IEC 61291-2:2007

INTERNATIONAL IEC
STANDARD
CEI
61291-2
NORME
Second edition
INTERNATIONALE
Deuxième édition
2007-04
Optical amplifiers –
Part 2:
Digital applications –
Performance specification template

Amplificateurs optiques –
Partie 2:
Applications numériques –
Modèles de spécifications de fonctionnement
Reference number
Numéro de référence
IEC/CEI 61291-2:2007
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INTERNATIONAL IEC
STANDARD
CEI
61291-2
NORME
Second edition
INTERNATIONALE
Deuxième édition
2007-04
Optical amplifiers –
Part 2:
Digital applications –
Performance specification template

Amplificateurs optiques –
Partie 2:
Applications numériques –
Modèles de spécifications de fonctionnement
PRICE CODE
L
Commission Electrotechnique Internationale CODE PRIX
International Electrotechnical Commission
МеждународнаяЭлектротехническаяКомиссия
For price, see current catalogue
Pour prix, voir catalogue en vigueur

– 2 – 61291-2 © IEC:2007
CONTENTS
FOREWORD.3
INTRODUCTION.5

1 Scope and object .6
2 Normative references.6
3 Definitions and abbreviated terms .6
3.1 Definitions .6
3.2 Abbreviated terms .6
4 Product specification worksheet for power amplifiers.7
5 Product specification worksheet for pre-amplifiers.8
6 Product specification worksheet for line amplifiers.9
7 Electromagnetic compatibility (EMC) requirements .10

Bibliography .11

Table 1 – Minimum list of relevant parameters of power amplifiers to be specified for
digital applications.7
Table 2 – Minimum list of relevant parameters of pre-amplifiers to be specified for
digital applications.8
Table 3 – Minimum list of relevant parameters of line amplifiers to be specified for
digital applications.9

61291-2 © IEC:2007 – 3 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
OPTICAL AMPLIFIERS –
Part 2: Digital applications –
Performance specification template

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, 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. 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) 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
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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) All users should ensure that they have the latest edition of this publication.
7) No liability shall attach to IEC or its directors, employ
ees, servants or agents including individual experts and
members of its technical committees and IEC National Committees for any personal injury, property damage or
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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 61291-2 has been prepared by subcommittee 86C: Fibre optic
systems and active devices, of IEC technical committee 86: Fibre optics.
This second edition cancels and replaces the first edition published in 2000 and constitutes a
technical revision. The main significant changes are the following:
a) the applicability has been extended to all commercially available optical amplifiers, not just
optical fibre amplifiers;
b) Clause 7, EMC has been added;
c) references to applicable test methods have been updated.
This standard shall be used in conjunction with IEC 61291-1. It was established on the basis of
the second (2006) edition of that standard.

– 4 – 61291-2 © IEC:2007
The text of this standard is based on the following documents:
CDV Report on voting
86C/728/CDV 86C/743/RVC
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.
A list of all parts of the IEC 61291 series, published under the general title Optical amplifiers
can be found on the IEC website.
The committee has decided that the contents of this publication will remain unchanged until the
maintenance result date indicated on the IEC web site under "http://webstore.iec.ch" in the data
related to the specific publication. At this date, the publication will be
• reconfirmed;
• withdrawn;
• replaced by a revised edition, or
• amended.
61291-2 © IEC:2007 – 5 –
INTRODUCTION
This International Standard is devoted to the subject of optical amplifiers. The technology of
optical amplifiers is still rapidly evolving, hence amendments and new additions to this
standard can be expected.
– 6 – 61291-2 © IEC:2007
OPTICAL AMPLIFIERS –
Part 2: Digital applications –
Performance specification template

1 Scope and object
This performance specification template applies to optical amplifier (OA) devices to be used in
digital applications.
The object of this performance specification template is to provide a frame for the preparation
of detail specifications on the performances of OA devices to be used in digital applications.
Detail specification writers may add specification parameters and/or groups of specification
parameters for particular applications. However, detail specification writers may not remove
specification parameters specified in this standard.
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 61290 (all parts), Optical amplifiers – Test methods
IEC 61291-1, Optical amplifiers – Part 1: Generic specification
IEC 61291-5-2, Optical amplifiers – Part 5-2: Qualification specifications – Reliability
qualification for optical fibre amplifiers
IEC 60825-1:1993, Safety of laser products – Part 1: Equipment classification, requirements
and user's guide
3 Terms, definitions and abbreviated terms
3.1 Terms and definitions
For the purpose of this document, the terms and definitions of IEC 61291-1 apply. Possible
supplementary definitions specific to OAs for digital applications may be given in detail
specifications.
3.2 Abbreviated terms
Each abbreviation introduced in this standard is explained in the text at least the first time it
appears. However, for an easier understanding of the whole text, the following is a list of all
abbreviations used in this standard:
OA  Optical amplifier
EMC Electromagnetic compatibility
ESD Electrostatic discharge
61291-2 © IEC:2007 – 7 –
4 Product specification worksheet for power amplifiers
The following worksheet contains a minimum list of specification parameters to be included in
detail specifications of OA devices to be used as power amplifiers in digital applications,
together with their specification criteria (that is in terms of maximum value, minimum value or
both) and the indication of the corresponding standard test method.
Table 1 – Minimum list of relevant parameters of
power amplifiers to be specified for digital applications
Parameters Unit Minimum Maximum IEC Reference
value value
Transmission Input power range dBm  IEC 61290-1 series
characteristics
Output power range dBm  IEC 61290-1 series

Power wavelength band nm  IEC 61290-1 series
Gain dB  IEC 61290-1 series
a
Signal-spontaneous noise figure dB  NA IEC 61290-3 series
Polarization dependent gain dB NA IEC 61290-1 series
Reverse amplified spontaneous dBm NA IEC 61290-3 series
emission power level
Input reflectance dB NA IEC 61290-5 series
Maximum reflectance tolerable dB NA IEC 61290-5 series
at input
Maximum reflectance tolerable dB NA IEC 61290-5 series
at output
Pump leakage to input dBm NA IEC 61290-6 series
Pump leakage to output dBm NA IEC 61290-6 series
Maximum total output power dBm NA IEC 61290-1 series
Safety laser classification NA NA IEC 60825-1
Environmental
reliability and
Operating temperature ° C  IEC 61291-5-2
safety parameters
Maximum operating relative % NA IEC 61291-5-2

humidity
Maximum Range of Hz  IEC 61291-5-2
operating frequencies
vibration
Amplitude mm NA IEC 61291-5-2
severity
peak-to-peak
Storage temperature ° C  IEC 61291-5-2
Maximum storage % NA IEC 61291-5-2
relative humidity
Maximum Drop height mm  IEC 61291-5-2
shock
severity,
free drop
Failure rate FIT NA IEC 61291-5-2
a
NA: not applicable.
– 8 – 61291-2 © IEC:2007
5 Product specification worksheet for pre-amplifiers
The following worksheet contains a minimum list of specification parameters to be included in
detail specifications of OA devices to be used as pre-amplifiers in digital applications, together
with their specification criteria (that is in terms of maximum value, minimum value or both) and
the indication of the corresponding standard test method.
Table 2 – Minimum list of relevant parameters of
pre-amplifiers to be specified for digital applications
Parameters Unit Minimum Maximum IEC Reference
value value
Transmission Input power range dBm  IEC 61290-1 series
characteristics
Output power range dBm  IEC 61290-1 series

Wavelength band nm  IEC 61290-1 series
Available signal wavelength band nm  IEC 61290-1 series
Gain dB  IEC 61290-1 series
Signal-spontaneous noise figure dB NA IEC 61290-3 series
Polarization dependent gain dB NA IEC 61290-1 series
Forward amplified spontaneous dBm NA IEC 61290-3 series
emission power level
Reverse amplified spontaneous dBm NA IEC 61290-3 series
emission power level
Input reflectance dB NA IEC 61290-5 series
Maximum reflectance tolerable dB NA IEC 61290-5 series
at input
Maximum reflectance tolerable dB NA IEC 61290-5 series
at output
Pump leakage to input dBm NA IEC 61290-6 series
Pump leakage to output dBm NA IEC 61290-6 series
Maximum total output power dBm NA IEC 61290-1 series
Environmental Safety laser classification NA NA IEC 60825-1
and safety
Operating temperature ° C  IEC 61291-5-2
parameters
Maximum operating relative % NA IEC 61291-5-2

humidity
Maximum Range of Hz  IEC 61291-5-2
operating frequencies
vibration
Amplitude mm NA IEC 61291-5-2
severity
peak-to-peak
Storage temperature ° C  IEC 61291-5-2
Maximum storage % NA IEC 61291-5-2
relative humidity
Maximum Drop height mm  IEC 61291-5-2
shock
severity,
free drop
61291-2 © IEC:2007 – 9 –
6 Product specification worksheet for line amplifiers
The following worksheet contains a minimum list of specification parameters to be included in
detail specifications of OA devices to be used as line amplifiers in digital applications, together
with their specification criteria (that is in terms of maximum value, minimum value or both) and
the indication of the corresponding standard test method.
Table 3 – Minimum list of relevant parameters of
line amplifiers to be specified for digital applications
Parameters Unit Minimum Maximum IEC Reference
value value
Transmission Input power range dBm  IEC 61290-2 series
characteristics
Output power range dBm  IEC 61290-2 series
Saturation output power dBm NA IEC 61290-2 series
Power wavelength band nm  IEC 61290-2 series
Signal-spontaneous noise figure dB NA IEC 61290-3 series
Polarization dependent gain dB NA IEC 61290-1 series
Forward amplified spontaneous dBm NA IEC 61290-3 series
emission power level
Reverse amplified spontaneous dBm NA IEC 61290-3 series
emission power level
Input reflectance dB NA IEC 61290-5 series
Maximum reflectance tolerable dB NA IEC 61290-5 series
at input
Maximum reflectance tolerable dB NA IEC 61290-5 series
at output
Pump leakage to input dBm NA IEC 61290-6 series
Pump leakage to output dBm NA IEC 61290-6 series
Maximum total output power dBm NA IEC 61290-2 series
Polarization mode dispersion ps NA IEC 62290-11 series
Environmental Safety laser classification NA NA IEC 60825-1
and safety
Operating temperature ° C  IEC 61291-5-2
parameters
Maximum operating relative % NA IEC 61291-5-2

humidity
Maximum Range of Hz  IEC 6129
...