EN 61290-5-2:2004

SLOVENSKI SIST EN 61290-5-2:2005

STANDARD
februar 2005
Optični ojačevalniki – Preskusne metode – 5-2. del: Parametri odbojnosti –
Metoda z električnim spektralnim analizatorjem (IEC 61290-5-2:2003)
Optical amplifiers - Test methods - Part 5-2: Reflectance parameters - Electrical
spectrum analyser method (IEC 61290-5-2:2003)
ICS 33.180.30 Referenčna številka
©  Standard je založil in izdal Slovenski inštitut za standardizacijo. Razmnoževanje ali kopiranje celote ali delov tega dokumenta ni dovoljeno

EUROPEAN STANDARD EN 61290-5-2
NORME EUROPÉENNE
EUROPÄISCHE NORM May 2004
ICS 33.180.30
English version
Optical amplifiers –
Test methods
Part 5-2: Reflectance parameters –
Electrical spectrum analyser method
(IEC 61290-5-2:2003)
Amplificateurs optiques –  Prüfverfahren für Lichtwellenleiter-
Méthodes d'essai Verstärker
Partie 5-2: Paramètres du facteur Teil 5-2: Reflexionsparameter –
de réflexion – Verfahren mit einem elektrischen
Méthode de l'analyseur de spectre Spektralanalysator
électrique (IEC 61290-5-2:2003)
(CEI 61290-5-2:2003)
This European Standard was approved by CENELEC on 2004-05-01. 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, Czech
Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia,
Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia, Slovenia, 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

© 2004 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.

Ref. No. EN 61290-5-2:2004 E
Foreword
The text of document 86C/547/FDIS, future edition 1 of IEC 61290-5-2, 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 61290-5-2 on 2004-05-01.
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) 2005-02-01
– latest date by which the national standards conflicting
with the EN have to be withdrawn (dow) 2007-05-01
Annex ZA has been added by CENELEC.
__________
Endorsement notice
The text of the International Standard IEC 61290-5-2:2003 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 60793-1 NOTE Harmonized in EN 60793-1 series (partly modified).
IEC 60825-1 NOTE Harmonized as EN 60825-1:1994 (not modified).
IEC 60825-2 NOTE Harmonized as EN 60825-1:2000 (not modified).
IEC 60874-1 NOTE Harmonized as EN 60874-1:1999 (not modified).
__________
- 3 - EN 61290-5-2:2004
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
IEC 61291-1 1998 Optical fibre amplifiers EN 61291-1 1998
Part 1: Generic specification
NORME CEI
INTERNATIONALE IEC
61290-5-2
INTERNATIONAL
Première édition
STANDARD
First edition
2003-10
Amplificateurs optiques –
Méthodes d'essai –
Partie 5-2:
Paramètres du facteur de réflexion –
Méthode de l'analyseur de spectre électrique
Optical amplifiers –
Test methods –
Part 5-2:
Reflectance parameters –
Electrical spectrum analyser method
 IEC 2003 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
CODE PRIX
N
Commission Electrotechnique Internationale PRICE CODE
International Electrotechnical Commission
Международная Электротехническая Комиссия
Pour prix, voir catalogue en vigueur
For price, see current catalogue

61290-5-2  IEC:2003 – 3 –
CONTENTS
FOREWORD . 5
1 Scope and object . 9
2 Normative references. 9
3 Abbreviated terms. 9
4 Apparatus .11
5 Test sample .15
6 Procedure .15
6.1 Input reflectance .15
6.1.1 General.15
6.1.2 Calibration .17
6.1.3 OFA input reflectance measurement.21
6.2 Output reflectance .21
6.2.1 General.21
6.2.2 Calibration .23
6.2.3 OFA output reflectance measurement.25
7 Calculation.27
8 Test results.27
Bibliography .29
Figure 1 – Configurations for electrical spectrum analyser measurement methods
for OFA reflectance .11
Figure 2 – Configurations for determining polarization controller, optical branching
device and optical isolator insertion loss measurement .17
Figure 3 – Measurement of OFA input power .19
Figure 4 – Measurement of inherent reflectance of test set-up .19
Figure 5 – Measurement of the loss of the optical branching device .21
Figure 6 – Measurement of input probe power .23
Figure 7 – Measurement of the inherent reflectance of the test set-up.25
Figure 8 – Measurement OFA input signal power .25

61290-5-2  IEC:2003 – 5 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
OPTICAL AMPLIFIERS – TEST METHODS –
Part 5-2: Reflectance parameters –
Electrical spectrum analyser method
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
this end and in addition to other activities, IEC publishes International Standards, Technical Specifications,
Technical Reports, Publicly Available Specifications (PAS) and Guides (hereafter referred to as “IEC
Publication(s)”). 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. 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 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 IEC National Committees.
3) IEC Publications have the form of recommendations for international use and are accepted by IEC National
Committees in that sense. While all reasonable efforts are made to ensure that the technical content of IEC
Publications is accurate, IEC cannot be held responsible for the way in which they are used or for any
misinterpretation by any end user.
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transparently to the maximum extent possible in their national and regional publications. Any divergence
between any IEC Publication and the corresponding national or regional publication shall be clearly indicated in
the latter.
5) IEC provides no marking procedure to indicate its approval and cannot be rendered responsible for any
equipment declared to be in conformity with an IEC Publication.
6) All users should ensure that they have the latest edition of this publication.
7) No liability shall attach to IEC or its directors, employees, servants or agents including individual experts and
members of its technical committees and IEC National Committees for any personal injury, property damage or
other damage of any nature whatsoever, whether direct or indirect, or for costs (including legal fees) and
expenses arising out of the publication, use of, or reliance upon, this IEC Publication or any other IEC
Publications.
8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is
indispensable for the correct application of this publication.
9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of
patent rights. IEC shall not be held responsible for identifying any or all such patent rights.
International Standard IEC 61290-5-2 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/547/FDIS 86C/571/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 2.

61290-5-2  IEC:2003 – 7 –
IEC 61290-5 consists of the following parts under the new general title Optical amplifiers – Test
methods – Reflectance parameters:
Part 5-1: Optical spectrum analyser
Part 5-2: Electrical spectrum analyser method
Part 5-3: Reflectance tolerance using electrical spectrum analyser
Future standards in this series will carry the new general title as cited above. Titles of existing
standards in this series will be updated at the time of the next edition.
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.
61290-5-2  IEC:2003 – 9 –
OPTICAL AMPLIFIERS – TEST METHODS –
Part 5-2: Reflectance parameters –
Electrical spectrum analyser method
1 Scope and object
This part of IEC 61290 applies to optical fibre amplifiers (OFAs) using active fibres, containing
rare-earth dopants, presently commercially available.
The object of this part of IEC 61290 is to establish uniform requirements for accurate and
reliable measurements, by means of the electrical spectrum analyser test method, of the
following OFA parameters, as defined in IEC 61291-1:
a) input reflectance;
b) output reflectance.
NOTE 1 All numerical values followed by (‡) are currently under study.
NOTE 2 The measurement uncertainty should be better than ±1 dB.
2 Normative references
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.
IEC 61291-1, Optical fibre amplifiers – Part 1: Generic specification
3 Abbreviated terms
For the purposes of this document, the following abbreviations apply:
ASE Amplified spontaneous emission
DFB Distributed feedback (laser diode)
EA Electro-absorption
ESA Electrical spectrum analyser
MZ Mach-Zehnder
OFA Optical fibre amplifier
OSA Optical spectrum analyser
61290-5-2  IEC:2003 – 11 –
4 Apparatus
The measurement set-ups are shown in Figure 1.
Optical branching
device
Frequency Polarization
Tx dB OA
synthesizer
controller
Terminated port
Variable
attenuator
Rx
ESA
Terminated port
Isolator
Receiver
IEC  2207/03
Figure 1a – OFA input reflectance
Frequency
synthesizer
f1
Polarization
Tx
controller
Optical branching
device
Polarization
Tx
dB OA
controller
Isolator
Frequency
Terminated port
synthesizer
f2
X
Optical
spectrum dB
analyser
Isolator
Polarization
Y
beam splitter
Electrical
spectrum
Rx
analyser
Receiver
IEC  2208/03
Figure 1b – OFA o
...