EN 61280-2-11:2006

SLOVENSKI SIST EN 61280-2-11:2006

STANDARD
julij 2006
Postopki preskušanja optičnega komunikacijskega podsistema – 2-11. del:
Digitalni sistemi – Ugotavljanje s povprečno vrednostjo faktorja Q z uporabo
ocenjevanja amplitudnega histograma za nadzorovanje kakovosti optičnega
signala (IEC 61280-2-11:2006)
Fibre optic communication subsystem test procedures – Part 2-11: Digital systems –
Averaged Q-factor determination using amplitude histogram evaluation for optical
signal quality monitoring (IEC 61280-2-11:2006)
ICS 33.180.01 Referenčna številka
©  Standard je založil in izdal Slovenski inštitut za standardizacijo. Razmnoževanje ali kopiranje celote ali delov tega dokumenta ni dovoljeno

EUROPEAN STANDARD
EN 61280-2-11
NORME EUROPÉENNE
April 2006
EUROPÄISCHE NORM
ICS 33.180.10
English version
Fibre optic communication subsystem test procedures
Part 2-11: Digital systems -
Averaged Q-factor determination
using amplitude histogram evaluation
for optical signal quality monitoring
(IEC 61280-2-11:2006)
Procédures d'essai des sous-systèmes  Prüfverfahren für Lichtwellenleiter-
de télécommunications à fibres optiques Kommunikationsuntersysteme
Partie 2-11: Systèmes numériques - Teil 2-11: Digitale Systeme -
Détermination du facteur de qualité Bestimmung des mittleren Q-Faktors durch
moyenné par l'évaluation d'histogramme Auswertung des Amplitudenhistogramms
d'amplitude pour la surveillance zur Qualitätsüberwachung
de la qualité des signaux optiques optischer Signale
(CEI 61280-2-11:2006) (IEC 61280-2-11:2006)

This European Standard was approved by CENELEC on 2006-02-01. 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 61280-2-11:2006 E
Foreword
The text of document 86C/682FDIS, future edition 1 of IEC 61280-2-11, prepared by SC 86C, Fibre optic
systems and active devices, of IEC TC 86, Fibre optics, was submitted to the IEC-CENELEC parallel vote
and was approved by CENELEC as EN 61280-2-11 on 2006-02-01.
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) 2006-11-01
– latest date by which the national standards conflicting
with the EN have to be withdrawn (dow) 2009-02-01
The International Electrotechnical Commission (IEC) and CENELEC draw attention to the fact that it is
claimed that compliance with this document may involve the use of a patent concerning the averaged
Q-factor measurement.
The IEC and CENELEC take no position concerning the evidence, validity and scope of this patent right.
The holder of this patent right has assured the IEC that he is willing to negotiate licences under
reasonable and non-discriminatory terms and conditions with applicants throughout the world. In this
respect, the statement of the holder of this patent right is registered with the IEC. Information may be
obtained from:
NTT Corporation
Tokyo
Japan
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights other than those identified above. IEC and CENELEC shall not be held responsible for
identifying any or all such patent rights.
Annex ZA has been added by CENELEC.
__________
Endorsement notice
The text of the International Standard IEC 61280-2-11:2006 was approved by CENELEC as a European
Standard without any modification.
__________
- 3 - EN 61280-2-11:2006
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 Where 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 61280-2-2 - Fibre optic communication subsystem test EN 61280-2-2 2005
procedures
Part 2-2: Digital systems - Optical eye
pattern, waveform and extinction ratio
measurement
1)
ITU-T - Optical transport network physical layer
Recommendation interfaces
G.959.1
1)
Undated reference.
2)
Valid edition at date of issue.

NORME CEI
INTERNATIONALE
IEC
61280-2-11
INTERNATIONAL
Première édition
STANDARD
First edition
2006-01
Procédures d'essai des sous-systèmes de
télécommunications à fibres optiques –
Partie 2-11:
Systèmes numériques – Détermination du facteur
de qualité moyenné par l'évaluation d'histogramme
d'amplitude pour la surveillance de la qualité des
signaux optiques
Fibre optic communication subsystem
test procedures –
Part 2-11:
Digital systems – Averaged Q-factor determination
using amplitude histogram evaluation for optical
signal quality monitoring
 IEC 2006 Droits de reproduction réservés  Copyright - all rights reserved
Aucune partie de cette publication ne peut être reproduite ni No part of this publication may be reproduced or utilized in any
utilisée sous quelque forme que ce soit et par aucun procédé, form or by any means, electronic or mechanical, including
électronique ou mécanique, y compris la photocopie et les photocopying and microfilm, without permission in writing from
microfilms, sans l'accord écrit de l'éditeur. the publisher.
International Electrotechnical Commission, 3, rue de Varembé, PO Box 131, CH-1211 Geneva 20, Switzerland
Telephone: +41 22 919 02 11 Telefax: +41 22 919 03 00 E-mail: inmail@iec.ch Web: www.iec.ch
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For price, see current catalogue

61280-2-11  IEC:2006 – 3 –
CONTENTS
FOREWORD.7
0 INTRODUCTION .11
0.1 Background.11
0.2 Averaged Q-factor formula .13

1 Scope.15
2 Normative references .15
3 Terms and definitions .17
4 Abbreviated terms .17
5 Apparatus.17
5.1 Optical bandpass filter.19
5.2 Receiver.19
5.3 Clock oscillator.21
5.4 Electrical pulse generator.21
5.5 Sampling module.21
5.6 Signal processing circuit.23
5.7 Monitoring system parameters.23
6 Procedure .23
6.1 Equipment connections .23
6.2 Threshold level definitions.23
7 Calculations .25

Annex A (normative) Measurement accuracy, reliability, and sensitivity .33
Annex B (informative) Crosstalk and frequency detuning of optical bandpass filter .39
Annex C (normative) Highest limit of Q .47
avg
Annex D (informative) Bit rate dependence .51
Annex E (informative) Format dependence .53
Annex F (informative) Dependence of Q σ |µ – µ |, and Q on chromatic
avg, 1,avg, 1,avg 0,avg
dispersion and OSNR .57
Annex G (informative) Relationship between Q and Q with PMD impairment .61
ave
Bibliography.65

Figure 1 – Asynchronous eye-pattern and amplitude histogram .13
Figure 2 – Averaged Q-factor measurement configuration.19
Figure 3 – Dependence of Q on Q for different α, when T = 1/4 × T s, B = 0,75
avg r slot re
× B Hz, B = 4 × B Hz, T = 1/256 × T s, N = 16 384 (2 ).29
opt res slot samp
Figure 4 – Dependence of R on α, when T = 1/4 × T s, B = 0,7 × B Hz, B = 4 ×
r slot re opt
B Hz, T = 1/256 × T s, N = 16 384 (2 ) .29
res slot samp
Figure 5 – Dependence of optimum value of α on B , when T = 1/4 × T s, B =
opt r slot re
0,75 × B Hz, T = 1/64 × T s, N = 16 384(2 ).31
res slot samp
61280-2-11  IEC:2006 – 5 –
Figure A.1 – Definition of ΔQ and ΔQ.33
avg
Figure A.2 – Dependence of the standard deviation of Q on N : T = 1/4 × T s,
avg samp r slot
–10
B = 0,7× B Hz, B = 4 × B Hz, T = 1/256 × T s, α = 0,3, Q = 16 dB (BER~10 ) .35
re opt res slot
Figure A.3 – Dependence of linear fitting slope of Q versus Q on B : T = 1/4 × T s,
avg opt r slot
B = 0,7 × B Hz, T = 1/256 × T s, α = 0,3.37
re res slot
Figure A.4 – Dependence of the standard deviation of eight measurement points of
Q on T : T = 1/4 × T s, B = 0,75 × B Hz, B = 4 × B Hz, N = 16 384(2 ),
avg res r slot re opt samp
–10
α = 0,3, Q = 16 dB (BER ~ 10 ).37
Figure B.1 – Definition of WDM signal and OBPF frequency response .39
Figure B.2 – Δf dependence of Q and Q for Δf of 100 GHz(a), 50 GHz(b),
obpf avg WDM
and 25 GHz(c) .41
Figure B.3 – Definition of OBPF central frequency detuning δf .43
c
Figure B.4 – δf dependence of Q for Δf of 100 GHz(a), 50 GHz(b), and
c avg WDM
25 GHz(c) .45
Figure C.1 – Dependence of Q on Q when B is 10 Gbit/s: T = 1/4 × T s,
avg r slot
B = 0,75 x B Hz, B = 4 x B GHz, T = 1/256 × T s, N = 16 384(2 ), α = 0,3.47
re opt res slot samp
Figure C.2 – Dependence of the highest limit of Q on rise time after O/E converter .49
avg
Figure D.1 – Example of relationship between Q and Q for different bit rates.51
avg
Figure E.1 – Dependence of Q on Q when D = 0 ps/nm, R = 0,4, B = 0,6 × B Hz,
avg duty re
B = 240 GHz, T = 1/64 × T s, N = 16 384(2 ) and α = 0,2 or 0,3 .53
opt res slot samp
Figure E.2 – Dependence of Q on Q when D = 1 020 ps/nm, R = 0,4, B = 0,6 × B Hz,
avg duty re
B = 240 GHz, T = 1/64 × T s, N = 16 384(2 ) and α = 0,2 or 0,3 .55
opt res slot samp
Figure F.1 (a) Chromatic dispersion dependence and (b) OSNR dependence of σ ,
µ -µ and Q for 10-Gbit/s NRZ optical signals when B is 40 GHz and α is 0,3.57
1 0 avg opt
Figure F.2 (a) Chromatic dispersion dependence and (b) OSNR dependence of σ ,
µ -µ and Q for 10-Gbit/s NRZ optical signals when B is 240 GHz and α is 0,2.57
1 0 avg opt
Figure G.1 – Dependence of Q on Q when mean DGD = 30 ps .
...