SIST EN 60793-2-10:2018
(Main)Optical fibres - Part 2-10: Product specifications - Sectional specification for category A1 multimode fibres (IEC 60793-2-10:2017)
Optical fibres - Part 2-10: Product specifications - Sectional specification for category A1 multimode fibres (IEC 60793-2-10:2017)
This part of IEC 60793 is applicable to optical fibre sub-categories A1a, A1b, and A1d. These
fibres are used or can be incorporated in information transmission equipment and optical fibre
cables.
Sub-category A1a applies to 50/125 μm graded index fibre. Four bandwidth grades are
defined as models A1a.1, A1a.2, A1a.3 and A1a.4. Each of these bandwidth grades is defined
for two levels of macrobend loss performance that are distinguished by "a" or "b" suffix. Those
models with suffix "a" are specified to meet traditional macrobend loss performance levels.
Those models with suffix "b" are specified to meet enhanced macrobend loss (i.e. lower loss)
performance levels. Model A1a.4 supports single wavelength or multi-wavelength
transmission systems in the vicinity of 850 nm to 950 nm.
Sub-category A1b applies to 62,5/125 μm graded index fibre and sub-category A1d applies to
100/140 μm graded index fibre.
Other applications include, but are not restricted to, the following: short reach, high bit-rate
systems in telephony, distribution and local networks carrying data, voice and/or video
services; on-premises intra-building and inter-building fibre installations including data
centres, local area networks (LANs), storage area networks (SANs), private branch
exchanges (PBXs), video, various multiplexing uses, outside telephone cable plant use, and
miscellaneous related uses.
Three types of requirements apply to these fibres:
• general requirements, as defined in IEC 60793-2;
• specific requirements common to the category A1 multimode fibres covered in this
document and which are given in Clause 5;
• particular requirements applicable to individual fibre sub-categories and models, or
specific applications, which are defined in the normative specification annexes.
Lichtwellenleiter - Teil 2-10: Produktspezifikationen - Rahmenspezifikation für Mehrmodenfasern der Kategorie A1 (IEC 60793-2-10:2017)
Fibres optiques - Partie 2-10: Spécifications de produits - Spécification intermédiaire pour les fibres multimodales de catégorie A1 (IEC 60793-2-10:2017)
IEC 60793-2-10:2017 est applicable aux fibres optiques des sous-catégories A1a, A1b et A1d. Ces fibres sont utilisées ou peuvent être intégrées dans des équipements destinés à la transmission de l’information et dans des câbles à fibres optiques. La sous-catégorie A1a s’applique aux fibres à gradient d’indice de 50/125 mm. Il existe quatre classes de largeur de bande, appelées modèles A1a.1, A1a.2, A1a.3 et A1a.4. Chacune de ces classes de largeur de bande est définie pour deux niveaux de performances en matière de pertes par macrocourbures, qui se distinguent par le suffixe "a" ou "b". Les modèles qui comportent le suffixe "a" sont spécifiés de façon à satisfaire aux niveaux de performances classiques en matière de pertes par macrocourbures. Les modèles qui comportent le suffixe "b" sont spécifiés de façon à satisfaire aux niveaux de performances avancées en matière de pertes par macrocourbures (c’est-à-dire des niveaux de pertes plus faibles). Le modèle A1a.4 supporte des systèmes de transmission à une seule ou plusieurs longueurs d'onde au voisinage de 850 nm à 950 nm. La sous-catégorie A1b s’applique aux fibres à gradient d’indice de 62,5/125 mm et la sous-catégorie A1d à celles de gradient d’indice de 100/140 mm. D’autres applications comprennent, mais sans s’y limiter, ce qui suit:
- les systèmes téléphoniques de courtes distances à haut débit, les réseaux de distribution et les réseaux locaux qui transportent des données, la voix et/ou des services vidéo;
- et les connexions par fibres intra ou inter bâtiment dans les locaux utilisateurs, englobant les centres de traitement de données, les réseaux locaux (LAN), les réseaux dédiés sauvegarde (SAN), les centraux téléphoniques privés (PABX), la vidéo, les différentes utilisations de multiplexage, l’utilisation d’une installation de câble du réseau téléphonique externe et les différentes utilisations associées. Trois types d’exigences s’appliquent à ces fibres:
- les exigences générales, qui sont définies dans l’IEC 60793-2;
- des exigences spécifiques communes aux fibres multimodales de catégorie A1, couvertes par le présent document et qui sont données à l’Article 5;
- des exigences particulières applicables à des sous-catégories et des modèles particuliers de fibres ou à des applications spécifiques, qui sont définies dans les annexes de spécifications normatives.
Cette sixième édition annule et remplace la cinquième 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: ajout du modèle A1a.4 de fibre qui supporte des systèmes de transmission à une seule ou plusieurs longueurs d'onde au voisinage de 850 nm à 950 nm.
Mots clés: fibres optiques des sous-catégories A1a, A1b et A1d
Optična vlakna - 2-10. del: Specifikacije izdelka - Področna specifikacija za mnogorodovna vlakna kategorije A1 (IEC 60793-2-10:2017)
Ta del standarda IEC 60793 se uporablja za podkategorije optičnih vlaken A1a, A1b in A1d. Ta vlakna se uporabljajo ali jih je mogoče vgraditi v opremo za prenos informacij in optične kable.
Podkategorija A1a se uporablja za vlakno z zveznim lomnim likom 50/125 μm. Kot modeli so opredeljene štiri stopnje pasovne širine: A1a.1, A1a.2, A1a.3 in A1a.4. Vsaka od teh stopenj je določena za dve ravni odpornosti na makropregibe, ki ju ločujemo s priponama »a« ali »b«. Modeli s pripono »a« ustrezajo ravnem običajne odpornosti na makropregibe. Modeli s pripono »b« ustrezajo ravnem izboljšane odpornosti na makropregibe (tj. večja odpornost). Model A1a.4 podpira sisteme za prenos prek ene valovne dolžine ali sisteme za prenos prek več valovnih dolžin na razdalji od 850 nm do 950 nm.
Podkategorija A1b se uporablja za vlakno z zveznim lomnim likom 62,5/125 μm in podkategorija A1d se uporablja za vlakno z zveznim lomnim likom 100/140 μm.
Drugi načini uporabe med drugim vključujejo: povezave kratkega dosega, sisteme z visoko bitno hitrostjo na področju telefonije, distribucijska in lokalna omrežja, prenos podatkov, glasovne in/ali video storitve; napeljave vlaken za povezave znotraj enega objekta in med več objekti na mestu uporabe, vključno s podatkovnimi centri, lokalna omrežja (LAN), pomnilniška omrežja (SAN), zasebna telefonska omrežja (PBX), video storitve, različne uporabe multipleksiranja, uporabo zunanje telefonske kabelske opreme ter razne povezane načine uporabe.
Za ta vlakna veljajo tri vrste zahtev:
• splošne zahteve, kot so opredeljene v standardu IEC 60793-2;
• posebne zahteve, ki so skupne večrodnim vlaknom kategorije A1 iz tega dokumenta in so navedene v točki 5;
• posebne zahteve, ki veljajo za posamezne podkategorije in modele vlaken ali posebne načine uporabe in so opredeljene v normativnih dodatkih o specifikaciji.
General Information
Relations
Standards Content (Sample)
SLOVENSKI STANDARD
SIST EN 60793-2-10:2018
01-januar-2018
Nadomešča:
SIST EN 60793-2-10:2016
Optična vlakna - 2-10. del: Specifikacije izdelka - Področna specifikacija za
mnogorodovna vlakna kategorije A1 (IEC 60793-2-10:2017)
Optical fibres - Part 2-10: Product specifications - Sectional specification for category A1
multimode fibres (IEC 60793-2-10:2017)
Lichtwellenleiter - Teil 2-10: Produktspezifikationen - Rahmenspezifikation für
Mehrmodenfasern der Kategorie A1 (IEC 60793-2-10:2017)
Fibres optiques - Partie 2-10: Spécifications de produits - Spécification intermédiaire
pour les fibres multimodales de catégorie A1 (IEC 60793-2-10:2017)
Ta slovenski standard je istoveten z: EN 60793-2-10:2017
ICS:
33.180.10 (Optična) vlakna in kabli Fibres and cables
SIST EN 60793-2-10:2018 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
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SIST EN 60793-2-10:2018
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SIST EN 60793-2-10:2018
EUROPEAN STANDARD EN 60793-2-10
NORME EUROPÉENNE
EUROPÄISCHE NORM
November 2017
ICS 33.180.10 Supersedes EN 60793-2-10:2016
English Version
Optical fibres - Part 2-10: Product specifications - Sectional
specification for category A1 multimode fibres
(IEC 60793-2-10:2017)
Fibres optiques - Partie 2-10: Spécifications de produits - Lichtwellenleiter - Teil 2-10: Produktspezifikationen -
Spécification intermédiaire pour les fibres multimodales de Rahmenspezifikation für Mehrmodenfasern der Kategorie
catégorie A1 A1
(IEC 60793-2-10:2017) (IEC 60793-2-10:2017)
This European Standard was approved by CENELEC on 2017-09-14. 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 CEN-CENELEC
Management Centre 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 CEN-CENELEC Management Centre 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, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia,
Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden,
Switzerland, Turkey and the United Kingdom.
European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels
© 2017 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
Ref. No. EN 60793-2-10:2017 E
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SIST EN 60793-2-10:2018
EN 60793-2-10:2017
European foreword
The text of document 86A/1771/CDV, future edition 6 of IEC 60793-2-10, prepared by SC 86A "Fibres
and cables" of IEC/TC 86 "Fibre optics" was submitted to the IEC-CENELEC parallel vote and
approved by CENELEC as EN 60793-2-10:2017.
The following dates are fixed:
(dop) 2018-06-14
• latest date by which the document has to be implemented at
national level by publication of an identical national
standard or by endorsement
• latest date by which the national standards conflicting with (dow) 2020-09-14
the document have to be withdrawn
This document supersedes EN 60793-2-10:2016.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CENELEC shall not be held responsible for identifying any or all such patent rights.
Endorsement notice
The text of the International Standard IEC 60793-2-10:2017 was approved by CENELEC as a
European Standard without any modification.
In the official version, for Bibliography, the following notes have to be added for the standards
indicated
IEC 61280-1-4 NOTE Harmonized as EN 61280-1-4.
IEC 61280-1-3 NOTE Harmonized as EN 61280-1-3.
IEC 60794-1-1 NOTE Harmonized as EN 60794-1-1.
2
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SIST EN 60793-2-10:2018
EN 60793-2-10:2017
Annex ZA
(normative)
Normative references to international publications
with their corresponding European publications
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.
NOTE 1 When an International Publication has been modified by common modifications, indicated by (mod), the relevant
EN/HD applies.
NOTE 2 Up-to-date information on the latest versions of the European Standards listed in this annex is available here:
www.cenelec.eu.
Publication Year Title EN/HD Year
IEC 60793-1-20 - Optical fibres - Part 1-20: Measurement EN 60793-1-20 -
methods and test procedures - Fibre
geometry
IEC 60793-1-21 - Optical fibres -- Part 1-21: Measurement EN 60793-1-21 -
methods and test procedures - Coating
geometry
IEC 60793-1-22 - Optical fibres -- Part 1-22: Measurement EN 60793-1-22 -
methods and test procedures - Length
measurement
IEC 60793-1-30 - Optical fibres -- Part 1-30: Measurement EN 60793-1-30 -
methods and test procedures - Fibre proof
test
IEC 60793-1-31 - Optical fibres -- Part 1-31: Measurement EN 60793-1-31 -
methods and test procedures - Tensile
strength
IEC 60793-1-32 - Optical fibres -- Part 1-32: Measurement EN 60793-1-32 -
methods and test procedures - Coating
strippability
IEC 60793-1-33 - Optical fibres - Part 1-33: Measurement FprEN 60793-1-33 -
methods and test procedures - Stress
corrosion susceptibility
IEC 60793-1-34 - Optical fibres -- Part 1-34: Measurement EN 60793-1-34 -
methods and test procedures - Fibre curl
IEC 60793-1-40 - Optical fibres -- Part 1-40: Measurement EN 60793-1-40 -
methods and test procedures - Attenuation
IEC 60793-1-41 - Optical fibres -- Part 1-41: Measurement EN 60793-1-41 -
methods and test procedures - Bandwidth
IEC 60793-1-42 - Optical fibres -- Part 1-42: Measurement EN 60793-1-42 -
methods and test procedures - Chromatic
dispersion
IEC 60793-1-43 - Optical fibres - Part 1-43: Measurement EN 60793-1-43 -
methods and test procedures - Numerical
aperture measurement
IEC 60793-1-46 - Optical fibres -- Part 1-46: Measurement EN 60793-1-46 -
methods and test procedures - Monitoring
of changes in optical transmittance
3
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SIST EN 60793-2-10:2018
EN 60793-2-10:2017
IEC 60793-1-47 - Optical fibres -- Part 1-47: Measurement EN 60793-1-47 -
methods and test procedures -
Macrobending loss
IEC 60793-1-49 - Optical fibres -- Part 1-49: Measurement EN 60793-1-49 -
methods and test procedures - Differential
mode delay
IEC 60793-1-50 - Optical fibres - Part 1-50: Measurement EN 60793-1-50 -
methods and test procedures - Damp heat
(steady state) tests
IEC 60793-1-51 - Optical fibres - Part 1-51: Measurement EN 60793-1-51 -
methods and test procedures - Dry heat
(steady state) tests
IEC 60793-1-52 - Optical fibres - Part 1-52: Measurement EN 60793-1-52 -
methods and test procedures - Change of
temperature tests
IEC 60793-1-53 - Optical fibres - Part 1-53: Measurement EN 60793-1-53 -
methods and test procedures - Water
immersion tests
IEC 60793-2 2015 Optical fibres - Part 2: Product EN 60793-2 2016
specifications - General
IEC 61280-4-1 2009 Fibre optic communication subsystem test EN 61280-4-1 2009
procedures -- Part 4-1: Installed cable plant
- Multimode attenuation measurement
4
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SIST EN 60793-2-10:2018
IEC 60793-2-10
®
Edition 6.0 2017-08
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Optical fibres –
Part 2-10: Product specifications – Sectional specification for category
A1 multimode fibres
Fibres optiques –
Partie 2-10: Spécifications de produits – Spécification intermédiaire pour les
fibres multimodales de catégorie A1
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
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ELECTROTECHNIQUE
INTERNATIONALE
ICS 33.180.10 ISBN 978-2-8322-4627-6
Warning! Make sure that you obtained this publication from an authorized distributor.
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SIST EN 60793-2-10:2018
– 2 – IEC 60793-2-10:2017 © IEC 2017
CONTENTS
FOREWORD . 5
1 Scope . 7
2 Normative references . 7
3 Terms, definitions . 8
4 Abbreviated terms . 8
5 Specifications . 9
5.1 General . 9
5.2 Dimensional requirements . 9
5.3 Mechanical requirements . 10
5.4 Transmission requirements . 11
5.5 Environmental requirements . 13
5.5.1 General . 13
5.5.2 Mechanical environmental requirements (common to all fibres in
category A1) . 14
5.5.3 Transmission environmental requirements . 14
Annex A (normative) Specifications for sub-category A1a multimode fibres . 16
A.1 General . 16
A.2 Dimensional requirements . 16
A.3 Mechanical requirements . 17
A.4 Transmission requirements . 17
A.5 Environmental requirements . 18
Annex B (normative) Specifications for sub-category A1b multimode fibres . 19
B.1 General . 19
B.2 Dimensional requirements . 19
B.3 Mechanical requirements . 19
B.4 Transmission requirements . 19
B.5 Environmental requirements . 20
Annex C (normative) Specifications for sub-category A1d multimode fibres . 21
C.1 General . 21
C.2 Dimensional requirements . 21
C.3 Mechanical requirements . 21
C.4 Transmission requirements . 21
C.5 Environmental requirements . 22
Annex D (normative) Fibre differential mode delay (DMD), calculated effective modal
bandwidth (EMB ) and calculated overfilled modal bandwidth (OMB )
c c
requirements . 23
D.1 A1a.2 fibre DMD requirements . 23
D.1.1 General . 23
D.1.2 DMD templates . 23
D.1.3 DMD interval masks . 24
D.2 A1a.2 fibre EMB requirements . 25
c
D.2.1 General . 25
D.2.2 Calculated effective bandwidth . 25
D.3 A1a.3 DMD requirements . 27
D.3.1 General . 27
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IEC 60793-2-10:2017 © IEC 2017 – 3 –
D.3.2 DMD templates . 27
D.3.3 DMD interval masks . 28
D.4 A1a.3 fibre EMB requirements . 28
c
D.4.1 General . 28
D.4.2 Calculated effective bandwidth . 28
D.5 A1a.4 fibre modal bandwidth requirements. 28
D.5.1 General . 28
D.5.2 Calculated effective modal bandwidth . 28
D.5.3 Calculated overfilled modal bandwidth . 29
Annex E (informative) System, modal bandwidth, and transmitter considerations . 30
E.1 Background . 30
E.2 System considerations . 30
E.2.1 A1a.2 and A1a.3 fibres . 30
E.2.2 A1a.4 fibre . 30
E.3 Effective modal bandwidth (EMB). 31
E.4 Transmitter encircled flux (EF) and centre wavelength requirements . 32
E.4.1 Encircled flux . 32
E.4.2 Centre wavelength for A1a.2 and A1a.3 fibres . 33
E.4.3 Centre wavelength for A1a.4 fibre . 33
Annex F (informative) Bandwidth nomenclature explanation. 34
Annex G (informative) Preliminary indications for items needing further study . 35
G.1 Effective modal bandwidth (EMB) at 1 300 nm . 35
G.2 Scaling of EMB with DMD . 35
Annex H (informative) Applications and cabling categories supported by A1 fibres . 37
H.1 Standardised applications . 37
H.2 Cross reference of cabled optical fibre performance categories in
ISO/IEC 11801-1 to fibres of this document . 37
Annex I (informative) 1-Gigabit, 10-Gigabit, 25-Gigabit, 40-Gigabit and 100-Gigabit
Ethernet applications . 39
Bibliography . 44
Figure 1 – Relation between bandwidths at 850 nm and 1 300 nm . 13
Figure D.1 – DMD template requirements . 24
Figure E.1 – Estimated minimum wide band EMB versus wavelength . 32
Figure E.2 – Approximate position of DMD weightings relative to the EF boundaries of
Equations (E.6) and (E.7) . 33
Table 1 – Dimensional attributes and measurement methods . 9
Table 2 – Dimensional requirements common to category A1 fibres . 10
Table 3 – Additional dimensional attributes required in sub-category specifications . 10
Table 4 – Mechanical attributes and measurement methods . 10
Table 5 – Mechanical requirements common to category A1 fibres . 11
Table 6 – Transmission attributes and measurement methods . 11
Table 7 – Additional transmission attributes required in sub-category specifications . 12
Table 8 – Environmental exposure tests . 13
Table 9 – Attributes measured for environmental tests . 13
Table 10 – Strip force for environmental tests . 14
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SIST EN 60793-2-10:2018
– 4 – IEC 60793-2-10:2017 © IEC 2017
Table 11 – Tensile strength for environmental tests . 14
Table 12 – Stress corrosion susceptibility for environmental tests . 14
Table 13 – Change in attenuation for environmental tests . 15
Table A.1 – Dimensional requirements specific to A1a fibres . 16
Table A.2 – Mechanical requirements specific to A1a fibres . 17
Table A.3 – Transmission requirements specific to A1a fibres . 18
Table B.1 – Dimensional requirements specific to A1b fibres . 19
Table B.2 – Mechanical requirements specific to A1b fibres . 19
Table B.3 – Transmission requirements specific to A1b fibres . 20
Table C.1 – Dimensional requirements specific to A1d fibres . 21
Table C.2 – Mechanical requirements specific to A1d fibres . 21
Table C.3 – Transmission requirements specific to A1d fibres . 22
Table D.1 – DMD templates for A1a.2 fibres . 23
Table D.2 – DMD interval masks for A1a.2 fibres . 25
Table D.3 – DMD weightings . 26
Table D.4 – DMD templates for A1a.3 fibres . 28
Table D.5 – DMD interval masks for A1a.3 fibres . 28
Table D.6 – DMD weighting for OMB . 29
c
Table F.1 – Bandwidth nomenclature explanation . 34
Table H.1 – Some standardised applications supported by A1a fibres and in some
cases A1b fibres . 37
Table H.2 – Cross reference between ISO/IEC 11801-1 and this document . 38
Table I.1 – Summary of 1 Gb/s, 10 Gb/s, 25 Gb/s, 40 Gb/s and 100 Gb/s Ethernet
requirements and capabilities . 40
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SIST EN 60793-2-10:2018
IEC 60793-2-10:2017 © IEC 2017 – 5 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
OPTICAL FIBRES –
Part 2-10: Product specifications –
Sectional specification for category A1 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
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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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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 60793-2-10 has been prepared by subcommittee 86A: Fibres and
cables, of IEC technical committee 86: Fibre optics.
This sixth edition cancels and replaces the fifth 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) addition of model A1a.4 fibre which supports single wavelength or multi-wavelength
transmission systems in the vicinity of 850 nm to 950 nm.
The text of this standard is based on the following documents:
CDV Report on voting
86A/1771/CDV 86A/1794/RVC
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SIST EN 60793-2-10:2018
– 6 – IEC 60793-2-10:2017 © IEC 2017
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.
IMPORTANT – The 'colour inside' logo on the cover page of this publication 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.
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SIST EN 60793-2-10:2018
IEC 60793-2-10:2017 © IEC 2017 – 7 –
OPTICAL FIBRES –
Part 2-10: Product specifications –
Sectional specification for category A1 multimode fibres
1 Scope
This part of IEC 60793 is applicable to optical fibre sub-categories A1a, A1b, and A1d. These
fibres are used or can be incorporated in information transmission equipment and optical fibre
cables.
Sub-category A1a applies to 50/125 µm graded index fibre. Four bandwidth grades are
defined as models A1a.1, A1a.2, A1a.3 and A1a.4. Each of these bandwidth grades is defined
for two levels of macrobend loss performance that are distinguished by "a" or "b" suffix. Those
models with suffix "a" are specified to meet traditional macrobend loss performance levels.
Those models with suffix "b" are specified to meet enhanced macrobend loss (i.e. lower loss)
performance levels. Model A1a.4 supports single wavelength or multi-wavelength
transmission systems in the vicinity of 850 nm to 950 nm.
Sub-category A1b applies to 62,5/125 µm graded index fibre and sub-category A1d applies to
100/140 µm graded index fibre.
Other applications include, but are not restricted to, the following: short reach, high bit-rate
systems in telephony, distribution and local networks carrying data, voice and/or video
services; on-premises intra-building and inter-building fibre installations including data
centres, local area networks (LANs), storage area networks (SANs), private branch
exchanges (PBXs), video, various multiplexing uses, outside telephone cable plant use, and
miscellaneous related uses.
Three types of requirements apply to these fibres:
• general requirements, as defined in IEC 60793-2;
• specific requirements common to the category A1 multimode fibres covered in this
document and which are given in Clause 5;
• particular requirements applicable to individual fibre
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