SIST EN IEC 61290-1-1:2021

SLOVENSKI STANDARD
SIST EN IEC 61290-1-1:2021
01-januar-2021
Nadomešča:
SIST EN 61290-1-1:2015
Optični ojačevalniki - Preskusne metode - 1-1. del: Močnostni in ojačevalni
parametri - Metoda z analizatorjem optičnega spektra (IEC 61290-1-1:2020)
Optical amplifiers - Test methods - Part 1-1: Power and gain parameters - Optical
spectrum analyzer method (IEC 61290-1-1:2020)
Prüfverfahren für Lichtwellenleiter-Verstärker - Teil 1-1: Optische Leistungs- und
Verstärkungsparameter - Verfahren mit optischem Spektralanalysator (IEC 61290-1-
1:2020)
Amplificateurs optiques - Méthodes d'essai - Partie 1-1: Paramètres de puissance et de
gain - Méthode de l'analyseur de spectre optique (IEC 61290-1-1:2020)
Ta slovenski standard je istoveten z: EN IEC 61290-1-1:2020
ICS:
33.180.30 Optični ojačevalniki Optic amplifiers
SIST EN IEC 61290-1-1:2021 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST EN IEC 61290-1-1:2021


EUROPEAN STANDARD EN IEC 61290-1-1

NORME EUROPÉENNE

EUROPÄISCHE NORM
October 2020
ICS 33.180.30 Supersedes EN 61290-1-1:2015 and all of its
amendments and corrigenda (if any)
English Version
Optical amplifiers - Test methods - Part 1-1: Power and gain
parameters - Optical spectrum analyzer method
(IEC 61290-1-1:2020)
Amplificateurs optiques - Méthodes d'essai - Partie 1-1: Prüfverfahren für Lichtwellenleiter-Verstärker - Teil 1-1:
Paramètres de puissance et de gain - Méthode de Optische Leistungs- und Verstärkungsparameter -
l'analyseur de spectre optique Verfahren mit optischem Spektralanalysator
(IEC 61290-1-1:2020) (IEC 61290-1-1:2020)
This European Standard was approved by CENELEC on 2020-10-08. 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 CEN-CENELEC
Management Centre 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 CEN-CENELEC Management Centre 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, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Turkey and the United Kingdom.



European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2020 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
 Ref. No. EN IEC 61290-1-1:2020 E

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SIST EN IEC 61290-1-1:2021
EN IEC 61290-1-1:2020 (E)
European foreword
The text of document 86C/1673(F)/FDIS, future edition 4 of IEC 61290-1-1, 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 approved by CENELEC as EN IEC 61290-1-1:2020.
The following dates are fixed:
• latest date by which the document has to be implemented at national (dop) 2021-07-08
level by publication of an identical national standard or by endorsement
• latest date by which the national standards conflicting with the (dow) 2023-10-08
document have to be withdrawn
This document supersedes EN 61290-1-1:2015 and all of its amendments and corrigenda (if any).
This document is to be used in conjunction with EN 61290-1 and EN IEC 61291-1.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CENELEC shall not be held responsible for identifying any or all such patent rights.
Endorsement notice
The text of the International Standard IEC 61290-1-1:2020 was approved by CENELEC as a
European Standard without any modification.
In the official version, for Bibliography, the following note has to be added for the standard indicated:
IEC 61290-10 series NOTE Harmonized as EN 61290-10 series
2

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SIST EN IEC 61290-1-1:2021
EN IEC 61290-1-1:2020 (E)
Annex ZA
(normative)

Normative references to international publications
with their corresponding European publications
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements 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 1 Where an International Publication has been modified by common modifications, indicated by (mod), the
relevant EN/HD applies.
NOTE 2 Up-to-date information on the latest versions of the European Standards listed in this annex is available
here: www.cenelec.eu.
Publication Year Title EN/HD Year
IEC 60793-2-50 - Optical fibres - Part 2–50: Product EN IEC 60793-2-50 -
specifications - Sectional specification for
class B single-mode fibres
IEC 61290-1 - Optical amplifiers - Test methods - Part 1: EN 61290-1 -
Power and gain parameters
IEC 61291-1 - Optical amplifiers - Part 1: Generic EN IEC 61291-1 -
specification


3

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SIST EN IEC 61290-1-1:2021



IEC 61290-1-1

®


Edition 4.0 2020-09




INTERNATIONAL



STANDARD




NORME


INTERNATIONALE











Optical amplifiers – Test methods –

Part 1-1: Power and gain parameters – Optical spectrum analyzer method



Amplificateurs optiques – Méthodes d'essai –

Partie 1-1: Paramètres de puissance et de gain – Méthode de l'analyseur de

spectre optique















INTERNATIONAL

ELECTROTECHNICAL

COMMISSION


COMMISSION

ELECTROTECHNIQUE


INTERNATIONALE




ICS 33.180.30 ISBN 978-2-8322-8749-1




Warning! Make sure that you obtained this publication from an authorized distributor.

Attention! Veuillez vous assurer que vous avez obtenu cette publication via un distributeur agréé.

® Registered trademark of the International Electrotechnical Commission
Marque déposée de la Commission Electrotechnique Internationale

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CONTENTS
FOREWORD . 3
1 Scope . 5
2 Normative references . 5
3 Terms, definitions, and abbreviated terms . 6
3.1 Terms and definitions . 6
3.2 Abbreviated terms . 6
4 Apparatus . 6
4.1 Test setup . 6
4.2 Characteristics of test equipment . 9
5 Test sample . 11
6 Procedure . 11
6.1 Gain and nominal output signal power . 11
6.2 PDG variation . 12
6.3 Maximum output signal power . 12
6.4 Maximum total output power . 12
6.5 Gain ripple . 12
6.5.1 General . 12
6.5.2 Method 1 – Signal gain method . 13
6.5.3 Method 2 – ASE method . 13
6.6 Detail requirements of apparatus . 14
7 Calculation . 14
7.1 Nominal output signal power . 14
7.2 Gain . 14
7.3 Polarization-dependent gain. 14
7.4 Maximum output signal power . 15
7.5 Maximum total output power . 15
7.6 Gain ripple . 15
7.6.1 Method 1 – Signal gain test method . 15
7.6.2 Method 2 – ASE method . 16
8 Test results . 17
Bibliography . 19

Figure 1 – Typical arrangement of optical spectrum analyzer test apparatus for gain
and power measurements . 7
Figure 2 – Typical arrangement of optical spectrum analyzer test apparatus for gain
ripple measurements . 8
Figure 3 – Example of gain ripple spectrum with the signal gain method . 16
Figure 4 – Example of gain ripple spectrum with ASE method . 17

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IEC 61290-1-1:2020 © IEC 2020 – 3 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________

OPTICAL AMPLIFIERS – TEST METHODS –

Part 1-1: Power and gain parameters –
Optical spectrum analyzer 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.
4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications
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 itself does not provide any attestation of conformity. Independent certification bodies provide conformity
assessment services and, in some areas, access to IEC marks of conformity. IEC is not responsible for any
services carried out by independent certification bodies.
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 61290-1-1 has been prepared by subcommittee 86C: Fibre optic
systems and active devices, of IEC technical committee 86: Fibre optics.
This fourth edition cancels and replaces the third edition published in 2015 and constitutes a
technical revision.
This edition includes the following significant technical change with respect to the previous
edition: addition of techniques to test gain ripple of SOAs.
The text of this International Standard is based on the following documents:
FDIS Report on voting
86C/1673/FDIS 86C/1687/RVD

Full information on the voting for the approval of this International Standard can be found in the
report on voting indicated in the above table.

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This document has been drafted in accordance with the ISO/IEC Directives, Part 2.
This document is to be used in conjunction with IEC 61290-1 and IEC 61291-1.
A list of all parts of the IEC 61290 series, published under the general title Optical amplifiers –
Test methods can be found on the IEC website.
The committee has decided that the contents of this document will remain unchanged until the
stability date indicated on the IEC website under "http://webstore.iec.ch" in the data related to
the specific document. At this date, the document will be
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.

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IEC 61290-1-1:2020 © IEC 2020 – 5 –
OPTICAL AMPLIFIERS – TEST METHODS –

Part 1-1: Power and gain parameters –
Optical spectrum analyzer method



1 Scope
This part of IEC 61290 applies to all commercially available optical amplifiers (OAs) and
optically amplified modules. It applies to OAs using optical fibre amplifiers (OFAs) based on
either rare-earth doped fibres or on the Raman effect, semiconductor OAs (SOAs) and planar
optical waveguide amplifiers (POWAs).
The object of this document is to establish uniform requirements for accurate and reliable
measurements, by means of the optical spectrum analyzer (OSA) test method, of the following
OA parameters, as defined in IEC 61291-1:
a) nominal output signal power;
b) gain;
c) polarization-dependent gain (PDG);
d) maximum output signal power;
e) maximum total output power.
In addition, this document provides the test method of:
f) gain ripple (for SOAs).
NOTE All numerical values followed by (‡) are suggested values for which the measurement is assured.
The object of this document is specifically directed to single-channel amplifiers. Test methods
1
for multichannel amplifiers are standardized in IEC 61290-10 (all parts) [1] .
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements 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 60793-2-50, Optical fibres – Part 2-50: Product specifications – Sectional specification for
class B single-mode fibres
IEC 61290-1, Optical amplifiers – Test methods – Part 1: Power and gain parameters
IEC 61291-1, Optical amplifiers – Part 1: Generic specification
___________
1
Numbers in square brackets refer to the Bibliography.

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3 Terms, definitions, and abbreviated terms
3.1 Terms and definitions
For the purposes of this document, the terms and definitions given in IEC 61291-1 apply.
ISO and IEC maintain terminological databases for use in standardization at the following
addresses:
• IEC Electropedia: available at http://www.electropedia.org/
• ISO Online browsing platform: available at http://www.iso.org/obp
3.2 Abbreviated terms
ASE amplified spontaneous emission
DBR distributed Bragg reflector (laser diode)
DFB distributed feed-back (laser diode)
ECL external cavity laser (diode)
LED light emitting diode
OA optical amplifier
OFA optical fibre amplifier
OSA optical spectrum analyzer
PDG polarization-dependent gain
POWA planar optical waveguide amplifier
SOA semiconductor optical amplifier
4 Apparatus
4.1 Test setup
A diagram of the test set-up for gain and power measurements is given in Figure 1, showing
the set-up for calibration in Figure 1 a), the set-up for input signal power measurement in
Figure 1 b), and the set-up for output power measurement in Figure 1 c).
The test set-up for gain ripple measurements is displayed in Figure 2, showing the set-up for
calibration in Figure 2 a), the set-up for input signal power measurement in Figure 2 b), and two
different set-ups for gain ripple measurement in Figure 2 c) and Figure 2 d).

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IEC 61290-1-1:2020 © IEC 2020 – 7 –

a) – Calibration

b) – Input signal power measurement

c) – Output power measurement
Key
J1, J2 optical connector
Figure 1 – Typical arrangement of optical spectrum
analyzer test apparatus for gain and power measurements

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a) – Calibration

b) – Input signal power measurement

c) – Gain ripple measurement (signal gain method)

d) – Gain ripple measurement (ASE method)
Key
J1, J2 optical connector
Figure 2 – Typical arrangement of optical spectrum
analyzer test apparatus for gain ripple measurements

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IEC 61290-1-1:2020 © IEC 2020 – 9 –
4.2 Characteristics of test equipment
The test equipment listed below, with the required characteristics, is needed.
a) Optical source
The optical source shall be either fixed wavelength or wavelength-tuneable.
– Fixed-wavelength optical source
This optical source shall generate light with a wavelength and optical power specified in
the product specification or equivalent. Unless otherwise specified, the optical source
shall emit a continuous wave with the full width at half maximum of the spectrum
narrower than 1 nm (‡). A distributed feed-back (DFB) laser, a distributed Bragg reflector
(DBR) laser, an external cavity laser (ECL) diode and a light emitting diode (LED) with
a narrow-band filter are applicable, for example. The suppression ratio for the side
modes for the DFB laser, the DBR laser, or the ECL shall be higher than 30 dB (‡). The
output power fluctuation shall be less than 0,05 dB (‡), which may be better attainable
with an optical isolator at the output port of the optical source. Spectral broadening at
the foot of the lasing spectrum shall be minimal for laser sources, and the ratio of the
source power to total spontaneous emission power of the laser shall be more than 30 dB.
– Wavelength-tuneable optical source
This optical source shall be able to generate wavelength-tuneable light within the range
specified in the product specification or equivalent. Its optical power shall be specified
in the product specification or equivalent. Unless otherwise specified, the optical source
shall emit a continuous wave with the full width at half maximum of the spectrum
narrower than 1 nm (‡). An ECL or an LED with a narrow bandpass optical filter is
applicable, for example. The suppression ratio of side modes for the ECL shall be higher
than 30 dB (‡). The output power fluctuation shall be less than 0,05 dB, which may be
more easily attainable with an optical isolator at the output port of the optical source.
Spectral broadening at the foot of the lasing spectrum shall be minimal for the ECL.
Spectral broadening at the foot of the lasing spectrum shall be minimal for laser sources,
and the ratio of the source power to total spontaneous emission power of the laser shall
be more than 30 dB.
– Narrow band wavelength-tuneable optical source
This optical source shall be able to generate wavelength-tuneable light within the range
specified in the product specification or equivalent. Its optical power shall be specified
in the product specification or equivalent. Unless otherwise specified, the optical source
shall emit a continuous wave with the full width at half maximum of the spectrum
narrower (for example, one tenth) than the gain ripple period to be measured. An ECL
or an LED with a narrow bandpass optical filter is applicable, for example. The
suppression ratio of side modes for the ECL shall be higher than 30 dB (‡). The output
power fluctuation shall be less than 0,05 dB, which may be more easily attainable with
an optical isolator at the output port of the optical source. Spectral broadening at the
foot of the lasing spectrum shall be minimal for the ECL. Spectral broadening at the foot
of the lasing spectrum shall be minimal for laser sources, and the ratio of the source
power to total spontaneous emission power of the laser shall be more than 30 dB.
The use of an LED shall be limited to small-signal gain measurements.
b) Optical power meter
It shall have a measurement uncertainty less than 0,2 dB, irrespective of the state of
polarization, within the operational wavelength bandwidth of the OA. A dynamic range 10 dB
higher than the measured gain shall be required (e.g. 40 dB).
c) Optical spectrum analyzer (OSA)
Within the operational wavelength bandwidth of the OA, the linearity of the spectral power
measurement shall be less than the desired gain uncertainty and at most 0,5 dB, and the
amplitude stability of the spectral power measurement shall be less than the desired power
uncertainty and at least less than 0,4 dB over the duration of the measurement. Polarization
dependence of the spectral power measurement shall be less than 1,0 dB. The wavelength
measurement uncertainty shall be less than 0,5 nm. A dynamic range 10 dB higher than the

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measured gain shall be required (e.g. 40 dB). The spectral resolution shall be equal or less
than 1 nm.
The amplifier stability is the maximum degree of amplitude fluctuation expressed by the ratio
of the maximum and minimum optical power over the duration of the measurement.
d) Optical isolator
Optical isolators may be used to bracket the OA. The polarization-dependent loss variation
of the isolator shall be less than 0,2 dB (‡). Small wavelength dependent loss is
recommended. Optical isolation shall be more than 40 dB (‡). The reflectance from this
device shall be smaller than –40 dB (‡) at each port.
e) Variable optical attenuator
The attenuation range and stability shall be over 40 dB (‡) and less than 0,2 dB (‡),
respectively. The reflectance from this device shall be smaller than −40 dB (‡) at each port.
The attenuation stability is the maximum degree of attenuation fluctuation expressed by the
ratio of the maximum and minimum optical attenuation over the duration of the measurement
after setting a certain attenuation setpoint.
f) Polarization controller
This device shall be able to provide as input signal light all possible states of polarization
(e.g. linear, elliptical and circular). For example, the polarization controller may consist of a
linear polarizer followed by an all-fibre-type polarization controller or by a linear polarizer
followed by a quarter-wave plate rotatable by minimum of 90° and a half wave plate rotatable
by minimum of 180°. The loss variation of the polarization controller shall be less than 0,2 dB
(‡). The reflectance from this device shall be smaller than −40 dB (‡) at each port. The use
of a polarization controller is considered optional, except for the measurement of PDG, but
may also be necessary to achieve the desired uncertainty of other power and gain
parameters for OA devices exhibiting significant PDG.
g) Optical fibre jumpers
The optical fibre jumpers shall be of the same fibre category defined in IEC 60793-2-50 as
the fibres used as input and output ports of the OA, so that the mode field diameters of the
optical fibre jumpers closely match those of the input and output fibres of the OA. The
reflectance from this device shall be smaller than −40 dB (‡) at each port, and the length of
the jumper shall be shorter than 2 m. Polarization maintaining fibre shall be used for the
input fibre jumper when testing gain ripple in an SOA, if the gain ripple of the SOA is
sensitive to the state of polarization.
h) Optical connectors, J1 and J2
The connection loss repeatability shall be less than 0,4 dB. The repeatability of the
connection loss, ΔL is defined as the range of 3σ of the distribution of measured values
expressed in Formula (1):
   (dB) (1)
ΔL= 3σ
where σ is the standard deviation of the measurements calculated by Formula (2):
2
m
1
2

σ Lj−L
( )
  (dB) (2)
∑

m
j=1
where
m is the number of measurements;
L(j) is the measurement value of the connector loss;
L is the mean value of the measurement value of the connector loss.
A minimum of ten times (m = 10) is recommended to provide a reasonable estimate of σ.
=

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i) Analyzer
This device shall be able to provide linear polarized light from the power emitted from the
DUT and adjust to an arbitrary polarization axis. The polarization extinction ratio shall be
more than 20 dB.
j) Non-reflective terminator
A non-reflective terminator shall be used for the ASE method of gain ripple measurement
when the SOA module does not have an isolator at the input side. The reflectance from this
device shall be smaller than −40 dB (‡) at each port.
5 Test sample
The OA under test shall operate at nominal operating conditions. If the OA is likely to cause
laser oscillations due to unwanted reflections, optical isolators shall be used to bracket the OA
under test. This will reduce signal instability and measurement uncertainty.
Except for the SOA, standard optical fibres type B-652.B or B-652.D, as defined in
IEC 60793-2-50, are recommended. However, other fibre types may be used as input/output
fibre. If fibre types other than B-652.B or B-652.D are used as input/output fibre, the mode field
diameter of the optical fibre jumpers shall closely match those of the input and output fibres of
the OA (see 4.2 g)). For measurements of the parameters of Clause 1, care shall be taken to
maintain the sta
...