subcategory A4f and of Annex F.
---------------------- Page: 7 ----------------------
– 6 – IEC 60793-2-40:2021 © IEC 2021
The text of this International Standard is based on the following documents:
CDV Report on voting
86A/1943/CDV 86A/1981/RVC

Full information on the voting for the approval of this International Standard 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.

A list of all parts in the IEC 60793 series, published under the general title Optical fibres, can

be found on the IEC website.

The committee has decided that the contents of this document will remain unchanged until the

stability date indicated on the IEC website under "http://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.
---------------------- Page: 8 ----------------------
IEC 60793-2-40:2021 © IEC 2021 – 7 –
OPTICAL FIBRES –
Part 2-40: Product specifications –
Sectional specification for category A4 multimode fibres
1 Scope

This part of IEC 60793 is applicable to category A4 optical multimode fibres and the related

subcategories A4a, A4b, A4c, A4d, A4e, A4g, A4h and A4i. These fibres have a plastic core

and plastic cladding and may have step-index, multi-step index or graded-index profiles. The

fibres are used in information transmission equipment and other applications employing similar

light transmitting techniques, and in fibre optic cables. Table 1 summarizes some of the salient

characteristics and applications of these fibres.
Table 1 – Characteristics and applications of category A4 fibres
Sub-category A4a A4b A4c A4d A4e A4f A4g A4h A4i
A4a.1 A4a.2
Core diameter
a a a a c
≥ 500 120 62,5 55
(µm)
Cladding
1 000 750 500 1 000 750 490
490 245
diameter (µm)
Numerical
aperture Na
ff c
0,50 0,53 0,50 0,50 0,30 0,25 0,190 0,190 0,24
Operating 650
850
wave-length(s) 650 650 650 650 850 850
650
1 300
(nm) 1 300

Applications Digital audio Industrial Sensor Digital Digital Data Data Industrial

interface, automobile, and audio- audio- trans- trans- data
industrial, sensor and sensor visual visual mission mission; trans-
data transmission interface interface primarily mission
and data and data used in
trans- trans- ribbon
mission mission structures
Typically 15 µm to 35 µm smaller than the cladding diameter.
Other potential wavelengths for A4a fibre are described in Annex K.
This sub-category is outdated and therefore no more specified.
Cladding diameters of 490 µm and 750 µm are also possible.
Na is numerical aperture measured by far field pattern method.

In addition to the applications shown in Table 1, other applications for A4 fibres include, but are

not restricted to, the following: support for short reach, high bit-rate systems in telephony,

distribution and local networks, carrying data, voice and/or video services and on-premises

intrabuilding and interbuilding fibre installations, including local area networks (LANs), private

branch exchanges (PBXs), video, various multiplexing uses and miscellaneous related uses,

such as consumer electronics and industrial and mobile networks.
Three types of requirements apply to A4 fibres:
• general requirements, as defined in IEC 60793-2;

• specific requirements common to category A4 multimode fibres covered in this document

and which are given in Clause 4;
---------------------- Page: 9 ----------------------
– 8 – IEC 60793-2-40:2021 © IEC 2021

• particular requirements applicable to individual fibre sub-categories and implementations or

specific applications which are defined in this document, in the normative family

specification annexes.
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.
IEC 60068-1, Environmental testing – Part 1: General and guidance

IEC 60793-1-20, Optical fibres – Part 1-20: Measurement methods and test procedures – Fibre

geometry

IEC 60793-1-22, Optical fibres – Part 1-22: Measurement methods and test procedures –

Length measurement
IEC 60793-1-40:2019, Optical fibres – Part 1-40: Attenuation measurement methods

IEC 60793-1-41, Optical fibres – Part 1-41: Measurement methods and test procedures –

Bandwidth

IEC 60793-1-42, Optical fibres – Part 1-42: Measurement methods and test procedures –

Chromatic dispersion

IEC 60793-1-43, Optical fibres – Part 1-43: Measurement methods and test procedures –

Numerical aperture measurement

IEC 60793-1-46, Optical fibres – Part 1-46: Measurement methods and test procedures –

Monitoring of changes in optical transmittance

IEC 60793-1-47, Optical fibres – Part 1-47: Measurement methods and test procedures –

Macrobending loss

IEC 60793-1-50, Optical fibres – Part 1-50: Measurement methods and test procedures – Damp

heat (steady state) tests

IEC 60793-1-51, Optical fibres – Part 1-51: Measurement methods and test procedures – Dry

heat (steady state) tests

IEC 60793-1-52, Optical fibres – Part 1-52: Measurement methods and test procedures –

Change of temperature tests
3 Terms and definitions
No terms and definitions are listed in this document.

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
---------------------- Page: 10 ----------------------
IEC 60793-2-40:2021 © IEC 2021 – 9 –
4 Specifications
4.1 Dimensional requirements
Relevant dimensional attributes and measurement methods are given in Table 2.
Requirements common to all category A4 fibres are indicated in Table 3.

Additional attributes that shall be specified in the family specifications for subcategories A4g

through A4i are given in Table 4.
Table 2 – Dimensional attributes and measurement methods
Attribute Measurement method
Cladding d
...

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