EN 60793-1-41:2010
(Main)Optical fibres - Part 1-41: Measurement methods and test procedures - Bandwidth
Optical fibres - Part 1-41: Measurement methods and test procedures - Bandwidth
IEC 60793-1-41:2010 describes three methods for determining and measuring the modal bandwidth of multimode optical fibres (see IEC 60793-2-10, IEC 60793-30 series and IEC 60793-40 series). The baseband frequency response is directly measured in the frequency domain by determining the fibre response to a sinusoidaly modulated light source. The baseband response can also be measured by observing the broadening of a narrow pulse of light. The calculated response is determined using differential mode delay (DMD) data. The three methods are: - Method A - Time domain (pulse distortion) measurement - Method B - Frequency-domain measurement - Method C - Overfilled launch modal bandwidth calculated from differential mode delay (OMBc). The main change with respect to the previous edition is the addition of a third method for determining modal bandwidth based on DMD data and to improve measurement procedures for A4 fibres. This standard should be read in conjunction with IEC 60793-1-1 and IEC 60793-1-2, which cover generic specifications.
Lichtwellenleiter - Teil 1-41: Messmethoden und Prüfverfahren - Bandbreite
Fibres optiques - Partie 1-41: Méthodes de mesure et procédures d'essai - Largeur de bande
La CEI 60793-1-41:2010 décrit trois méthodes pour déterminer et mesurer la largeur de bande modale des fibres optiques multimodales (voir CEI 60793-2-10, série CEI 60793-30 et série CEI 60793-40). La réponse en fréquence de bande de base est directement mesurée dans le domaine fréquentiel en déterminant la réponse de la fibre à une source lumineuse modulée de manière sinusoïdale. La réponse en bande de base peut aussi être mesurée en observant l'élargissement d'une impulsion étroite de lumière. La réponse calculée est déterminée en utilisant les données de retard de mode différentiel (differential mode delay - DMD). Les trois méthodes sont les suivantes: - Methode A - Mesure dans le domaine temporel (distorsion d'impulsion) - Methode B - Mesure dans le domaine fréquentiel - Methode C - Largeur de bande modale d'injection saturée calculée à partir du retard de mode différentiel (OMBc). La modification principale par rapport à la précédente édition est l'addition d'une troisième méthode pour la détermination de la largeur de bande modale fondée sur les données de DMD et afin d'améliorer les procédures de mesure pour les fibres A4. Il convient d'utiliser cette norme conjointement à la CEI 60793-1-1 et à la CEI 60793-1-2, qui couvrent les spécifications génériques.
Optična vlakna - 1-41. del: Metode merjenja in preskusni postopki Pasovna širina (IEC 60793-1-41:2010)
Ta del IEC 60793 opisuje tri metode za določanje in merjenje modalne pasovne širine večrodovnih optičnih vlaken (glej IEC 60793-2-10, serijo IEC 60793-30 in serijo IEC 60793-40). Frekvenčni odziv osnovnega frekvenčnega pasu se meri neposredno v frekvenčni domeni z ugotavljanjem odziva vlaken na sinusoidno modulirani svetlobni vir. Odziv osnovnega frekvenčnega pasu se lahko meri tudi z opazovanjem širjenja ozkega svetlobnega impulza. Izračunani odziv se določi s podatki o diferenčni zakasnitvi rodov (DMD). Tri metode so: • Metoda A – meritev časovne domene (popačenje impulza) • Metoda B – merjenje frekvenčne domene • Metoda C – prenapolnjena zagonska modalna pasovna širina, izračunana iz diferenčne zakasnitve rodov (OMBc) Metodi A in B se lahko izvajata z uporabo enega od dveh zagonov: s prenapolnjenim stanjem pred začetkom proizvodnje (OFL) ali s stanjem pred začetkom proizvodnje v omejenem načinu (RML). Metoda C je definirana le za večrodovna optična vlakna A1a.2 (in A1a.3 v pripravi) in uporablja uteženo seštevanje zagonskih odzivov DMD z utežmi, ki ustrezajo prenapolnjenemu zagonu. Glede na vrsto vlakna se izbereta ustrezna preskusna metoda in stanje pred začetkom proizvodnje.
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Standards Content (Sample)
SLOVENSKI STANDARD
01-december-2010
1DGRPHãþD
SIST EN 60793-1-41:2004
2SWLþQDYODNQDGHO 0HWRGHPHUMHQMDLQSUHVNXVQLSRVWRSNL3DVRYQDãLULQD
,(&
Optical fibres - Part 1-41: Measurement methods and test procedures - Bandwidth (IEC
60793-1-41:2010)
Lichtwellenleiter - Teil 1-41: Messmethoden und Prüfverfahren - Bandbreite (IEC 60793-
1-41:2010)
Fibres optiques - Partie 1-41: Méthodes de mesure et procédures d'essai - Largeur de
bande (CEI 60793-1-41:2010)
Ta slovenski standard je istoveten z: EN 60793-1-41:2010
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 60793-1-41
NORME EUROPÉENNE
October 2010
EUROPÄISCHE NORM
ICS 33.180.10 Supersedes EN 60793-1-41:2003
English version
Optical fibres -
Part 1-41: Measurement methods and test procedures -
Bandwidth
(IEC 60793-1-41:2010)
Fibres optiques - Lichtwellenleiter -
Partie 1-41: Méthodes de mesure Teil 1-41: Messmethoden
et procédures d'essai - und Prüfverfahren -
Largeur de bande Bandbreite
(CEI 60793-1-41:2010) (IEC 60793-1-41:2010)
This European Standard was approved by CENELEC on 2010-10-01. 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, 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
© 2010 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.
Ref. No. EN 60793-1-41:2010 E
Foreword
The text of document 86A/1294/CDV, future edition 3 of IEC 60793-1-41, 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 60793-1-41 on 2010-10-01.
This European Standard supersedes EN 60793-1-41:2003.
The main change with respect to EN 60793-1-41:2003 is the addition of a third method for determining
modal bandwidth based on DMD data and to improve measurement procedures for A4 fibres.
This standard should be read in conjunction with EN 60793-1-1 and IEC 60793-1-2, which cover generic
specifications.
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) 2011-07-01
– latest date by which the national standards conflicting
with the EN have to be withdrawn (dow) 2013-10-01
Annex ZA has been added by CENELEC.
__________
Endorsement notice
The text of the International Standard IEC 60793-1-41:2010 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:
[1] IEC 60793-2-10 NOTE Harmonized as EN 60793-2-10.
[2] IEC 60793-2-30 NOTE Harmonized as EN 60793-2-30.
[3] IEC 60793-2-40 NOTE Harmonized as EN 60793-2-40.
__________
- 3 - EN 60793-1-41:2010
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 60793-1-20 - Optical fibres - EN 60793-1-20 -
Part 1-20: Measurement methods and test
procedures - Fibre geometry
IEC 60793-1-42 - Optical fibres - EN 60793-1-42 -
Part 1-42: Measurement methods and test
procedures - Chromatic dispersion
IEC 60793-1-43 - Optical fibres - EN 60793-1-43 -
Part 1-43: Measurement methods and test
procedures - Numerical aperture
IEC 60793-1-49 2006 Optical fibres - EN 60793-1-49 2006
Part 1-49: Measurement methods and test
procedures - Differential mode delay
IEC 60793-1-41 ®
Edition 3.0 2010-08
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Optical fibres –
Part 1-41: Measurement methods and test procedures – Bandwidth
Fibres optiques –
Partie 1-41: Méthodes de mesure et procédures d'essai – Largeur de bande
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
PRICE CODE
INTERNATIONALE
U
CODE PRIX
ICS 33.180.10 ISBN 978-2-88912-170-0
– 2 – 60793-1-41 © IEC:2010
CONTENTS
FOREWORD.4
1 Scope.6
2 Normative references .6
3 Terms and definitions .7
4 Apparatus.7
4.1 Radiation source .7
4.1.1 Method A – Time domain (pulse distortion) measurement.7
4.1.2 Method B – Frequency domain measurement .8
4.1.3 Method C – Overfilled launch modal bandwidth calculated from
differential mode delay (OMBc) .8
4.1.4 For methods A and B.8
4.2 Launch system .8
4.2.1 Overfilled launch (OFL) .8
4.2.2 Restricted mode launch (RML) .9
4.2.3 Differential mode delay (DMD) launch .10
4.3 Detection system.10
4.4 Recording system.10
4.5 Computational equipment.11
4.6 Overall system performance .11
5 Sampling and specimens.11
5.1 Test sample .11
5.2 Reference sample .11
5.3 End face preparation .11
5.4 Test sample packaging.12
5.5 Test sample positioning.12
6 Procedure .12
6.1 Method A – Time domain (pulse distortion) measurement.12
6.1.1 Output pulse measurement.12
6.1.2 Input pulse measurement method A-1: reference sample from test
sample .12
6.1.3 Input pulse measurement method A-2: periodic reference sample .12
6.2 Method B – Frequency domain measurement .13
6.2.1 Output frequency response.13
6.2.2 Method B-1: Reference length from test specimen.13
6.2.3 Method B-2: Reference length from similar fibre .13
6.3 Method C – Overfilled launch modal bandwidth calculated from differential
mode delay (OMBc).13
7 Calculations or interpretation of results .14
7.1 -3 dB frequency, f .14
3 dB
7.2 Calculations for optional reporting methods .15
8 Length normalization .15
9 Results .15
9.1 Information to be provided with each measurement .15
9.2 Information available upon request.15
10 Specification information .16
Annex A (normative) Intramodal dispersion factor and the normalized intermodal
dispersion limit.17
60793-1-41 © IEC:2010 – 3 –
Annex B (normative) Fibre transfer function, H(f), power spectrum, |H(f)|, and f .20
3 dB
Annex C (normative) Calculations for other reporting methods.22
Annex D (normative) Mode scrambler requirements for overfilled launching conditions
to multimode fibres .23
Bibliography.28
Figure 1 – Mandrel wrapped mode filter .10
Figure D.1 – Two examples of optical fibre scramblers .24
Table 1 – DMD weights for calculating overfilled modal bandwidth (OMBc) from DMD
data for 850 nm only .14
Table A.1 – Highest expected dispersion for commercially available A1 fibres .17
– 4 – 60793-1-41 © IEC:2010
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
OPTICAL FIBRES –
Part 1-41: Measurement methods and test procedures –
Bandwidth
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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agreement between the two organizations.
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consensus of opinion on the relevant subjects since each technical committee has representation from all
interested IEC National Committees.
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Committees in that sense.
...
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