EN 60793-1-49:2006

Optical fibres - Part 1-49: Measurement methods and test procedures - Differential mode delay

Describes a method for characterizing the modal structure of a graded-index multimode fibre. The information is useful for assessing the bandwidth performance of a fibre when used with laser sources. Applies only to multimode, graded-index glass-core (category A1) fibres. The test method is commonly used in production and research facilities, however is not easily accomplished in the field.

Lichtwellenleiter - Teil 1-49: Messmethoden und Prüfverfahren - Gruppenlaufzeitdifferenz

Fibres optiques - Partie 1-49: Méthodes de mesure et procédures d'essai - Retard différentiel de mode

Décrit une méthode de caractérisation de la structure modale d'une fibre multimodale à gradient d'indice. Cette information est utile pour évaluer les performances de largeur de bande d'une fibre lorsqu'elle est utilisée avec des sources lasers. S'applique uniquement aux fibres multimodales à cur en verre à gradient d'indice (catégorie A1). Cette méthode d'essai est généralement utilisée dans les installations de production et de recherche et n'est pas facilement réalisée sur le terrain

Optična vlakna - 1-49. del: Merilne metode in postopki preskušanja - Diferenčna zakasnitev rodov (IEC 60793-1-49:2006)

General Information

• Status: Withdrawn
• Publication Date: 23-Jul-2006
• Withdrawal Date: 30-Jun-2009
• ICS: 33.180.10 - Fibres and cables
• Technical Committee: CLC/TC 86A - Optical fibres and optical fibre cables
• Drafting Committee: IEC/SC 86A - IEC_SC_86A
• Parallel Committee: IEC/SC 86A - IEC_SC_86A
• Current Stage: 9960 - Withdrawal effective - Withdrawal
• Start Date: 19-Sep-2021
• Completion Date: 19-Sep-2021
• Ref Project: SIST EN 60793-1-49:2007 - Optical fibres -- Part 1-49: Measurement methods and test procedures - Differential mode delay

Relations

• Replaces: EN 60793-1-49:2003 - Optical fibres - Part 1-49: Measurement methods and test procedures - Differential mode delay
• Effective Date: 28-Jan-2023
• Replaced By: EN IEC 60793-1-49:2018 - Optical fibres - Part 1-49: Measurement methods and test procedures - Differential mode delay
• Effective Date: 06-Nov-2018

Standards Content (Sample)

SLOVENSKI STANDARD
01-december-2007
1DGRPHãþD
SIST EN 60793-1-49:2004
2SWLþQDYODNQD±GHO0HULOQHPHWRGHLQSRVWRSNLSUHVNXãDQMD±'LIHUHQþQD
]DNDVQLWHYURGRY,(&
Optical fibres -- Part 1-49: Measurement methods and test procedures - Differential
mode delay (IEC 60793-1-49:2006)
Optische Schnittstellen von Lichtwellenleiter-Steckverbindern -- Teil 2-1: Optische
Schnittstelle von nicht abgeschrägten Einmodenfasern mit physikalischem Kontakt (IEC
60793-1-49:2006)
Interfaces optiques de connecteurs pour fibres optiques -- Partie 2-1: Interfaces optiques
pour fibres unimodales en contact physique sans angles (IEC 60793-1-49:2006)
Ta slovenski standard je istoveten z: EN 60793-1-49:2006
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 60793-1-49
NORME EUROPÉENNE
July 2006
EUROPÄISCHE NORM
ICS 33.180.10 Supersedes EN 60793-1-49:2003

English version
Optical fibres
Part 1-49: Measurement methods and test procedures -
Differential mode delay
(IEC 60793-1-49:2006)
Fibres optiques  Lichtwellenleiter
Partie 1-49: Méthodes de mesure et Teil 1-49: Messmethoden und
procédures d'essai - Prüfverfahren -
Retard différentiel de mode Gruppenlaufzeitdifferenz
(CEI 60793-1-49:2006) (IEC 60793-1-49:2006)

This European Standard was approved by CENELEC on 2006-07-01. 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, 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

© 2006 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.
Ref. No. EN 60793-1-49:2006 E
Foreword
The text of document 86A/1061/FDIS, future edition 2 of IEC 60793-1-49, 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 60793-1-49 on 2006-07-01.
This European Standard supersedes EN 60793-1-49:2003.
It adds minimum calculated effective modal bandwidth (EMBc) to the test procedures, supporting
EN 60793-2-10.
This standard is to be read in conjunction with EN 60793-1-1 and EN 60793-2-10.
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) 2007-04-01
– latest date by which the national standards conflicting
with the EN have to be withdrawn (dow) 2009-07-01
Annex ZA has been added by CENELEC.
__________
Endorsement notice
The text of the International Standard IEC 60793-1-49:2006 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 60825-1 NOTE  Harmonized as EN 60825-1:1994 (not modified).
IEC 60825-2 NOTE  Harmonized as EN 60825-2:2004 (not modified).

__________
- 3 - EN 60793-1-49:2006
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 2003
Part 1-1: Measurement methods and test
procedures - General and guidance

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 60793-1-41 - Optical fibres EN 60793-1-41 2003
Part 1-41: Measurement methods and test
procedures - Bandwidth
1) 2)
IEC 60793-1-42 - Optical fibres EN 60793-1-42 2002
Part 1-42: Measurement methods and test
procedures - Chromatic dispersion

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 60793-2-10 - Optical fibres EN 60793-2-10 2004
Part 2-10: Product specifications - Sectional
specification for category A1 multimode fibres

1) 2)
IEC 61280-1-4 - Fibre optic communication subsystem test EN 61280-1-4 2003
procedures
Part 1-4: General communication
subsystems - Collection and reduction of two-
dimensional nearfield data for multimode fibre
laser transmitters
1)
Undated reference.
2)
Valid edition at date of issue.

NORME CEI
INTERNATIONALE
IEC
60793-1-49
INTERNATIONAL
Deuxième édition
STANDARD
Second edition
2006-06
Fibres optiques –
Partie 1-49:
Méthodes de mesure et procédures d'essai –
Retard différentiel de mode
Optical fibres –
Part 1-49:
Measurement methods and test procedures –
Differential mode delay
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60793-1-49  IEC:2006 – 3 –
CONTENTS
FOREWORD.5
1 Scope.9
2 Normative references .9
3 Terms and definitions .11
4 Apparatus.13
4.1 Optical source .13
4.2 Stability .13
4.3 Launch system .13
4.4 Detection system.15
4.5 Computational equipment.17
5 Sampling and specimens.17
5.1 Test sample .17
5.2 Specimen endfaces .17
5.3 Specimen length.17
5.4 Specimen packaging .17
5.5 Specimen positioning .17
6 Procedure .17
6.1 Adjust and measure system response .17
6.2 Adjust detection system.19
6.3 Measure the test sample .19
7 Calculations and interpretation of results.21
7.1 Differential mode delay (DMD) .21
7.2 Minimum calculated effective modal bandwidth .21
7.3 Length normalization .25
8 Documentation .25
8.1 Report the following information for each test:.25
8.2 The following information shall be available upon request: .25
9 Specification information .25

Annex A (normative) Source spectral width limitation.29
Annex B (informative) Discussion of measurement details .35
Annex C (informative) Determining DMD weights for EMBc calculation .43
Annex D (informative)  EMBc calculation information .49
Annex E (informative)  Comparison between this standard and ITU recommendations .55

Bibliography.57

Figure B.1 – Idealized DMD data .35

Table A.1 –Highest expected dispersion for any of the commercially available
Category A1 fibres .33
Table D.1 – DMD weightings – Example set 1.49
Table D.2 – DMD weightings – Example set 2.51

60793-1-49  IEC:2006 – 5 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
OPTICAL FIBRES –
Part 1-49: Measurement methods and test procedures –
Differential mode delay
FOREWORD
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