SIST EN 62572-3:2016

Fibre optic active components and devices - Reliability standards - Part 3: Laser modules used for telecommunication (IEC 62572-3:2016)

IEC 62572-3:2014 deals with reliability assessment of laser modules used for telecommunication.The aim of this standard is to establish a standard method of assessing the reliability of laser modules in order to minimize risks and to promote product development and reliability; to establish means by which the distribution of failures with time can be determined. This should enable the determination of equipment failure rates for specified end of life criteria. In addition, guidance is given in IEC TR 62572-2. This second edition cancels and replaces the first edition published in 2011. This second edition constitutes a technical revision in which multiple errors in references have been corrected.
Keywords: reliability assessment of laser modules, telecommunication

Aktive Lichtwellenleiterbauelemente und -geräte - Zuverlässigkeitsnormen - Teil 3: Lasermodule für Telekommunikationsanwendungen (IEC 62572-3:2016)

Composants et dispositifs actifs en fibres optiques - Normes de fiabilité - Partie 3: Modules laser utilisés pour les télécommunications (IEC 62572-3:2016)

IEC 62572-3:2016 traite de l’évaluation de la fiabilité des modules laser utilisés pour les télécommunications. La présente norme a pour objet: d'établir une méthode normalisée permettant d'évaluer la fiabilité des modules laser afin de réduire le plus possible les risques et de favoriser le développement et la fiabilité des produits et d'établir des moyens permettant de déterminer la répartition des défaillances au fil du temps. Il convient que ceci permette de déterminer les taux de défaillance d'un matériel pour les critères de fin de vie spécifiés. En outre, un guide est fourni dans l'IEC TR 62572-2. Cette troisième édition annule et remplace la deuxième édition parue en 2014. Cette troisième édition constitue une révision technique, dans laquelle des erreurs dans le Tableau 1 et dans le Tableau 2 ont été corrigées.
Mots clés: modules laser

Aktivne komponente in naprave optičnih vlaken - Standardi zanesljivosti - 3. del: Laserski moduli za telekomunikacije (IEC 62572-3:2016)

Standard IEC 62572-3:2014 obravnava oceno zanesljivosti laserskih modulov za telekomunikacije. Cilj tega standarda je določiti standardno metodo za oceno zanesljivosti laserskih modulov, da se zmanjša tveganje ter spodbuja razvoj in zanesljivost proizvoda, ter poiskati način, na katerega je mogoče določiti razporeditev napak s časom. To naj bi omogočilo ugotavljanje stopenj napak opreme za opredeljena merila v zvezi z življenjsko dobo. Poleg tega so v standardu IEC/TR 62572-2 podana navodila. Druga izdaja razveljavlja in nadomešča prvo izdajo, objavljeno leta 2011. Ta druga izdaja je tehnično popravljena izdaja s popravki več napak v sklicih.
Ključne besede: ocena zanesljivosti laserskih modulov, telekomunikacije

General Information

• Status: Published
• Publication Date: 19-Jun-2016
• ICS: 31.260 - Optoelectronics. Laser equipment
• ICS: 33.180.20 - Fibre optic interconnecting devices
• Technical Committee: MOC - Mobile Communications
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 14-Jun-2016
• Due Date: 19-Aug-2016
• Completion Date: 20-Jun-2016
• Ref Project: EN 62572-3:2016 - Fibre optic active components and devices - Reliability standards - Part 3: Laser modules used for telecommunication

Relations

• Revised: SIST EN 62572-3:2014 - Fibre optic active components and devices - Reliability standards - Part 3: Laser modules used for telecommunication
• Effective Date: 03-Mar-2015
• Replaces: SIST EN 62572-3:2014 - Fibre optic active components and devices - Reliability standards - Part 3: Laser modules used for telecommunication
• Effective Date: 07-Jun-2016

Standards Content (Sample)

SLOVENSKI STANDARD
SIST EN 62572-3:2016
01-september-2016
1DGRPHãþD
SIST EN 62572-3:2014
$NWLYQHNRPSRQHQWHLQQDSUDYHRSWLþQLKYODNHQ6WDQGDUGL]DQHVOMLYRVWLGHO
/DVHUVNLPRGXOL]DWHOHNRPXQLNDFLMH,(&
Fibre optic active components and devices - Reliability standards - Part 3: Laser modules
used for telecommunication (IEC 62572-3:2016)
Aktive Lichtwellenleiterbauelemente und -geräte - Zuverlässigkeitsnormen - Teil 3:
Lasermodule für Telekommunikationsanwendungen (IEC 62572-3:2016)
Composants et dispositifs actifs en fibres optiques - Normes de fiabilité - Partie 3:
Modules laser utilisés pour les télécommunications (IEC 62572-3:2016)
Ta slovenski standard je istoveten z: EN 62572-3:2016
ICS:
31.260 Optoelektronika, laserska Optoelectronics. Laser
oprema equipment
33.180.20 3RYH]RYDOQHQDSUDYH]D Fibre optic interconnecting
RSWLþQDYODNQD devices
SIST EN 62572-3:2016 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST EN 62572-3:2016

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SIST EN 62572-3:2016


EUROPEAN STANDARD EN 62572-3

NORME EUROPÉENNE

EUROPÄISCHE NORM
June 2016
ICS 31.260; 33.180 Supersedes EN 62572-3:2014
English Version
Fibre optic active components and devices - Reliability standards
- Part 3: Laser modules used for telecommunication
(IEC 62572-3:2016)
Composants et dispositifs actifs en fibres optiques - Normes Aktive Lichtwellenleiterbauelemente und -geräte -
de fiabilité - Partie 3: Modules laser utilisés pour les Zuverlässigkeitsnormen - Teil 3: Lasermodule für
télécommunications Telekommunikationsanwendungen
(IEC 62572-3:2016) (IEC 62572-3:2016)
This European Standard was approved by CENELEC on 2016-03-24. 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, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia,
Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, 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: Avenue Marnix 17, B-1000 Brussels
© 2016 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
 Ref. No. EN 62572-3:2016 E

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SIST EN 62572-3:2016
EN 62572-3:2016
European foreword
The text of document 86C/1302/CDV, future edition 3 of IEC 62572-3, 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 62572-3:2016.
The following dates are fixed:
(dop) 2016-12-24
• latest date by which the document has to be implemented at
national level by publication of an identical national
standard or by endorsement
• latest date by which the national standards conflicting with (dow) 2019-03-24
the document have to be withdrawn

This standard supersedes EN 62572-3:2014. It constitutes a technical revision in which errors in Table
1 and Table 2 have been corrected.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CENELEC [and/or CEN] shall not be held responsible for identifying any or all such
patent rights.
Endorsement notice
The text of the International Standard IEC 62572-3:2016 was approved by CENELEC as a European
Standard without any modification.
2

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SIST EN 62572-3:2016
EN 62572-3:2016

Annex ZA
(normative)
Normative references to international publications
with their corresponding European publications
The following documents, in whole or in part, are normatively referenced in this document and are
indispensable for its application. For dated references, only the edition cited applies. For undated
references, the latest edition of the referenced document (including any amendments) applies.
NOTE 1 When 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 60068-2-1 -  Environmental testing -- Part 2-1: Tests - EN 60068-2-1 -
Test A: Cold
IEC 60068-2-14 -  Environmental testing -- Part 2-14: Tests - EN 60068-2-14 -
Test N: Change of temperature
IEC 60749-6 -  Semiconductor devices - Mechanical and EN 60749-6 -
climatic test methods -- Part 6: Storage at
high temperature
IEC 60749-8 -  Semiconductor devices – Mechanical and EN 60749-8 -
climatic test methods – Part 8: Sealing
IEC 60749-10 -  Semiconductor devices - Mechanical and EN 60749-10 -
climatic test methods -- Part 10:
Mechanical shock
IEC 60749-11 -  Semiconductor devices - Mechanical and EN 60749-11 -
climatic test methods -- Part 11: Rapid
change of temperature - Two-fluid-bath
method
IEC 60749-12 -  Semiconductor devices - Mechanical and EN 60749-12 -
climatic test methods -- Part 12: Vibration,
variable frequency
IEC 60749-25 -  Semiconductor devices - Mechanical and EN 60749-25 -
climatic test methods -- Part 25:
Temperature cycling
IEC 60749-26 -  Semiconductor devices - Mechanical and EN 60749-26 -
climatic test methods -- Part 26:
Electrostatic discharge (ESD) sensitivity
testing - Human body model (HBM)
IEC/TR 62572-2 -  Fibre optic active components and devices - -
- Reliability standards - Part 2: Laser
module degradation
MIL-STD-883 -  Test method standard – Microcircuits - -

3

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SIST EN 62572-3:2016

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SIST EN 62572-3:2016



IEC 62572-3

®


Edition 3.0 2016-02




INTERNATIONAL



STANDARD




















Fibre optic active components and devices – Reliability standards –

Part 3: Laser modules used for telecommunication



























INTERNATIONAL

ELECTROTECHNICAL


COMMISSION





ICS 31.260; 33.180 ISBN 978-2-8322-3186-9



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


® Registered trademark of the International Electrotechnical Commission

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SIST EN 62572-3:2016
– 2 – IEC 62572-3:2016 © IEC 2016
CONTENTS
FOREWORD . 3
INTRODUCTION . 5
1 Scope . 6
2 Normative references. 6
3 Terms, definitions, symbols and abbreviations . 7
3.1 Terms and definitions . 7
3.2 Symbols and abbreviations . 8
4 Laser reliability and quality assurance procedure . 8
4.1 Demonstration of product quality . 8
4.2 Testing responsibilities . 9
4.2.1 General . 9
4.2.2 Recommendation applicable to laser customer/system supplier . 9
4.2.3 Recommendation applicable to system operator . 9
4.3 Quality improvement programmes (QIPs) . 9
5 Tests . 9
5.1 General . 9
5.2 Structural similarity . 10
5.3 Burn-in and screening (when applicable in the specification) . 10
6 Activities . 14
6.1 Analysis of reliability results . 14
6.2 Technical visits to LMMs . 14
6.3 Design/process changes . 15
6.4 Deliveries . 15
6.5 Supplier documentation . 15
Annex A (informative) Guidance on testing in Table 1 and Table 2 . 16
A.1 Laser module life tests containing thermoelectric coolers (Table 1, test 1.1) . 16
A.2 Laser module life tests for uncooled modules (Table 1, test 1.2) . 16
A.3 Laser diode life tests on submounts (Table 1, test 1.3) . 17
A.4 Monitor photodiode life tests (Table 1, test 1.4) . 17
A.5 Temperature cycling and thermal shock (Table 1, test 3 and Table 2, test 2) . 18
A.6 Sealing/hermeticity (Table 1, test 4 and Table 2, test 3) . 18
A.7 Shock and vibration (Table 1 , test 5 and Table 2, test 4) . 18
A.8 High-temperature storage (Table 1, test 6 and Table 2, test 5) . 18
A.9 Electrostatic discharge sensitivity (ESD) (Table 1, test 7and Table 2, test 6) . 19
A.10 Residual gas analysis (RGA) (Table 1, test 8 and, Table 2, test 7) . 19
Bibliography . 20

Table 1 – Initial qualification (1 of 3) . 10
Table 2 – Maintenance of qualification (1 of 2) . 13
Table 3 – Performance for laser module reliability parameters . 14
Table A.1 – Recommended life test conditions for laser modules containing Peltier
coolers . 16
Table A.2 – Recommended life test conditions for uncooled laser modules . 17
Table A.3 – Recommended laser diode life test conditions . 17
Table A.4 – Recommended photodiode life test conditions . 18

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SIST EN 62572-3:2016
IEC 62572-3:2016 © IEC 2016 – 3 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________

FIBRE OPTIC ACTIVE COMPONENTS AND DEVICES –
RELIABILITY STANDARDS –

Part 3: Laser modules used for telecommunication

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 62572-3 has been prepared by subcommittee 86C: Fibre optic
systems and active devices of IEC technical committee 86: Fibre optics.
This third edition cancels and replaces the second edition published in 2014. This third edition
constitutes a technical revision in which errors in Table 1 and Table 2 have been corrected.
The text of this standard is based on the following documents:
CDV Report on voting
86C/1302/CDV 86C/1345/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.

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SIST EN 62572-3:2016
– 4 – IEC 62572-3:2016 © IEC 2016
This publication has been drafted in accordance with the ISO/IEC Directives, Part 2.
A list of all parts in the IEC 62572 series, published under the general title Fibre optic active
components and devices – Reliability standards, can be found on the IEC website.
The committee has decided that the contents of this publication will remain unchanged until
the stability date indicated on the IEC website 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.
A bilingual version of this publication may be issued at a later date.

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SIST EN 62572-3:2016
IEC 62572-3:2016 © IEC 2016 – 5 –
INTRODUCTION
The laser modules covered by this International Standard are purchased by system suppliers
(SS) to be inserted in equipment, which in turn are supplied/sold to a system operator (SO) or
a network operator (see definitions in Clause 3).
For the system operator to act as an informed buyer, he/she should have knowledge of the
potential risks posed by the use of critical components.
Optoelectronic component technology is continuing to develop. Consequently, during product
development phases, many failure mechanisms in laser modules have been identified. These
failure mechanisms, if undetected, could result in very short laser lifetime in system use.

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SIST EN 62572-3:2016
– 6 – IEC 62572-3:2016 © IEC 2016
FIBRE OPTIC ACTIVE COMPONENTS AND DEVICES –
RELIABILITY STANDARDS –

Part 3: Laser modules used for telecommunication



1 Scope
This part of IEC 62572 deals with reliability assessment of laser modules used for
telecommunication.
The aim of this standard is
– to establish a standard method of assessing the reliability of laser modules in order to
minimize risks and to promote product development and reliability;
– to establish means by which the distribution of failures with time can be determined. This
should enable the determination of equipment failure rates for specified end of life criteria.
In addition, guidance is given in IEC TR 62572-2.
2 Normative references
The following documents, in whole or in part, are normatively referenced in this document and
are indispensable for its application. For dated references, only the edition cited applies. For
undated references, the latest edition of the referenced document (including any
amendments) applies.
IEC 60068-2-1, Environmental testing – Part 2-1: Tests – Test A: Cold
IEC 60068-2-14, Environmental testing – Part 2-14: Tests – Test N: Change of temperature
IEC 60749-6, Semiconductor devices – Mechanical and climatic test methods – Part 6:
Storage at high temperature
IEC 60749-8, Semiconductor devices – Mechanical and climatic test methods – Part 8:
Sealing
IEC 60749-10, Semiconductor devices – Mechanical and climatic test methods – Part 10:
Mechanical shock
IEC 60749-11, Semiconductor devices – Mechanical and climatic test methods – Part 11:
Rapid change of temperature – Two-fluid-bath method
IEC 60749-12, Semiconductor devices – Mechanical and climatic test methods – Part 12:
Vibration, variable frequency
IEC 60749-25, Semiconductor devices – Mechanical and climatic test methods – Part 25:
Temperature cycling
IEC 60749-26, Semiconductor devices – Mechanical and climatic test methods – Part 26:
Electrostatic discharge (ESD) sensitivity testing – Human body model (HBM)

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SIST EN 62572-3:2016
IEC 62572-3:2016 © IEC 2016 – 7 –
IEC TR 62572-2, Fibre optic active components and devices – Reliability standards – Part 2:
Laser module degradation
MIL-STD-883, Test method standard – Microcircuits
3 Terms, definitions, symbols and abbreviations
3.1 Terms and definitions
For the purposes of this document the following definitions apply.
3.1.1
laser module
packaged assembly containing a laser diode with/without photodiode
Note 1 to entry: The module may also include a cooler and temperature sensor to enable laser temperature to be
controlled and monitored. The optical output is normally via an optical fibre pigtail.
3.1.2
submount
substrate upon which a laser diode or photodiode may be mounted for assembly into the laser
module
Note 1 to entry: Components on submounts are also subject to qualification testing.
3.1.3
laser module manufacturer
LMM
manufacturer of laser modules who provides devices meeting the requirements of the relevant
detail specification (DS) and the customer’s reliability requirements
3.1.4
network operator
NO
organization which operates a telecommunications network
3.1.5
system supplier
SS
manufacturer of telecommunications/data transmission equipment containing optoelectronic
semiconductor lasers
Note 1 to entry: The system supplier can be a laser module customer.
3.1.6
system operator
SO
network operator of telecommunications/data transmission equipment containing opto-
electronic semiconductor lasers in the transmission path
Note 1 to entry: The system may also be part of other more extensive systems, for example telecommunications,
rail, road vehicles, aerospace or weapons.
3.1.7
capability qualifying components
CQC
components selected to represent critical stages of the process and limiting or boundary
characteristics of mechanical and electro-optic design

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SIST EN 62572-3:2016
– 8 – IEC 62572-3:2016 © IEC 2016
Note 1 to entry: Such components should aid the identification of end product failure mechanisms to enable the
determination of activation energies.
3.2 Symbols and abbreviations
T minimum storage temperature
A
T maximum storage temperature
B
T module case temperature
c
T submount temperature
s
T recommended submount temperature
s nom
T module minimum operating temperature
op min
T module maximum operating temperature
op max
T module minimum storage temperature
stg min
T module maximum storage temperature

stg max
Qc test for gross leak detection
Qk  test for fine leak detection
p periodicity (in months)
n sample size
CA capability approval
CQC capability qualifying components
DS detail specification
LMM laser module manufacturer
ML median life
NO network operator
QA quality approval
QIP quality improvement programmes
RGA residual gas analysis
SO system operator
SS system supplier
4 Laser reliability and quality assurance procedure
4.1 Demonstration of product quality
This standard (where required by the specification) gives the minimum mandatory
requirements and is part of a total laser reliability and quality assurance procedure adopted
by the laser module manufacturer.
It also provides guidance on the activities of system suppliers and system operators and
provides feedback on field performance to laser module manufacturers and system suppliers.
The laser module manufacturer shall be capable of demonstrating, by means of qualification
approval of devices, technology approval or capability approval of the manufacturing process,
the following:
a) a documented and audited manufacturing process including the qualification of purchased
components in accordance with an internationally recognized quality management system;
b) a performance qualification programme, including for example, accelerated life testing,
burn-in and screening of components and modules;
c) a qualification maintenance programme to ensure continuity of reliability performance;

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SIST EN 62572-3:2016
IEC 62572-3:2016 © IEC 2016 – 9 –
d) a procedure to provide feedback on reliability issues to development and production.
4.2 Testing responsibilities
4.2.1 General
The testing detailed in Table 1 and Table 2 is to be performed by the laser module
manufacturer and component suppliers (where applicable). Additional testing may be
specified in the specification.
4.2.2 Recommendation applicable to laser customer/system supplier
The system supplier is recommended to have a programme to analyse and verify the results
including failure analysis. This programme includes an independent life test of fully packaged
laser modules (see Table 2, test 1 and/or test 2 and 3 and/or test 5 (sample size >10 per
test)).
4.2.3 Recommendation applicable to system operator
The system operator is recommended to have a programme to monitor and report field failure
rates in sufficient detail to enable the system supplier and laser module manufacturer to
initiate any necessary corrective actions at an early stage in the lifetime of a product.
Suppliers may have different approaches (i.e. to reliability concepts) during the development
of product maturity, and resource limitations may dictate testing strategies.
Alternative tests and activities to those specified are permitted, provided the LMM/SS/SO can
show intent to remove end-product failures and the associated failure mechanisms. However,
this will require significant data to substantiate compliance.
4.3 Quality improvement programmes (QIPs)
Quality improvement programmes (QIPs) shall be initiated with component suppliers and
customers (SOs, SSs and LMMs) to address non-compliances (including quality and reliability
problems identified during subsequent service life of the laser). The correction of non-
compliances and subsequent QIPs are a required strategy to minimize reliability risks. The
operation of QIPs should be stated in the quality approval (QA) generic and capability
approval documents.
5 Tests
5.1 General
The tests described in Table 1 and Table 2 are designed to accelerate the main failure
mechanisms known to be reliability hazards in laser modules and shall follow the guidance
from IEC TR 62572-2. Where appropriate, the CQC shall demonstrate an ability to reduce end
product failure mechanisms. Final product validation is required to demonstrate that CQCs are
operating at the boundaries of the process or technology. These tests will reduce the risk of
unreliable components entering system use and will enable estimates to be made of the
distribution of laser lifetimes and hence the laser failure rates.
The sample size and level of testing may vary depending on the business volume between the
laser customer/system supplier (SS) and laser module manufacturer (LMM). This information
will be given in the capability approval (CA) document and the specification where appropriate.
It is essential that the lasers evaluated are entirely representative of standard production
devices and have passed all the production and/or specified (where applicable in the
specification) burn-in and screening procedures.

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SIST EN 62572-3:2016
– 10 – IEC 62572-3:2016 © IEC 2016
Table 1 – Initial qualification
These tests will normally be performed by the laser manufacturer as part of an initial
qualification programme.
Table 2 – Maintenance of qualification
These tests cover periodic monitoring performed on production devices to ensure that the
quality and reliability performance established during initial qualification is maintained or
improved.
5.2 Structural similarity
Where a range of laser modules is produced by a laser manufacturer, there may be some
significant structural similarity between different type codes. A combination of results from
different test programmes, where appropriate, is therefore permitted.
Consideration should be given to the fact that minor differences in technology or processing
can have a major impact on reliability, whilst not being apparent during quality assessment.
Evidence shall be presented which demonstrates that all results are directly relevant.
5.3 Burn-in and screening (when applicable in the specification)
NOTE See IEC TR 62572-2.
The screening test should be designed by the laser module manufacturer specifically for his
particular technology. Any approach based on similarity to that which is performed by other
manufacturers is good for comparison purposes, but can be ineffective in achieving the actual
screening goal. This is particularly true for fibre optic components whose technology is not yet
mature and varies significantly from supplier to supplier.
Where a manufacturer can demonstrate component and process stability, screening
procedures may be revised.
Table 1 – Initial qualification (1 of 3)
Test
Test References Conditions n
no.
1 Initial endurance test
1.1 a) Module with 25
Φ specified, constant power
e
thermoelectric cooler
Temperature: T = T

c op max
T = T

s s nom

a
Duration: 5 000 h
1.2 b) Module without 25
Φ specified, constant power
e
thermoelectric cooler
Temperature: T = T
c op max

a
Duration: 5 000 h
1.3 Laser diode (submount) Temperature: at least two
test temperatures:
...