SIST EN 61280-2-9:2004
(Main)Fibre optic communication subsystem test procedures -- Part 2-9: Digital systems - Optical signal-to-noise ratio measurement for dense wavelength-division multiplexed systems
Fibre optic communication subsystem test procedures -- Part 2-9: Digital systems - Optical signal-to-noise ratio measurement for dense wavelength-division multiplexed systems
Provides a parameter definition and test method for obtaining optical signal-to-noise ratio (OSNR) using apparatus that measure the optical spectrum at a multichannel interface. The measured noise does not include source relative intensity noise (RIN) or receiver noise. Three implementations for an OSA are discussed: a diffraction-grating-based OSA, a Michelson interferometer-based OSA, and a Fabry-Perot-based OSA. Characteristics of the OSA that affect OSNR measurement accuracy are provided.
Prüfverfahren für Lichtwellenleiter-Kommunikationsuntersysteme -- Teil 2-9: Digitale Systeme - Messung des optischen Signal-Rausch-Verhältnisses für dichte Wellenlängen-Multiplex-Systeme
Procédures d'essai des sous-systèmes de télécommunication à fibres optiques -- Partie 2-9: Systèmes numériques - Mesure du rapport signal sur bruit optique pour les systèmes multiplexés à répartition en longueur d'onde dense
Provides a parameter definition and test method for obtaining optical signal-to-noise ratio (OSNR) using apparatus that measure the optical spectrum at a multichannel interface. The measured noise does not include source relative intensity noise (RIN) or receiver noise. Three implementations for an OSA are discussed: a diffraction-grating-based OSA, a Michelson interferometer-based OSA, and a Fabry-Perot-based OSA. Characteristics of the OSA that affect OSNR measurement accuracy are provided.
Preskusni postopki komunikacijskega podsistema optičnih vlaken – 2-9. del: Digitalni sistemi - Merjenje optičnega razmerja med signalom in hrupom pri gostih mnogokratnih sistemih z valovno dolžino (IEC 61280-2-9:2002)*
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Standards Content (Sample)
SLOVENSKI SIST EN 61280-2-9:2004
STANDARD
september 2004
Preskusni postopki komunikacijskega podsistema optičnih vlaken – 2-9. del:
Digitalni sistemi - Merjenje optičnega razmerja med signalom in hrupom pri
gostih mnogokratnih sistemih z valovno dolžino (IEC 61280-2-9:2002)*
Fibre optic communication subsystem test procedures - Part 2-9: Digital systems -
Optical signal-to-noise ratio measurement for dense wavelength-division
multiplexed systems (IEC 61280-2-9:2002)
ICS 33.180.20 Referenčna številka
SIST EN 61280-2-9:2004(en)
© Standard je založil in izdal Slovenski inštitut za standardizacijo. Razmnoževanje ali kopiranje celote ali delov tega dokumenta ni dovoljeno
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EUROPEAN STANDARD EN 61280-2-9
NORME EUROPÉENNE
EUROPÄISCHE NORM December 2002
ICS 33.180.20
English version
Fibre optic communication subsystem test procedures
Part 2-9: Digital systems –
Optical signal-to-noise ratio measurement
for dense wavelength-division multiplexed systems
(IEC 61280-2-9:2002)
Procédures d'essai des sous-systèmes Prüfverfahren für Lichtwellenleiter-
de télécommunications à fibres optiques Kommunikationsuntersysteme
Partie 2-9: Systèmes numériques – Teil 2-9: Digitale Systeme –
Mesure du rapport signal sur bruit optique Messung des optischen
pour les systèmes multiplexés Signal-Rausch-Verhältnisses für dichte
à répartition en longueur d'onde dense Wellenlängen-Multiplex-Systeme
(CEI 61280-2-9:2002) (IEC 61280-2-9:2002)
This European Standard was approved by CENELEC on 2002-11-01. 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, Czech Republic,
Denmark, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Luxembourg, Malta,
Netherlands, Norway, Portugal, Slovakia, Spain, Sweden, Switzerland and 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
© 2002 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.
Ref. No. EN 61280-2-9:2002 E
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EN 61280-2-9:2002 - 2 -
Foreword
The text of document 86C/457/FDIS, future edition 1 of IEC 61280-2-9, 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 61280-2-9 on 2002-11-01.
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) 2003-08-01
– latest date by which the national standards conflicting
with the EN have to be withdrawn (dow) 2005-11-01
Annexes designated "informative" are given for information only.
In this standard, annex A is informative.
__________
Endorsement notice
The text of the International Standard IEC 61280-2-9:2002 was approved by CENELEC as a European
Standard without any modification.
__________
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NORME
CEI
INTERNATIONALE IEC
61280-2-9
INTERNATIONAL
Première édition
STANDARD
First edition
2002-10
Procédures d'essai des sous-systèmes de
télécommunications à fibres optiques –
Partie 2-9:
Systèmes numériques – Mesure du rapport signal
sur bruit optique pour les systèmes multiplexés
à répartition en longueur d'onde dense
Fibre optic communication subsystem
test procedures –
Part 2-9:
Digital systems – Optical signal-to-noise ratio
measurement for dense wavelength-division
multiplexed systems
© IEC 2002 Droits de reproduction réservés ⎯ Copyright - all rights reserved
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Pour prix, voir catalogue en vigueur
For price, see current catalogue
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61280-2-9 © IEC:2002 – 3 –
CONTENTS
FOREWORD . 5
INTRODUCTION .9
1 Scope .11
2 Normative references.13
3 Definitions.13
4 Apparatus .15
4.1 Diffraction grating-based OSA.15
4.2 Michelson interferometer-based OSA .17
4.3 Fabry-Perot-based OSA .17
4.4 OSA performance requirements .19
4.4.1 Wavelength range .19
4.4.2 Sensitivity .19
4.4.3 Resolution bandwidth (RBW).19
4.4.4 Resolution bandwidth accuracy .19
4.4.5 Dynamic range.19
4.4.6 Scale fidelity .21
4.4.7 Polarization dependence .21
4.4.8 Wavelength data points.21
5 Sampling and specimens .23
6 Procedure .23
7 Calculations .23
8 Measurement uncertainty .23
9 Documentation.25
Annex A (informative) Error in measuring signal level due to signal spectral width.27
Bibliography .33
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61280-2-9 © IEC:2002 – 5 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
FIBRE OPTIC COMMUNICATION SUBSYSTEM TEST PROCEDURES –
Part 2-9: Digital systems – Optical signal-to-noise ratio measurement
for dense wavelength-division multiplexed systems
FOREWORD
1) The IEC (International Electrotechnical Commission) is a worldwide organization for standardization comprising
all national electrotechnical committees (IEC National Committees). The object of the IEC is to promote
international co-operation on all questions concerning standardization in the electrical and electronic fields. To
this end and in addition to other activities, the IEC publishes International Standards. Their preparation is
entrusted to technical committees; any IEC National Committee interested in the subject dealt with may
participate in this preparatory work. International, governmental and non-governmental organizations liaising
with the IEC also participate in this preparation. The IEC collaborates closely with the International Organization
for Standardization (ISO) in accordance with conditions determined by agreement between the two
organizations.
2) The formal decisions or agreements of the IEC on technical matters express, as nearly as possible, an
international consensus of opinion on the relevant subjects since each technical committee has representation
from all interested National Committees.
3) The documents produced have the form of recommendations for international use and are published in the form
of standards, technical specifications, technical reports or guides and they are accepted by the National
Committees in that sense.
4) In order to promote international unification, IEC National Committees undertake to apply IEC International
Standards transparently to the maximum extent possible in their national and regional standards. Any
divergence between the IEC Standard and the corresponding national or regional standard shall be clearly
indicated in the latter.
5) The IEC provides no marking procedure to indicate its approval and cannot be rendered responsible for any
equipment declared to be in conformity with one of its standards.
6) Attention is drawn to the possibility that some of the elements of this International Standard may be the subject
of patent rights. The IEC shall not be held responsible for identifying any or all such patent rights.
International Standard IEC 61280-2-9 has been prepared by subcommittee 86C: Fibre optic
systems and active devices, of IEC technical committee 86: Fibre optics
The text of this standard is based on the following documents:
FDIS Report on voting
86C/457/FDIS 86C/479/RVD
Full information on the voting for the approval of this standard can be found in the report on
voting indicated in the above table.
This publication has been drafted in accordance with the ISO/IEC Directives, Part 3.
Annex A is for information only.
The committee has decided that the contents of this publication will remain unchanged until
2008. At this date, the publication will be
• reconfirmed;
• withdrawn;
• replaced by a revised edition, or
• amended.
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61280-2-9 © IEC:2002 – 7 –
IEC 61280-2 consists of the following parts, under the general title Fibre optic communication
1)
subsystem test procedures :
Part 2-1: Test procedures for digital systems – Receiver sensitivity and overload
measurement
Part 2-2: Test procedures for digital systems – Optical eye pattern, waveform, and extinction
ratio
Part 2-4: Test procedures for digital systems – Bit-rate tolerance measurement
Part 2-5: Test procedures for digital systems – Jitter transfer function measurement
Part 2-9: Digital systems – Optical signal-to-noise ratio measurement for dense wavelength-
division multiplexed systems
___________
1)
The general title of the IEC 61280 series has changed. Parts 2-1, 2-2, 2-4 and 2-5 were published under the
general title Fibre optic communication subsystem basic test procedures
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61280-2-9 © IEC:2002 – 9 –
INTRODUCTION
At the optical interfaces within wavelength-division multiplexed (WDM) networks, it is desirable
to measure parameters that provide information about the integrity of the physical plant. Such
parameters are necessary to monitor network performance as an integral part of network
management. They are also necessary to assure proper system operation for installation and
maintenance of the network.
Ideally, such parameters would directly correspond to the bit error ratio (BER) of each channel
of a multichannel carrier at the particular optical interface. Related parameters such as Q-
factor or those calculated from optical eye patterns would provide similar information, that is,
they would correlate to the channel BER. However, it is difficult to obtain access to these
parameters at a multichannel interface point. It is necessary to demultiplex the potentially large
number of channels and make BER, Q-factor, or eye-diagram measurements on a per-channel
basis.
In contrast, useful information about the optical properties of the multichannel carrier is readily
obtained by measuring the optical spectrum. Wavelength-resolved signal and noise levels
provide information on signal level, signal wavelength, and amplified spontaneous emission
(ASE) for each channel. Spectral information, however, does not show signal degradation due
to waveshape impairments resulting from polarization-mode dispersion (PMD), and chromatic
dispersion. Also, intersymbol interface and time jitter are not revealed from an optical signal to
noise ratio (OSNR) measurement. In spite of these limitations, OSNR is listed as an interface
parameter in ITU-T Recommendation G.692; “Optical interfaces for multichannel systems with
2)
optical amplifiers.”[1] OSNR is also listed in ITU-T Recommendation G.959.1, “Optical
transport network physical layer interfaces.”
___________
2)
Figures in brackets refer to the bibliography.
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61280-2-9 © IEC:2002 – 11 –
FIBRE OPTIC COMMUNICATION SUBSYSTEM TEST PROCEDURES –
Part 2-9: Digital systems – Optical signal-to-noise ratio measurement
for dense wavelength-division multiplexed systems
1 Scope
This part of IEC 61280 provides a parameter definition and a test method for obtaining optical
signal-to-noise ratio (OSNR) using apparatus that measures the optical spectrum at a
multichannel interface. Because noise measurement is made on an optical spectrum analyzer,
the measured noise does not include source relative intensity noise (RIN) or receiver noise.
Three implementations for an optical spectrum analyser (OSA) are discussed: a diffraction-
grating-based OSA, a Michelson interferometer-based OSA, and a Fabry-Perot-based OSA.
Performance characteristics of the OSA that affect OSNR measurement accuracy are provided.
A typical optical spectrum at
...
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