EN 60793-2-50:2008

SLOVENSKI STANDARD
01-januar-2009
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SIST EN 60793-2-50:2004
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Optical fibres - Part 2-50: Product specifications - Sectional specification for class B
single-mode fibres (IEC 60793-2-50:2008)
Lichtwellenleiter - Teil 2-50: Produktspezifikationen - Rahmenspezifikation für
Einmodenfasern der Kategorie B (IEC 60793-2-50:2008)
Fibres optiques - Partie 2-50: Spécifications de produits - Spécification intermédiaire
pour les fibres unimodales de classe B (CEI 60793-2-50:2008)
Ta slovenski standard je istoveten z: EN 60793-2-50:2008
ICS:
33.180.10 2SWLþQDYODNQDLQNDEOL Fibres and cables
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD
EN 60793-2-50
NORME EUROPÉENNE
November 2008
EUROPÄISCHE NORM
ICS 33.180.10 Supersedes EN 60793-2-50:2004

English version
Optical fibres -
Part 2-50: Product specifications -
Sectional specification for class B single-mode fibres
(IEC 60793-2-50:2008)
Fibres optiques -  Lichtwellenleiter -
Partie 2-50: Spécifications de produits - Teil 2-50: Produktspezifikationen -
Spécification intermédiaire Rahmenspezifikation
pour les fibres unimodales de classe B für Einmodenfasern der Kategorie B
(CEI 60793-2-50:2008) (IEC 60793-2-50:2008)

This European Standard was approved by CENELEC on 2008-10-01. 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, 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

Central Secretariat: rue de Stassart 35, B - 1050 Brussels

© 2008 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.
Ref. No. EN 60793-2-50:2008 E
Foreword
The text of document 86A/1164/CDV, future edition 3 of IEC 60793-2-50, 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 60793-2-50 on 2008-10-01.
This European Standard supersedes EN 60793-2-50:2004 + corrigendum July 2004.
Compared to EN 60793-2-50:2004, this EN 60793-2-50:2008
– aligns the requirements with the relevant ITU-T Recommendations, including tightening the tolerances
of many parameters;
– provides a means for defining the requirements of sub-categories;
– now includes two sub-categories for B1.2 fibres;
– now includes three sub-categories for B4 fibres;
– replaces the traditional method of specifying chromatic dispersion coefficient by limiting curves vs.
wavelength for two of the sub-categories for B4 fibres;
– adds a new category, B5, which corresponds to the fibres defined in ITU-T Recommendation G.656;
– adds a new category, B6, which corresponds to the fibres defined in ITU-T Recommendation G.657;
– adds an informative annex that maps the nomenclature of the IEC fibre specifications to that of the
ITU-T fibre recommendations;
– adds a clause for definitions;
– adds a clause for abbreviations;
– removes the dates from the normative references.
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) 2009-07-01
– latest date by which the national standards conflicting
with the EN have to be withdrawn (dow) 2011-10-01
Annex ZA has been added by CENELEC.
__________
Endorsement notice
The text of the International Standard IEC 60793-2-50:2008 was approved by CENELEC as a European
Standard without any modification.
__________
- 3 - EN 60793-2-50:2008
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

1) 2)
IEC 60793-1-1 - Optical fibres - EN 60793-1-1 2008
Part 1-1: Measurement methods and test
procedures - General and guidance

1) 2)
IEC 60793-1-20 - Optical fibres - EN 60793-1-20 2002
Part 1-20: Measurement methods and test
procedures - Fibre geometry
1) 2)
IEC 60793-1-21 - Optical fibres - EN 60793-1-21 2002
Part 1-21: Measurement methods and test
procedures - Coating geometry
1) 2)
IEC 60793-1-22 - Optical fibres - EN 60793-1-22 2002
Part 1-22: Measurement methods and test
procedures - Length measurement

1) 2)
IEC 60793-1-30 - Optical fibres - EN 60793-1-30 2002
Part 1-30: Measurement methods and test
procedures - Fibre proof test
1) 2)
IEC 60793-1-31 - Optical fibres - EN 60793-1-31 2002
Part 1-31: Measurement methods and test
procedures - Tensile strength
1) 2)
IEC 60793-1-32 - Optical fibres - EN 60793-1-32 2003
(mod) Part 1-32: Measurement methods and test
procedures - Coating strippability

1) 2)
IEC 60793-1-33 - Optical fibres - EN 60793-1-33 2002
Part 1-33: Measurement methods and test
procedures - Stress corrosion susceptibility

1) 2)
IEC 60793-1-34 - Optical fibres - EN 60793-1-34 2006
Part 1-34: Measurement methods and test
procedures - Fibre curl
1) 2)
IEC 60793-1-40 - Optical fibres - EN 60793-1-40 2003
(mod) Part 1-40: Measurement methods and test
procedures - Attenuation
1) 2)
IEC 60793-1-42 - Optical fibres - EN 60793-1-42 2007
Part 1-42: Measurement methods and test
procedures - Chromatic dispersion

1) 2)
IEC 60793-1-44 - Optical fibres - EN 60793-1-44 2002
Part 1-44: Measurement methods and test
procedures - Cut-off wavelength

1)
Undated reference.
2)
Valid edition at date of issue.

Publication Year Title EN/HD Year

1) 2)
IEC 60793-1-45 - Optical fibres - EN 60793-1-45 2003
(mod) Part 1-45: Measurement methods and test + corr. April 2004
procedures - Mode field diameter

1) 2)
IEC 60793-1-46 - Optical fibres - EN 60793-1-46 2002
Part 1-46: Measurement methods and test
procedures - Monitoring of changes in optical
transmittance
1) 2)
IEC 60793-1-47 - Optical fibres - EN 60793-1-47 2007
Part 1-47: Measurement methods and test
procedures - Macrobending loss

1) 2)
IEC 60793-1-48 - Optical fibres - EN 60793-1-48 2007
Part 1-48: Measurement methods and test
procedures - Polarization mode dispersion

1) 2)
IEC 60793-1-50 - Optical fibres - EN 60793-1-50 2002
Part 1-50: Measurement methods and test
procedures - Damp heat (steady state)

1) 2)
IEC 60793-1-51 - Optical fibres - EN 60793-1-51 2002
Part 1-51: Measurement methods and test
procedures - Dry heat
1) 2)
IEC 60793-1-52 - Optical fibres - EN 60793-1-52 2002
Part 1-52: Measurement methods and test
procedures - Change of temperature

1) 2)
IEC 60793-1-53 - Optical fibres - EN 60793-1-53 2002
Part 1-53: Measurement methods and test
procedures - Water immersion
1) 2)
IEC 60793-2 - Optical fibres - EN 60793-2 2008
Part 2: Product specifications - General

1) 2)
IEC 60794-2 - Optical fibre cables - EN 60794-2 2003
Part 2: Indoor cables - Sectional specification

IEC 60793-2-50
Edition 3.0 2008-05
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
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
PRICE CODE
INTERNATIONALE
W
CODE PRIX
ICS 33.180.10 ISBN 2-8318-9824-2

– 2 – 60793-2-50 © IEC:2008
CONTENTS
FOREWORD.4
1 Scope.6
2 Normative references .6
3 Terms and definitions .7
4 Abbreviations and symbols .7
5 Specifications .8
5.1 General .8
5.2 Dimensional requirements .8
5.3 Mechanical requirements.9
5.4 Transmission requirements .10
5.5 Environmental requirements .11
5.5.1 Optical environmental requirements.12
5.5.2 Mechanical environmental requirements .12
Annex A (normative) Family specification for B1.1 single-mode fibres.14
Annex B (normative) Family specification for B1.2 single-mode fibres.16
Annex C (normative) Family specification for B1.3 single-mode fibres.18
Annex D (normative) Family specification for B2 single-mode fibres.21
Annex E (normative) Family specification for B4 single-mode fibres.24
Annex F (normative) Family specification for B5 single-mode fibres .27
Annex G (normative) Family specification for B6 single-mode fibres .30
Annex H (informative) System design information for B4 single-mode fibres .33
Annex I (informative) Map from IEC nomenclature to ITU-T recommendations .36
Bibliography.37

Figure H.1 – B4_d chromatic dispersion coefficient limits.34
Figure H.2 – B4_e chromatic dispersion coefficient limits.35

Table 1 – Dimensional attributes and measurement methods.8
Table 2 – Requirements common to class B fibres.9
Table 3 – Mechanical attributes and test methods.9
Table 4 – Requirements common to class B fibres.10
Table 5 – Transmission attributes and measurement methods .10
Table 6 – Requirements common to class B fibres.11
Table 7 – Additional attributes required in the family specifications.11
Table 8 – Environmental exposure tests .11
Table 9 – Attributes measured .11
Table 10 – Change in attenuation for environmental tests.12
Table 11 – Coating strip force for environmental tests.12
Table 12 – Tensile strength for environmental tests .12
Table 13 – Stress corrosion susceptibility for environmental tests.13
Table A.1 – Dimensional requirements specific to B1.1 fibres .14
Table A.2 – Mechanical requirements specific to B1.1 fibres.14

60793-2-50 © IEC:2008 – 3 –
Table A.3 – Transmission requirements specific to B1.1 fibres.15
Table B.1 – Dimensional requirements specific to B1.2 fibres .16
Table B.2 – Mechanical requirements specific to B1.2 fibres.17
Table B.3 – Transmission requirements specific to B1.2 fibres.
...