SIST EN 60793-2-40:2011

Optical fibres - Part 2-40: Product specifications - Sectional specification for category A4 multimode fibres (IEC 60793-2-40:2009)

This part of IEC 60793-2 is applicable to optical fibre categories A4a, A4b, A4c, A4d, A4e, A4f, A4g and A4h. These fibres have a plastic core and plastic cladding and may have stepindex, multi-step index, or graded-index profiles. The fibres are used in information transmission equipment and optical fibre cables. Table 1 summarizes some of the salient characteristics and applications of these fibres.
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 LANs, 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 standard
and that are given in Clause 3;
particular requirements applicable to individual fibre types or specific applications and that
are defined in this standard in the normative family specification annexes

Lichtwellenleiter - Teil 2-40: Produktspezifikationen - Rahmenspezifikation für Mehrmodenfasern der Kategorie A4 (IEC 60793-2-40:2009)

Fibres optiques - Partie 2-40: Spécifications de produits - Spécification intermédiaire pour les fibres multimodales de la catégorie A4 (CEI 60793-2-40:2009)

La CEI 60793-2-40:2009 s'applique aux catégories de fibres optiques A4a, A4b, A4c, A4d, A4e, A4f, A4g et A4h. Ces fibres possèdent un coeur et une gaine en plastique et elles peuvent avoir des profils de type saut d'indice, sauts multiples d'indice ou gradient d'indice. Cette troisième édition annule et remplace la deuxième édition publiée en 2006 et constitue une révision technique qui définit une fibre A4a améliorée désignée A4a.2 alors que la désignation de la fibre A4a existante a été renommée en A4a.1.

Optična vlakna - 2-40. del: Specifikacije izdelka - Področna specifikacija za večrodna vlakna kategorije A4 (IEC 60793-2-40:2009)

Ta del IEC 60793-2 velja za optična vlakna kategorij A4a, A4b, A4c, A4d, A4e, A4f, A4g in A4h. Ta optična vlakna imajo plastično sredico, plastični plašč in imajo lahko profile s stopničastim lomnim količnikom, večstopničastim lomnim količnikom in stopnjevalnim lomnim količnikom. Vlakna se uporabljajo pri opremi za prenos informacij in optičnih kablih. Preglednica 1 povzema nekatere pomembne značilnosti in uporabe teh vlaken.
Poleg načinov uporab, navedenih v preglednici 1, drugi načini uporabe vlaken A4 vključujejo, a niso omejeni na naslednje: podpora sistemom z visoko bitno hitrostjo kratkega dosega v telefoniji, distribuciji in lokalnih omrežjih, prenos podatkov, glasovne in/ali videostoritve in napeljave na mestu uporabe v stavbi in med stavbami, vključno z LAN, PBX, videom in različnimi multipleksnimi uporabami, ter razne povezane uporabe, kot so potrošniška elektronika in industrijska ter mobilna omrežja.
Za vlakna A4 veljajo tri vrste zahtev:
splošne zahteve, kot jih opredeljuje IEC 60793-2,
posebne zahteve, skupne za večrodovna vlakna kategorije A4, ki jih zajema ta standard
in so navedene v klavzuli 3,
posamezne zahteve, ki veljajo za posamezne vrste vlaken ali posebne uporabe in
jih ta standard opredeljuje v normativnih dodatkih za skupinsko specifikacijo.

General Information

• Status: Withdrawn
• Publication Date: 03-Mar-2011
• Withdrawal Date: 17-Feb-2019
• ICS: 33.180.10 - Fibres and cables
• Technical Committee: MOC - Mobile Communications
• Current Stage: 9900 - Withdrawal (Adopted Project)
• Start Date: 15-Feb-2019
• Due Date: 10-Mar-2019
• Completion Date: 18-Feb-2019
• Ref Project: EN 60793-2-40:2011 - Optical fibres - Part 2-40: Product specifications - Sectional specification for category A4 multimode fibres

Relations

• Revised: SIST EN 60793-2-40:2016 - Optical fibres - Part 40: Product specifications - Sectional specification for category A4 multimode fibres (IEC 60793-2-40:2015)
• Effective Date: 06-May-2014
• Replaced By: SIST EN 60793-2-40:2016 - Optical fibres - Part 40: Product specifications - Sectional specification for category A4 multimode fibres (IEC 60793-2-40:2015)
• Effective Date: 28-Jan-2023
• Replaces: SIST EN 60793-2-40:2006 - Optical fibres -- Part 2-40: Product specifications - Sectional specification for category A4 multimode fibres
• Effective Date: 01-Apr-2011
• Replaces: SIST EN 60793-2-40:2006 - Optical fibres -- Part 2-40: Product specifications - Sectional specification for category A4 multimode fibres
• Effective Date: 29-Jan-2023
• Replaces: SIST EN 60793-2-40:2006 - Optical fibres -- Part 2-40: Product specifications - Sectional specification for category A4 multimode fibres
• Effective Date: 07-Jun-2022

Standards Content (Sample)

SLOVENSKI STANDARD
SIST EN 60793-2-40:2011
01-april-2011
1DGRPHãþD
SIST EN 60793-2-40:2006
2SWLþQDYODNQDGHO6SHFLILNDFLMHL]GHOND3RGURþQDVSHFLILNDFLMD]D
YHþURGQDYODNQDNDWHJRULMH$,(&
Optical fibres - Part 2-40: Product specifications - Sectional specification for category A4
multimode fibres (IEC 60793-2-40:2009)
Lichtwellenleiter - Teil 2-40: Produktspezifikationen - Rahmenspezifikation für
Mehrmodenfasern der Kategorie A4 (IEC 60793-2-40:2009)
Fibres optiques - Partie 2-40: Spécifications de produits - Spécification intermédiaire
pour les fibres multimodales de la catégorie A4 (CEI 60793-2-40:2009)
Ta slovenski standard je istoveten z: EN 60793-2-40:2011
ICS:
33.180.10 2SWLþQDYODNQDLQNDEOL Fibres and cables
SIST EN 60793-2-40:2011 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST EN 60793-2-40:2011

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SIST EN 60793-2-40:2011

EUROPEAN STANDARD
EN 60793-2-40

NORME EUROPÉENNE
February 2011
EUROPÄISCHE NORM

ICS 33.180.10 Supersedes EN 60793-2-40:2006


English version


Optical fibres -
Part 2-40: Product specifications -
Sectional specification for category A4 multimode fibres
(IEC 60793-2-40:2009)


Fibres optiques -  Lichtwellenleiter -
Partie 2-40: Spécifications de produits – Teil 2-40: Produktspezifikationen -
Spécification intermédiaire pour les fibres Rahmenspezifikation für
multimodales de la catégorie A4 Mehrmodenfasern der Kategorie A4
(CEI 60793-2-40:2009) (IEC 60793-2-40:2009)




This European Standard was approved by CENELEC on 2011-01-02. CENELEC members are bound to comply
with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard
the status of a national standard without any alteration.

Up-to-date lists and bibliographical references concerning such national standards may be obtained on
application to the Central Secretariat or to any CENELEC member.

This European Standard exists in three official versions (English, French, German). A version in any other
language made by translation under the responsibility of a CENELEC member into its own language and notified
to the Central Secretariat has the same status as the official versions.

CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Croatia, Cyprus,
the Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy,
Latvia, Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia,
Spain, Sweden, Switzerland and the United Kingdom.

CENELEC
European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung

Management Centre: Avenue Marnix 17, B - 1000 Brussels


© 2011 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.
Ref. No. EN 60793-2-40:2011 E

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SIST EN 60793-2-40:2011
EN 60793-2-40:2011 - 2 -
Foreword
The text of document 86A/1237/CDV, future edition 3 of IEC 60793-2-40, prepared by SC 86A, Fibres
and cables, of IEC TC 86, Fibre optics, was submitted to the IEC-CENELEC parallel vote and was
approved by CENELEC as EN 60793-2-40 on 2011-01-02.
This European Standard supersedes EN 60793-2-40:2006.
This EN 60793-2-40:2011 defines an enhanced A4a fibre named A4a.2 while the existing A4a fibre has
been renamed A4a.1.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CEN and CENELEC shall not be held responsible for identifying any or all such patent
rights.
The following dates were fixed:
– latest date by which the EN has to be implemented
at national level by publication of an identical
national standard or by endorsement (dop) 2011-10-02
– latest date by which the national standards conflicting
with the EN have to be withdrawn (dow) 2014-01-02
Annex ZA has been added by CENELEC.
__________
Endorsement notice
The text of the International Standard IEC 60793-2-40:2009 was approved by CENELEC as a European
Standard without any modification.
In the official version, for Bibliography, the following note has to be added for the standard indicated:
IEC 60793-1-21:2001 NOTE  Harmonized as EN 60793-1-21:2002 (not modified).
__________

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SIST EN 60793-2-40:2011
- 3 - EN 60793-2-40:2011
Annex ZA
(normative)

Normative references to international publications
with their corresponding European publications

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.

NOTE  When an international publication has been modified by common modifications, indicated by (mod), the relevant EN/HD
applies.

Publication Year Title EN/HD Year

IEC 60068-1 - Environmental testing - EN 60068-1 -
Part 1: General and guidance


IEC 60793-1 Series Optical fibres EN 60793-1 Series


IEC 60793-1-20 2001 Optical fibres - EN 60793-1-20 2002
Part 1-20: Measurement methods and test
procedures - Fibre geometry


IEC 60793-1-22 2001 Optical fibres - EN 60793-1-22 2002
Part 1-22: Measurement methods and test
procedures - Length measurement


IEC 60793-1-40 2001 Optical fibres - EN 60793-1-40 2003
(mod) Part 1-40: Measurement methods and test
procedures - Attenuation


1)
IEC 60793-1-41 2001 Optical fibres - EN 60793-1-41 2002
Part 1-41: Measurement methods and test
procedures - Bandwidth


IEC 60793-1-42 2007 Optical fibres - EN 60793-1-42 2007
Part 1-42: Measurement methods and test
procedures - Chromatic dispersion


IEC 60793-1-43 2001 Optical fibres - EN 60793-1-43 2002
Part 1-43: Measurement methods and test
procedures - Numerical aperture


IEC 60793-1-46 2001 Optical fibres - EN 60793-1-46 2002
Part 1-46: Measurement methods and test
procedures - Monitoring of changes in optical
transmittance


IEC 60793-1-47 2009 Optical fibres - EN 60793-1-47 2009
Part 1-47: Measurement methods and test
procedures - Macrobending loss


IEC 60793-1-50 2001 Optical fibres - EN 60793-1-50 2002
Part 1-50: Measurement methods and test
procedures - Damp heat (steady state)


IEC 60793-1-51 2001 Optical fibres - EN 60793-1-51 2002
Part 1-51: Measurement methods and test
procedures - Dry heat



1)
EN 60793-1-41 is superseded by EN 60793-1-41:2003, which is based on IEC 60793-1-41:2003.

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SIST EN 60793-2-40:2011
EN 60793-2-40:2011 - 4 -
Publication Year Title EN/HD Year

IEC 60793-1-52 2001 Optical fibres - EN 60793-1-52 2002
Part 1-52: Measurement methods and test
procedures - Change of temperature


IEC 60793-2 - Optical fibres - EN 60793-2 -
Part 2: Product specifications - General


IEC 60794-2-41 - Optical fibre cables - EN 60794-2-41 -
Part 2-41: Indoor cables - Product
specification for simplex and duplex buffered
A4 fibres

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SIST EN 60793-2-40:2011
IEC 60793-2-40
®
Edition 3.0 2009-04
INTERNATIONAL
STANDARD


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


INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
PRICE CODE
V
ICS 33.780.10 ISBN 978-2-88910-290-7
® Registered trademark of the International Electrotechnical Commission

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SIST EN 60793-2-40:2011
– 2 – 60793-2-40 © IEC:2009(E)
CONTENTS
FOREWORD.4
1 Scope and object.6
2 Normative references .7
3 Specifications .7
3.1 Dimensional requirements .7
3.2 Mechanical requirements.8
3.2.1 Tensile load test .9
3.3 Transmission requirements .10
3.4 Environmental requirements .11
3.4.1 Mechanical environmental requirement.12
3.4.2 Transmission environmental requirements .12
Annex A (normative) Family specifications for A4a multimode fibres .14
Annex B (normative) Family specifications for A4b multimode fibres .16
Annex C (normative) Family specifications for A4c multimode fibres .18
Annex D (normative) Family specifications for A4d multimode fibres.20
Annex E (normative) Family specifications for A4e multimode fibres .22
Annex F (normative) Family specifications for A4f multimode fibres .24
Annex G (normative) Family specifications for A4g multimode fibres.26
Annex H (normative) Family specifications for A4h multimode fibres.28
Annex I (normative) Mode Scramblers for A4a to A4d Fibres (based on IEC 794-1-1,
1999) .30
Annex J (informative) Additional transmission requirements for A4a multimode fibres
for wavelengths below 650 nm .31

Figure 1 – Tensile Load versus Elongation for a plastic optical fibre. .10
Figure I.1 – Mode Scrambler for A4 fibre .30

Table 1 – Characteristics and applications of category A4 Fibres.6
Table 2 – Dimensional attributes and measurement methods.8
Table 3 – Requirements common to all category A4 fibres .8
Table 4 – Additional attributes required in A4a though A4e family specifications.8
Table 5 – Additional attributes required in A4f through A4h family specifications.8
Table 6 – Mechanical attributes and test methods.9
Table 7 – Requirements common to category A4 fibres.9
Table 8 – Additional attributes required in family specification for categories A4a
through A4e fibres .9
Table 9 – Additional attributes required in family specification for categories A4f
through A4h fibres .9
Table 10 – Transmission attributes and measurement methods .11
Table 11 – Attributes required in family specifications.11
Table 12 – Environmental exposure tests.11
Table 13 – Attributes measured .12
Table 14 – Requirement for tensile strength.12

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SIST EN 60793-2-40:2011
60793-2-40 © IEC:2009(E) – 3 –
Table 15 – Requirement for change in attenuation for A4a through A4e fibre .12
Table 16 – Requirement for change in attenuation for A4f through A4h fibre .13
Table A.1 – Dimensional requirements specific to A4a fibres .14
Table A.2 – Mechanical requirements specific to A4a fibres.14
Table A.3 – Transmission requirements specific to A4a fibres.15
Table B.1 – Dimensional requirements specific to A4b fibres .16
Table B.2 – Mechanical requirements specific to A4b fibres.16
Table B.3 – Transmission requirements specific to A4b fibres.17
Table C.1 – Dimensional requirements specific to A4c fibres .18
Table C.2 – Mechanical requirements specific to A4c fibres.18
Table C.3 – Transmission requirements specific to A4c fibres.19
Table D.1 – Dimensional requirements specific to A4d fibres .20
Table D.2 – Mechanical requirements specific to A4d fibres.20
Table D.3 – Transmission requirements specific to A4d fibres .21
Table E.1 – Dimensional requirements specific to A4e fibres .22
Table E.2 – Mechanical requirements specific to A4e fibres.22
Table E.3 – Transmission requirements specific to A4e fibres.23
Table F.1 – Dimensional requirements specific to A4f fibres .24
Table F.2 – Mechanical requirements specific to A4f fibres .24
Table F.3 – Transmission requirements specific to A4f fibres.25
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 – Mode Scrambler parameters .30
Table J.1 – Transmission requirements specific to A4a.2 fibre .31

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SIST EN 60793-2-40:2011
– 4 – 60793-2-40 © IEC:2009(E)
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
interested IEC National Committees.
3) IEC Publications have the form of recommendations for international use and are accepted by IEC National
Committees in that sense. While all reasonable efforts are made to ensure that the technical content of IEC
Publications is accurate, IEC cannot be held responsible for the way in which they are used or for any
misinterpretation by any end user.
4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications
transparently to the maximum extent possible in their national and regional publications. Any divergence
between any IEC Publication and the corresponding national or regional publication shall be clearly indicated in
the latter.
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) 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 third edition cancels and replaces the second edition published in 2006 and constitutes a
technical revision which defines an enhanced A4a fibre named A4a.2 while the existing A4a
fibre has been renamed A4a.1.
The text of this standard is based on the following documents:
CDV Report on voting
86A/1237/CDV 86A/1264/RVC

Full information on the voting for the approval of this standard can be found in the report on
voting indicated in the above table.
This publication has been drafted in accordance with the ISO/IEC Directives, Part 2.

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SIST EN 60793-2-40:2011
60793-2-40 © IEC:2009(E) – 5 –
A list of all parts of 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 publication will remain unchanged until
the maintenance result date indicated on the IEC web site under "http://webstore.iec.ch" in
the data related to the specific publication. At this date, the publication will be
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.
A bilingual version of this publication may be issued at a later date.

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SIST EN 60793-2-40:2011
– 6 – 60793-2-40 © IEC:2009(E)
OPTICAL FIBRES –

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



1 Scope
This part of IEC 60793-2 is applicable to optical fibre categories A4a, A4b, A4c, A4d, A4e,
A4f, A4g and A4h. 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 optical fibre cables. Table 1 summarizes some of the salient
characteristics and applications of these fibres.
Table 1 – Characteristics and applications of category A4 Fibres
A4a A4b A4c A4d A4e A4f A4g A4h
Core diameter See Note 1 See See See Note 1 200 120 62,5
≥500
Note 1 Note 1
(μm)
Cladding 1000 750 500 1000 750 490 490 245
diameter (μm)
t t t t t e e e
Numerical 0,50 0,50 0,50 0,30 0,25 0,190 0,190 0,190
aperture
Operating 650 650 650 650 650 650, 850, 650, 850, 850, 1300
wavelength(s) 1300 1300
See Note 2
(nm)
Applications Digital audio industrial sensor Digital Digital Industrial Data Data
interface, and audiovisual audiovisual and mobile; transmission transmission;
automobile, sensor interface interface compatible primarily
industrial and data and data with A3 used in
and sensor transmission transmission transmission ribbon
equipment structures
Data
transmission
NOTE 1 Typically 15μm to 35 μm smaller than the cladding diameter.
NOTE 2 Other potential wavelengths for A4a fibre are described in Annex J.
t
Theoretical.
e
Measured effective.

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 LANs, 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 standard
and that are given in Clause 3;
• particular requirements applicable to individual fibre types or specific applications and that
are defined in this standard in the normative family specification annexes.

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SIST EN 60793-2-40:2011
60793-2-40 © IEC:2009(E) – 7 –
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 60068-1, Environmental testing – Part 1: General and guidance
IEC 60793-1 (all parts), Optical fibres – Part 1: Measurement methods and test procedures
IEC 60793-1-20:2001, Optical fibres – Part 1-20: Measurement methods and test procedures
– Fibre geometry
IEC 60793-1-22:2001, Optical fibres – Part 1-22: Measurement methods and test procedures
– Length measurement
IEC 60793-1-40:2001, Optical fibres – Part 1-40: Measurement methods and test procedures
– Attenuation
IEC 60793-1-41:2001, Optical fibres – Part 1-41: Measurement methods and test procedures
– Bandwidth
IEC 60793-1-42:2007, Optical fibres – Part 1-42: Measurement methods and test procedures
– Chromatic dispersion
IEC 60793-1-43:2001, Optical fibres – Part 1-43: Measurement methods and test procedures
– Numerical aperture
IEC 60793-1-46:2001, Optical fibres – Part 1-46: Measurement methods and test procedures
– Monitoring of changes in optical transmittance
IEC 60793-1-47: 2009, Optical fibres – Part 1-47: Measurement methods and test procedures
– Macrobending loss
IEC 60793-1-50:2001, Optical fibres – Part 1-50: Measurement methods and test procedures
– Damp heat (steady state)
IEC 60793-1-51:2001, Optical fibres – Part 1-51: Measurement methods and test procedures
– Dry heat
IEC 60793-1-52:2001, Optical fibres – Part 1-52: Measurement methods and test procedures
– Change of temperature
IEC 60793-2, Optical fibres − Part 2: Product specifications – General
IEC 60794-2-41, Optical fibre cables – Part 2-41: Product specification for simplex and duplex
buffered A4 fibres.
3 Specifications
3.1 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.

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SIST EN 60793-2-40:2011
– 8 – 60793-2-40 © IEC:2009(E)
Tables 4 and 5 list additional attributes that shall be specified by each family specification.
Table 2 – Dimensional attributes and measurement methods
Attributes Measurement methods
Cladding diameter IEC 60793-1-20
Cladding non-circularity IEC 60793-1-20
Core diameter IEC 60793-1-20
Fibre length IEC 60793-1-22
Core-cladding concentricity error IEC 60793-1-20
Core non-circularity IEC 60793-1-20

Table 3 – Requirements common to all category A4 fibres
Attributes Unit Limits

a
Cladding non-circularity %
≤6

b
Core diameter
μm
c
Fibre length km
a
Unless otherwise specified in the family specification.
b
For A4a, A4b, A4c and A4d fibre, the core diameter is typically 15 μm to 35 μm smaller than the
cladding diameter. For A4e, A4f, A4g and A4h fibre, the core diameter varies and is listed in the
family specification.
c
Length requirements vary and should be agreed between the supplier and the customer.

Table 4 – Additional attributes required in A4a though A4e family specifications
Attributes
Cladding diameter

Table 5 – Additional attributes required in A4f through A4h family specifications
Attributes
Cladding diameter
Core non-circularity
Core-cladding concentricity error

3.2 Mechanical requirements
Mechanical attributes, test methods, and requirements for buffered fibre can be found in
IEC 60794-2-41.
Relevant mechanical attributes and test methods are given in Table 6.
Requirements common to all category A4 fibres are indicated in Table 7.
Additional attributes that shall be specified in the family specifications for categories A4a
through A4e are given in Table 8.

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SIST EN 60793-2-40:2011
60793-2-40 © IEC:2009(E) – 9 –
Additional attributes that shall be specified in the family specifications for categories A4f
through A4h are given in Table 9.
Table 6 – Mechanical attributes and test methods
Attributes Test methods
Tensile performance 3.2.1

Table 7 – Requirements common to category A4 fibres
Attribute Unit Limit
Elongation at yield peak %
≥4,0

Table 8 – Additional attributes required in family specification
for categories A4a through A4e fibres
Attributes
Tensile load at yield peak

Table 9 – Additional attributes required in family specification
for categories A4f through A4h fibres
Attributes
Tensile load at yield peak
Tensile load to induce 4 % elongation
3.2.1 Tensile load test
3.2.1.1 Object
The purpose of this test is to characterize the ability of the fibre to support a load during
handling. Its purpose is to obtain values of the fibre’s tensile strength.
The fibre samples are subjected to a mechanical environment as specified below. The test
shall be carried out at the standard test conditions in compliance with IEC 60068-1.
3.2.1.2 Definition of yield peak
Figure 1 shows a typical load vs. elongation curve for a plastic optical fibre. The curve
exhibits an initial monotonic increase in tensile load with applied elongation that goes through
a load peak. The peak is followed by a decrease in load as the sample begins to undergo a
ductile, irreversible elongation. Localized necking and drawing of the sample may accompany
the process. This phenomenon is known as yielding and the peak is termed a yield peak.

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SIST EN 60793-2-40:2011
– 10 – 60793-2-40 © IEC:2009(E)


0
0 Strain  %
IEC  417/06

Figure 1 – Tensile load versus elongation for a plastic optical fibre
3.2.1.3 Test apparatus
The length of the sample between two clamping devices shall be between 100 mm and
200 mm.
The tensile strength measuring apparatus shall be a device, for example a vertical tensile
tester, that provides relative motion to the test fibre. The apparatus shall be capable of
imparting constant motion without jerking the fibre under test. The apparatus shall have the
ability to simultaneously measure and record the resulting tensile force or load. To prevent
fibre breakage, the means used to secure the fibre ends at the clamping points shall not
stress the fibre excessively.
3.2.1.4 Procedure
The tensile speed shall be 100 mm/min (±10 %). Yield strength and yield elongation are
obtained from the load-elongation curve described in 3.2.1.2. Unless otherwise specified,
tensile load a
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