IEC 61291-5-2:2017

Optical amplifiers - Part 5-2: Qualification specifications - Reliability qualification for optical fibre amplifiers

IEC 61291-5-2:2017 applies to optical amplifiers (OAs) and optically amplified, elementary sub-systems for terrestrial applications, using active fibres (optical fibre amplifiers (OFAs)) containing rare-earth dopants, which are commercially available. The black box approach is used in this document. The black box approach is adopted in order to give product specifications which are independent of OA implementation details. For reliability qualification purposes, some information about the internal components is needed; these internal parts are themselves treated as black boxes. This document gives requirements for the evaluation of OA reliability by combining the reliability of such internal black boxes. The object of this document is to specify the minimum list of reliability qualification tests, requirements on failure criteria during testing and on reliability predictions, and give the relevant normative references to establish a standard method for the assessment of the reliability of OFA devices and sub-systems in order to minimize risks and to promote product development and reliability qualification. This second edition cancels and replaces the first edition published in 2002. It constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition:
a) removal of the contents on the relating quality management system from scope, terms and definitions, and the reliability requirements;
b) moving fit-rate calculation to Annex B (informative);
c) change of requirements for shock test;
d) amendment of abbreviations related to changes a) and b).
The contents of the corrigendum of May 2019 have been included in this copy.

Amplificateurs optiques - Partie 5-2: Spécifications de qualification - Qualification de fiabilité pour amplificateurs à fibres optiques

IEC 61291-5-2: 2017 s’applique aux amplificateurs optiques (AO) et aux sous‑systèmes élémentaires amplifiés optiquement pour des applications terrestres, utilisant des fibres actives (amplificateurs à fibres optiques, AFO), qui contiennent des dopants de terres rares, disponibles sur le marché. L’approche de boîte noire est utilisée dans le présent document. L’approche de boîte noire est adoptée afin de fournir des spécifications de produits qui sont indépendantes des détails de mise en service des AO. Pour les besoins de qualification de fiabilité, certaines informations sur les composants internes sont nécessaires; ces parties internes sont elles-mêmes traitées en tant que boîtes noires. Le présent document fournit des exigences relatives à l’évaluation de la fiabilité des AO en combinant la fiabilité de telles boîtes noires internes. Le présent document a pour objet de fournir la liste minimale des essais de qualification de fiabilité, des exigences en matière de critères de défaillance pendant les essais et de prévisions de fiabilité, et de donner des références normatives pertinentes afin d’établir une méthode normalisée pour l'évaluation de la fiabilité des modules et des sous-systèmes AFO afin de réduire le plus possible les risques et d’avancer le développement du produit et la qualification de la fiabilité. Cette deuxième édition annule et remplace la première édition parue en 2002. Cette édition constitue une révision technique. Cette édition inclut les modifications techniques majeures suivantes par rapport à l'édition précédente:
a) le contenu sur le système de management de la qualité a été retiré du domaine d’application, des termes et définitions et des exigences de fiabilité;
b) le calcul du taux de défaillance dans le temps (FIT) a été déplacé à l’Annexe B (informative);
c) les exigences relatives aux essais de chocs ont été modifiées;
d) les abréviations ont été modifiées en fonction des modifications a) et b).

General Information

• Status: Published
• Publication Date: 24-Jan-2017
• ICS: 01 - GENERALITIES. TERMINOLOGY. STANDARDIZATION. DOCUMENTATION
• ICS: 33.180.30 - Optic amplifiers
• Technical Committee: SC 86C - Fibre optic systems and active devices
• Drafting Committee: WG 3 - TC 86/SC 86C/WG 3
• Current Stage: PPUB - Publication issued
• Start Date: 23-Feb-2017
• Completion Date: 25-Jan-2017

Relations

• Corrected By: IEC 61291-5-2:2017/COR1:2019 - Corrigendum 1 - Optical amplifiers - Part 5-2: Qualification specifications - Reliability qualification for optical fibre amplifiers
• Effective Date: 05-Sep-2023
• Revises: IEC 61291-5-2:2002 - Optical amplifiers - Part 5-2: Qualification specifications - Reliability qualification for optical fibre amplifiers
• Effective Date: 05-Sep-2023

Standards Content (Sample)

IEC 61291-5-2 ®
Edition 2.0 2017-01
INTERNATIONAL
STANDARD
Optical amplifiers –
Part 5-2: Qualification specifications – Reliability qualification for optical fibre
amplifiers
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form
or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from
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copyright or have an enquiry about obtaining additional rights to this publication, please contact the address below or
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IEC 61291-5-2 ®
Edition 2.0 2017-01
INTERNATIONAL
STANDARD
Optical amplifiers –
Part 5-2: Qualification specifications – Reliability qualification for optical fibre

amplifiers
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 33.180.30 ISBN 978-2-8322-3855-4

– 2 – IEC 61291-5-2:2017 © IEC 2017
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 Reliability requirements . 7
4.1 Tests . 7
4.1.1 General . 7
4.1.2 Reliability qualification of components . 7
4.1.3 Reliability qualification of the OFA assembly process . 8
4.1.4 Reliability qualification of the OFA device or sub-system . 8
4.1.5 Structural similarity . 10
Annex A (normative) Procedures for reliability testing of OFA components . 11
A.1 General . 11
A.2 Tests required for passive optical components . 11
A.3 Tests required for the doped fibre . 11
Annex B (informative) Reliability calculations . 12
B.1 Reliability calculation . 12
B.2 Guidance on failure rate calculations . 13
Bibliography . 14

Table 1 – Minimum test list for passive optical components, pump laser modules,
monitor diode modules and optical connectors . 7
Table 2 – Minimum test list for doped fibre . 8
Table 3 – Tests required for splices . 8
Table 4 – Minimum list for tests required on OFA devices and sub-systems . 9
Table A.1 – Tests required for the doped fibre . 11
Table B.1 – Failure rate of components . 13

INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
OPTICAL AMPLIFIERS –
Part 5-2: Qualification specifications – Reliability qualification
for optical fibre amplifiers
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 61291-5-2 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 2002. It constitutes a
technical revision.
This edition includes the following significant technical changes with respect to the previous
edition:
a) removal of the contents on the relating quality management system from scope, terms and
definitions, and the reliability requirements;
b) moving fit-rate calculation to Annex B (informative);
c) change of requirements for shock test;
d) amendment of abbreviations related to changes a) and b).

– 4 – IEC 61291-5-2:2017 © IEC 2017
The text of this International Standard is based on the following documents:
CDV Report on voting
86C/1376/CDV 86C/1426/RVC
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.
This document has been drafted in accordance with the ISO/IEC Directives, Part 2.
A list of all parts in 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 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.
A bilingual version of this publication may be issued at a later date.
The contents of the corrigendum of May 2019 have been included in this copy.

OPTICAL AMPLIFIERS –
Part 5-2: Qualification specifications – Reliability qualification
for optical fibre amplifiers
1 Scope
This part of IEC 61291 applies to optical amplifiers (OAs) and optically amplified, elementary
sub-systems for terrestrial applications, using active fibres (optical fibre amplifiers (OFAs))
containing rare-earth dopants, which are commercially available.
The black box approach is used in this document. The black box approach is adopted in order
to give product specifications which are independent of OA implementation details. For
reliability qualification purposes, some information about the internal components is needed;
these internal parts are themselves treated as black boxes. This document gives
requirements for the evaluation of OA reliability by combining the reliability of such internal
black boxes.
The object of this document is to specify the minimum list of reliability qualification tests,
requirements on failure criteria during testing and on reliability predictions, and give the
relevant normative references to establish a standard method for the assessment of the
reliability of OFA devices and sub-systems in order to minimize risks and to promote product
development and reliability qualification.
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 60050-731, International Electrotechnical Vocabulary – Chapter 731: Optical fibre
communication
IEC 60068-2-2:2007, Environmental testing – Part 2-2: Tests – Test B: Dry heat
IEC 60068-2-14, Environmental testing – Part 2-14: Tests – Test N: Change of temperature
IEC 60068-2-21, Environmental testing – Part 2-21: Tests – Test U: Robustness of
terminations and integral mounting devices
IEC 60068-2-27, Environmental testing – Part 2-27: Tests – Test Ea and guidance: Shock
IEC 60068-2-31, Tests – Test Ec: Rough handling shocks, primarily for equipment-type
specimens
IEC 60068-2-78, Environmental testing – Part 2-78: Tests – Test Cab: Damp heat, steady
state
IEC 61291-1, Optical fibre amplifiers – Part 1: Generic specification

– 6 – IEC 61291-5-2:2017 © IEC 2017
IEC 61300-2-4, Fibre optic interconnecting devices and passive components – Basic test and
measurement procedures – Part 2-4: Tests – Fibre/cable retention
IEC
...

IEC 61291-5-2 ®
Edition 2.0 2017-01
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Optical amplifiers –
Part 5-2: Qualification specifications – Reliability qualification for optical fibre
amplifiers
Amplificateurs optiques –
Partie 5-2: Spécifications de qualification – Qualification de fiabilité pour
amplificateurs à fibres optiques

All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form
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International Standards for all electrical, electronic and related technologies.

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IEC 61291-5-2 ®
Edition 2.0 2017-01
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Optical amplifiers –
Part 5-2: Qualification specifications – Reliability qualification for optical fibre

amplifiers
Amplificateurs optiques –
Partie 5-2: Spécifications de qualification – Qualification de fiabilité pour

amplificateurs à fibres optiques

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 33.180.30 ISBN 978-2-8322-9361-4

– 2 – IEC 61291-5-2:2017 © IEC 2017
CONTENTS
CONTENTS . 2
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 Reliability requirements . 7
4.1 Tests . 7
4.1.1 General . 7
4.1.2 Reliability qualification of components . 7
4.1.3 Reliability qualification of the OFA assembly process . 8
4.1.4 Reliability qualification of the OFA device or sub-system . 8
4.1.5 Structural similarity . 10
Annex A (normative) Procedures for reliability testing of OFA components . 11
A.1 General . 11
A.2 Tests required for passive optical components . 11
A.3 Tests required for the doped fibre . 11
Annex B (informative) Reliability calculations . 12
B.1 Reliability calculation . 12
B.2 Guidance on failure rate calculations . 13
Bibliography . 14

Table 1 – Minimum test list for passive optical components, pump laser modules,
monitor diode modules and optical connectors . 7
Table 2 – Minimum test list for doped fibre . 8
Table 3 – Tests required for splices . 8
Table 4 – Minimum list for tests required on OFA devices and sub-systems . 9
Table A.1 – Tests required for the doped fibre . 11
Table B.1 – Failure rate of components . 13

INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
OPTICAL AMPLIFIERS –
Part 5-2: Qualification specifications – Reliability qualification
for optical fibre amplifiers
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 61291-5-2 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 2002. It constitutes a
technical revision.
This edition includes the following significant technical changes with respect to the previous
edition:
a) removal of the contents on the relating quality management system from scope, terms and
definitions, and the reliability requirements;
b) moving fit-rate calculation to Annex B (informative);
c) change of requirements for shock test;
d) amendment of abbreviations related to changes a) and b).

– 4 – IEC 61291-5-2:2017 © IEC 2017
The text of this International Standard is based on the following documents:
CDV Report on voting
86C/1376/CDV 86C/1426/RVC
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.
This document has been drafted in accordance with the ISO/IEC Directives, Part 2.
A list of all parts in 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 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.
OPTICAL AMPLIFIERS –
Part 5-2: Qualification specifications – Reliability qualifi
...