IEC 60793-2-50:2018

Optical fibres - Part 2-50: Product specifications - Sectional specification for class B single-mode fibres

IEC 60793-2-50: 2018 is applicable to optical fibre categories B-652, B-653, B-654, B-655, B 656 and B-657. A map illustrating the connection of IEC designations to ITU-T designations is shown in Table 1. These fibres are used or can be incorporated in information transmission equipment and optical fibre cables. Three types of requirements apply to these fibres:
• general requirements, as defined in IEC 60793-2;
• specific requirements common to the class B single-mode fibres covered in this document and which are given in Clause 5;
• particular requirements applicable to individual fibre categories or specific applications, which are defined in Annexes A to F.
For some fibre categories (shown in the relevant family specifications), there are sub-categories that are distinguished on the basis of difference in transmission attribute specifications. The designations for these sub-categories are documented in the individual family specifications.
The 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) Introduction of a revised naming convention which better matches with those found in ITU T Recommendations G.652, G.653, G.654, G.655, G.656, and G.657. These changes are outlined in the scope of this document along with a cross reference table for the new names. Annexes have been rearranged to improve clarity based on the new naming;
b) Further details on the requirements for 200 micron coated single-mode fibre;
c) Harmonization with the following ITU-T Recommendations published in November 2016: G.652, G.654, G.657 including revised chromatic dispersion specifications, new categories and new application spaces for these fibre categories;
d) Descriptions of fibre types have been added to the titles of Annexes A to F.
Keywords: information transmission equipment, optical fibre cables

Fibres optiques - Partie 2-50: Spécifications de produits - Spécification intermédiaire pour les fibres unimodales de classe B

L'IEC 60793-2-50: 2018 est applicable aux fibres optiques des catégories B-652, B 653, B-654, B-655, B 656 et B-657. Une table de correspondance entre les désignations IEC et les désignations UIT-T est représentée dans le Tableau 1. 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. 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 unimodales de classe B, couvertes par le présent document, et qui sont données dans l’Article 5;
• des exigences particulières applicables à des catégories particulières de fibres ou à des applications données, qui sont définies dans les Annexes A à F.
Pour certaines catégories de fibres (indiquées dans les spécifications de famille correspondantes), il existe des sous-catégories qui se distinguent les unes des autres par leurs différences de spécifications d’attributs de transmission. Les désignations pour ces sous-catégories sont documentées dans les spécifications de famille individuelles. Cette sixième édition annule et remplace la cinquième édition parue en 2015. Cette édition constitue une révision technique. Cette édition inclut les modifications techniques majeures suivantes par rapport à l’édition précédente:
a) introduction d’une convention de nommage révisée correspondant mieux à celles figurant dans les Recommandations de l’UIT-T G.652, G.653, G.654, G.655, G.656 et G.657. Ces modifications sont décrites dans le domaine d’application du présent document et accompagnées d’une table de correspondance pour les nouveaux noms. Les annexes ont été réarrangées à partir du nouveau nommage à des fins de lisibilité;
b) plus de détails sur les exigences pour une fibre unimodale à revêtement de 200 microns;
c) harmonisation avec les Recommandations de l’IUT-T G.652, G.654, G.657, consenties en septembre 2016 et comprenant des spécifications révisées de dispersion chromatique, des nouvelles catégories de fibre et les nouveaux lieux d’application correspondants;
d) des descriptions des types de fibre ont été ajoutées aux titres des Annexes A à F.
Mots-clés : équipements destinés à la transmission de l’information, câbles à fibres optiques

General Information

• Status: Published
• Publication Date: 13-Dec-2018
• ICS: 01 - GENERALITIES. TERMINOLOGY. STANDARDIZATION. DOCUMENTATION
• ICS: 33.180.10 - Fibres and cables
• Technical Committee: SC 86A - Fibres and cables
• Drafting Committee: WG 1 - TC 86/SC 86A/WG 1
• Current Stage: PPUB - Publication issued
• Start Date: 14-Dec-2018
• Completion Date: 14-Dec-2018

Relations

• Revises: IEC 60793-2-50:2015 - Optical fibres - Part 2-50: Product specifications - Sectional specification for class B single-mode fibres
• Effective Date: 05-Sep-2023

Standards Content (Sample)

IEC 60793-2-50 ®
Edition 6.0 2018-12
REDLINE VERSION
INTERNATIONAL
STANDARD
colour
inside
Optical fibres –
Part 2-50: Product specifications – Sectional specification for class B single-
mode fibres
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form
or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from
either IEC or IEC's member National Committee in the country of the requester. If you have any questions about IEC
copyright or have an enquiry about obtaining additional rights to this publication, please contact the address below or
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About the IEC
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IEC 60793-2-50 ®
Edition 6.0 2018-12
REDLINE VERSION
INTERNATIONAL
STANDARD
colour
inside
Optical fibres –
Part 2-50: Product specifications – Sectional specification for class B single-

mode fibres
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 33.180.10 ISBN 978-2-8322-6361-7

– 2 – IEC 60793-2-50:2018 RLV © IEC 2018
CONTENTS
FOREWORD . 5
1 Scope . 7
2 Normative references . 8
3 Terms and definitions . 10
4 Abbreviated terms and symbols . 10
5 Specifications . 10
5.1 General . 10
5.2 Dimensional requirements . 10
5.3 Mechanical requirements . 11
5.4 Transmission requirements . 12
5.5 Environmental requirements . 14
5.5.1 General . 14
5.5.2 Optical environmental requirements – Attenuation . 14
5.5.3 Mechanical environmental requirements . 15
Annex A (normative) Family specification for category B1.1 B-652
Dispersion unshifted single-mode fibres . 16
A.1 General . 16
A.2 Dimensional requirements . 16
A.3 Mechanical requirements . 17
A.4 Transmission requirements . 17
A.5 Hydrogen ageing for sub-category B-652.D . 19
A.6 Environmental requirements . 19
Annex (normative) Family specification for category B1.3 single-mode fibres .
Annex B (normative) Family specification for category B.2 B-653 Dispersion shifted
single-mode fibres . 23
B.1 General . 23
B.2 Dimensional requirements . 23
B.3 Transmission requirements . 24
B.3.1 General . 24
B.3.2 Chromatic dispersion coefficient requirement for sub-category B2_a B-
653.A fibres . 24
B.3.3 Chromatic dispersion coefficient requirement for sub-category B2_b B-
653.B fibres . 25
B.4 Environmental requirements . 25
Annex C (normative) Family specification for category B1.2 B-654 cut-off shifted
single-mode fibres . 26
C.1 General . 26
C.2 Dimensional requirements . 26
C.3 Mechanical requirements . 26
C.4 Chromatic dispersion parameters for B-654.E fibres . 28
C.5 Environmental requirements . 28
Annex D (normative) Family specification for category B.4 B-655 non-zero dispersion
shifted single-mode fibres . 29
D.1 General . 29
D.2 Dimensional requirements . 29
D.3 Mechanical requirements . 29

D.4 Transmission requirements . 30
D.4.1 General . 30
D.4.2 Chromatic dispersion coefficient limits for sub-category B4_c B-655.C
fibres . 30
D.4.3 Chromatic dispersion coefficient limits for sub-category B4_d B-655.D
fibres . 31
D.4.4 Chromatic dispersion coefficient limits for sub-category B4_e B-655.E
fibres . 31
D.5 Environmental requirements . 31
Annex E (normative) Family specification for category B5 B-656 Wideband
non-zero dispersion shifted single-mode fibres . 32
E.1 General . 32
E.2 Dimensional requirements . 32
E.3 Mechanical requirements . 32
E.4 Transmission requirements . 33
E.4.1 General . 33
E.4.2 Chromatic dispersion coefficient for category B5 B-656 fibres . 33
E.5 Environmental requirements . 34
Annex F (normative) Family specification for category B6 B-657 Bending
loss insensitive single-mode fibres . 35
F.1 General . 35
F.2 Dimensional requirements . 35
F.3 Mechanical requirements . 36
F.4 Transmission requirements . 36
F.5 Environmental requirements . 39
Annex G (informative) System design information for category category B4 B-655
non-zero disperion shifted single-mode fibres . 40
G.1 General . 40
G.2 One standard deviation limits for sub-category B4_d B-655.D fibres . 40
G.3 One standard deviation limits for sub-category B4_e B-655.E fibres . 41
Annex (informative) Map from IEC nomenclature to ITU-T recommendations .
Bibliography . 44
Figure G.1 – Sub- category B4_d B-655.D chromatic dispersion coefficient limits . 41
Figure G.2 – Sub-category B4_e B-655.E chromatic dispersion coefficient limits . 42
Table 1 – Map of IEC designation to ITU-T Recommendations and IEC 60793-2-
50:2015 designation. 8
Table 2 – Dimensional attributes and measurement methods . 11
Table 3 – Dimensional requirements common to all category B fibres . 11
Table 4 – Mechanical attributes and test methods . 12
Table 5 – Mechanical requirements common to all class B fibres . 12
Table 6 – Transmission attributes and measurement methods . 13
Table 7 – Transmission, requirements common to all class B fibres . 13
Table 8 – Additional transmission attributes required in the family specifications . 13
Table 9 – Environmental exposure tests . 14
Table 10 – Attributes measured in environmental exposure tests . 14
Table 11 – Change in attenuation for environmental tests . 14

– 4 – IEC 60793-2-50:2018 RLV © IEC 2018
Table 12 – Coating strip force for environmental tests . 15
Table 13 – Tensile strength for environmental tests . 15
Table 14 – Stress corrosion susceptibility for environmental tests . 15
Table A.1 – Dimensional requirements specific to category B1.1 B-652.B fibres . 16
Table A.2 – Dimensional requirements specific to category B-652.D fibres . 17
Table A.3 – Mechanical requireme
...

IEC 60793-2-50 ®
Edition 6.0 2018-12
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Optical fibres –
Part 2-50: Product specifications – Sectional specification for class B single-
mode fibres
Fibres optiques –
Partie 2-50: Spécifications de produits – Spécification intermédiaire pour les
fibres unimodales de classe B
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form
or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from
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International Standards for all electrical, electronic and related technologies.

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latest edition, a corrigenda or an amendment might have been published.

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IEC 60793-2-50 ®
Edition 6.0 2018-12
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Optical fibres –
Part 2-50: Product specifications – Sectional specification for class B single-

mode fibres
Fibres optiques –
Partie 2-50: Spécifications de produits – Spécification intermédiaire pour les

fibres unimodales de classe B
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 33.180.10 ISBN 978-2-8322-6280-1

– 2 – IEC 60793-2-50:2018 © IEC 2018
CONTENTS
FOREWORD . 5
1 Scope . 7
2 Normative references . 8
3 Terms and definitions . 9
4 Abbreviated terms and symbols . 10
5 Specifications . 10
5.1 General . 10
5.2 Dimensional requirements . 10
5.3 Mechanical requirements . 11
5.4 Transmission requirements . 12
5.5 Environmental requirements . 13
5.5.1 General . 13
5.5.2 Optical environmental requirements – Attenuation . 14
5.5.3 Mechanical environmental requirements . 14
Annex A (normative) Family specification for category B-652 Dispersion unshifted
single-mode fibres . 16
A.1 General . 16
A.2 Dimensional requirements . 16
A.3 Mechanical requirements . 17
A.4 Transmission requirements . 17
A.5 Hydrogen ageing for sub-category B-652.D . 19
A.6 Environmental requirements . 19
Annex B (normative) Family specification for category B-653 Dispersion shifted
single-mode fibres . 20
B.1 General . 20
B.2 Dimensional requirements . 20
B.3 Transmission requirements . 21
B.3.1 General . 21
B.3.2 Chromatic dispersion coefficient requirement for sub-category B-653.A
fibres . 21
B.3.3 Chromatic dispersion coefficient requirement for sub-category B-653.B
fibres . 22
B.4 Environmental requirements . 22
Annex C (normative) Family specification for category B-654 cut-off shifted single-
mode fibres . 23
C.1 General . 23
C.2 Dimensional requirements . 23
C.3 Mechanical requirements . 23
C.4 Chromatic dispersion parameters for B-654.E fibres . 25
C.5 Environmental requirements . 25
Annex D (normative) Family specification for category B-655 non-zero dispersion
shifted single-mode fibres . 26
D.1 General . 26
D.2 Dimensional requirements . 26
D.3 Mechanical requirements . 26
D.4 Transmission requirements . 27
D.4.1 General . 27

D.4.2 Chromatic dispersion coefficient limits for sub-category B-655.C fibres. 27
D.4.3 Chromatic dispersion coefficient limits for sub-category B-655.D fibres. 28
D.4.4 Chromatic dispersion coefficient limits for sub-category B-655.E fibres . 28
D.5 Environmental requirements . 28
Annex E (normative) Family specification for category B-656 Wideband non-zero

dispersion shifted single-mode fibres . 29
E.1 General . 29
E.2 Dimensional requirements . 29
E.3 Mechanical requirements . 29
E.4 Transmission requirements . 30
E.4.1 General . 30
E.4.2 Chromatic dispersion coefficient for category B-656 fibres . 30
E.5 Environmental requirements . 31
Annex F (normative) Family specification for category B-657 Bending loss insensitive
single-mode fibres . 32
F.1 General . 32
F.2 Dimensional requirements . 32
F.3 Mechanical requirements . 33
F.4 Transmission requirements . 33
F.5 Environmental requirements . 35
Annex G (informative) System design information for category B-655 non-zero
disperion shifted single-mode fibres . 36
G.1
...