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

EN following parallel vote

Lichtwellenleiter-Verstärker -- Teil 5-2: Anerkennungsspezifikation - Zuverlässigkeitsanerkennung

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

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.

Optični ojačevalci – 5-2. del: Kvalifikacijske specifikacije; Kvalifikacije zanesljivosti za ojačevalnike optičnih vlaken (IEC 61291-5-2:2002)*

General Information

Status
Withdrawn
Publication Date
31-Aug-2004
Withdrawal Date
16-Jun-2020
Technical Committee
Current Stage
9900 - Withdrawal (Adopted Project)
Start Date
17-Jun-2020
Due Date
10-Jul-2020
Completion Date
17-Jun-2020

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SLOVENSKI SIST EN 61291-5-2:2004
STANDARD
september 2004
Optični ojačevalci – 5-2. del: Kvalifikacijske specifikacije; Kvalifikacije
zanesljivosti za ojačevalnike optičnih vlaken (IEC 61291-5-2:2002)*

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

optical fibre amplifiers (IEC 61291-5-2:2002)
ICS 33.180.30 Referenčna številka
SIST EN 61291-5-2:2004(en)

© Standard je založil in izdal Slovenski inštitut za standardizacijo. Razmnoževanje ali kopiranje celote ali delov tega dokumenta ni dovoljeno

---------------------- Page: 1 ----------------------
EUROPEAN STANDARD EN 61291-5-2
NORME EUROPÉENNE
EUROPÄISCHE NORM December 2002
ICS 33.180.30
English version
Optical amplifiers
Part 5-2: Qualification specifications -
Reliability qualification for optical fibre amplifiers
(IEC 61291-5-2:2002)
Amplificateurs optiques Lichtwellenleiter-Verstärker

Partie 5-2: Spécifications de qualification - Teil 5-2: Anerkennungsspezifikation -

Qualification de fiabilité pour Zuverlässigkeitsanerkennung
amplificateurs à fibres optiques (IEC 61291-5-2:2002)
(CEI 61291-5-2:2002)

This European Standard was approved by CENELEC on 2002-11-01. 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, Czech Republic,

Denmark, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Luxembourg, Malta,

Netherlands, Norway, Portugal, Slovakia, 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

© 2002 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.

Ref. No. EN 61291-5-2:2002 E
---------------------- Page: 2 ----------------------
EN 61291-5-2:2002 - 2 -
Foreword

The text of document 86C/434/FDIS, future edition 1 of IEC 61291-5-2, 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 61291-5-2 on 2002-11-01.
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) 2003-08-01
– latest date by which the national standards conflicting
with the EN have to be withdrawn (dow) 2005-11-01
Annexes designated "normative" are part of the body of the standard.
Annexes designated "informative" are given for information only.
In this standard, annexes A, B and ZA are normative and annex C is informative.
Annex ZA has been added by CENELEC.
__________
Endorsement notice

The text of the International Standard IEC 61291-5-2:2002 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:
ISO 9001 NOTE Harmonized as EN ISO 9001:2000 (not modified).
ISO 9004 NOTE Harmonized as EN ISO 9004:2000 (not modified).
__________
---------------------- Page: 3 ----------------------
- 3 - EN 61291-5-2:2002
Annex ZA
(normative)
Normative references to international publications
with their corresponding European publications

This European Standard incorporates by dated or undated reference, provisions from other

publications. These normative references are cited at the appropriate places in the text and the

publications are listed hereafter. For dated references, subsequent amendments to or revisions of any

of these publications apply to this European Standard only when incorporated in it by amendment or

revision. For undated references the latest edition of the publication referred to applies (including

amendments).

NOTE When an international publication has been modified by common modifications, indicated by (mod), the relevant

EN/HD applies.
Publication Year Title EN/HD Year
1) 2)
IEC 60068-2-1 - Environmental testing EN 60068-2-1 1993
Part 2: Tests - Tests A: Cold
1) 2)
IEC 60068-2-2 - Part 2: Tests - Test B: Dry heat EN 60068-2-2 1993
1) 2)
IEC 60068-2-3 - Part 2: Tests - Test Ca: Damp heat, HD 323.2.3 S2 1987
steady state
1) 2)
IEC 60068-2-6 - Part 2: Tests - Test Fc: Vibration EN 60068-2-6 1995
(sinusoidal)
1) 2)
IEC 60068-2-14 - Part 2: Tests - Test N: Change of EN 60068-2-14 1999
temperature
1) 2)
IEC 60068-2-21 - Part 2-21: Tests - Test U: Robustness of EN 60068-2-21 1999
terminations and integral mounting
devices
1) 2)
IEC 60068-2-27 - Part 2: Tests - Test Ea and guidance: EN 60068-2-27 1993
Shock
1) 2)
IEC 60068-2-32 - Part 2: Tests - Test Ed: Free fall EN 60068-2-32 1993
1) 2)
IEC 60068-2-56 - Part 2: Tests - Test Cb: Damp heat, HD 323.2.56 S1 1990
steady state, primarily for equipment
1) 2)
IEC 61300-2-1 - Fibre optic interconnecting devices and EN 61300-2-1 1997
passive components - Basic test and
measurement procedures
Part 2-1: Tests - Vibration (sinusoidal)
1) 2)
IEC 61300-2-2 - Part 2-2: Tests - Mating durability EN 61300-2-2 1997
1) 2)
IEC 61300-2-4 - Part 2-4: Tests - Fibre/cable retention EN 61300-2-4 1997
Undated reference.
Valid edition at date of issue.
---------------------- Page: 4 ----------------------
EN 61291-5-2:2002 - 4 -
Publication Year Title EN/HD Year
1) 2)
IEC 61300-2-5 - Part 2-5: Tests - Torsion/twist EN 61300-2-5 1997
1) 2)
IEC 61300-2-9 - Part 2-9: Tests - Shock EN 61300-2-9 1997
1) 2)
IEC 61300-2-18 - Part 2-18: Tests - Dry heat - High EN 61300-2-18 1997
temperature endurance
1) 2)
IEC 61300-2-19 - Part 2-19: Tests - Damp heat (steady EN 61300-2-19 1997
state)
1) 2)
IEC 61300-2-22 - Part 2-22: Tests - Change of EN 61300-2-22 1997
temperature
1) 2)
IEC 61300-2-42 - Part 2-42: Tests - Static side load for EN 61300-2-42 1998
connectors
1) 2)
IEC 61291-1 - Optical fibre amplifiers EN 61291-1 1998
Part 1: Generic specification
1) 2)
IEC 61751 - Laser modules used for EN 61751 1998
telecommunication - Reliability
assessment
1) 2)
ISO 9000 - Quality management systems EN ISO 9000 2000
Fundamentals and vocabulary
---------------------- Page: 5 ----------------------
NORME CEI
INTERNATIONALE IEC
61291-5-2
INTERNATIONAL
Première édition
STANDARD
First edition
2002-08
Amplificateurs optiques –
Partie 5-2:
Spécifications de qualification –
Qualification de fiabilité pour amplificateurs
à fibres optiques
Optical amplifiers –
Part 5-2:
Qualification specifications –
Reliability qualification for optical
fibre amplifiers
 IEC 2002 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.

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Telephone: +41 22 919 02 11 Telefax: +41 22 919 03 00 E-mail: inmail@iec.ch Web: www.iec.ch

CODE PRIX
Commission Electrotechnique Internationale PRICE CODE
International Electrotechnical Commission
Международная Электротехническая Комиссия
Pour prix, voir catalogue en vigueur
For price, see current catalogue
---------------------- Page: 6 ----------------------
61291-5-2 © IEC:2002 – 3 –
CONTENTS

FOREWORD .......................................................................................................................... 5

INTRODUCTION ....................................................................................................................7

1 Scope and object ............................................................................................................. 9

2 Normative references....................................................................................................... 9

3 Terms and definitions .....................................................................................................13

4 Reliability requirements ..................................................................................................15

4.1 Demonstration of product quality ...........................................................................15

4.2 Testing responsibilities ..........................................................................................15

4.2.1 General......................................................................................................15

4.2.2 Recommendation applicable to OFA customer (SS) ...................................15

4.2.3 Recommendation applicable to SO ............................................................15

4.3 Quality improvement programmes (QIPs)...............................................................17

4.4 Tests .....................................................................................................................17

4.4.1 General......................................................................................................17

4.4.2 Reliability qualification of components .......................................................19

4.4.3 Reliability qualification of the OFA assembly process.................................19

4.4.4 Reliability qualification of the OFA device or sub-system ...........................21

4.4.5 Structural similarity ....................................................................................25

4.5 Procedures ............................................................................................................25

4.5.1 Analysis of reliability results.......................................................................25

4.5.2 Reliability calculations ...............................................................................25

4.5.3 Audits/technical visits to OFA manufacturers (FFS) ...................................27

4.5.4 Design/process changes ............................................................................27

4.5.5 Delivery (FFS) ...........................................................................................29

4.5.6 Supplier documentation (FFS)....................................................................29

5 Guidance ........................................................................................................................29

5.1 Guidance on failure rate calculations .....................................................................29

5.2 OFA failure mechanisms........................................................................................29

Annex A (normative) Procedures for reliability testing of OFA components...........................31

Annex B (normative) Reliability test methods .......................................................................41

Annex C (informative) List of abbreviations ..........................................................................45

Bibliography..........................................................................................................................47

---------------------- Page: 7 ----------------------
61291-5-2 © IEC:2002 – 5 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
OPTICAL AMPLIFIERS –
Part 5-2: Qualification specifications –
Reliability qualification for optical fibre amplifiers
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. 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) The documents produced have the form of recommendations for international use and are published in the form

of standards, technical specifications, technical reports or guides and they are accepted by the National

Committees in that sense.

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) Attention is drawn to the possibility that some of the elements of this International Standard may be the subject

of patent rights. The 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.
The text of this standard is based on the following documents:
FDIS Report on voting
86C/434/FDIS 86C/462/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 3.

Annexes A and B form an integral part of this standard.
Annex C is for information only.

The committee has decided that the contents of this publication will remain unchanged

until 2006. At this date, the publication will be
• reconfirmed;
• withdrawn;
• replaced by a revised edition, or
• amended.
---------------------- Page: 8 ----------------------
61291-5-2 © IEC:2002 – 7 –
INTRODUCTION

This International Standard is dedicated to the subject of reliability qualification of optical

amplifiers. Since the technology is quite new and still evolving, amendments and new editions

to this document can be expected.

Each abbreviation introduced in this International Standard is explained in the text, at least

the first time it appears. However, for an easier understanding of the whole text, a list of all

abbreviations used in this International Standard is given in annex C.
---------------------- Page: 9 ----------------------
61291-5-2 © IEC:2002 – 9 –
OPTICAL AMPLIFIERS –
Part 5-2: Qualification specifications –
Reliability qualification for optical fibre amplifiers
1 Scope and object

This International Standard 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 IEC standard. 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 standard gives requirements

for the evaluation of OA reliability by combining the reliability of such internal black boxes.

The objects of this International Standard are the following:
• to specify the requirements for the reliability assessment of OFAs;

• to provide assistance to the purchaser in the selection of consistently high quality OA

products for his particular applications;

• to give the minimum list of reliability qualification tests, requirements on failure criteria

during testing and on reliability predictions, and give the relevant normative references.

In particular, this International Standard is intended:

• 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;

• to establish means to determine the distribution of failures in time in order to enable the

determination of equipment failure rates for specified end-of-life criteria.
In addition, guidance is given on:

• the controls a customer should make, prior to procurement of an OFA, on the test

procedures an OFA manufacturer has in place in order to guarantee product reliability;

• the procedures to verify the reliability claims of an OFA manufacturer.
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 60068-2-1, Environmental testing – Part 2: Tests. Tests A: Cold
IEC 60068-2-2, Environmental testing – Part 2: Tests. Tests B: Dry heat

IEC 60068-2-3, Environmental testing – Part 2: Tests. Test Ca: Damp heat, steady state

---------------------- Page: 10 ----------------------
61291-5-2 © IEC:2002 – 11 –

IEC 60068-2-6, Environmental testing – Part 2: Tests – Test Fc: Vibration (sinusoidal)

IEC 60068-2-14, Environmental testing – Part 2: 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: Tests. Test Ea and guidance: Shock

IEC 60068-2-32, Environmental testing. Part 2: Tests. Test Ed: Free fall (Procedure 1)

IEC 60068-2-56, Environmental testing – Part 2: Tests. Test Cb: Damp heat, steady state,

primarily for equipment

IEC 61300-2-1, Fibre optic interconnecting devices and passive components – Basic test and

measurement procedures – Part 2-1: Tests – Vibration (sinusoidal)

IEC 61300-2-2, Fibre optic interconnecting devices and passive components – Basic test

and measurement procedures – Part 2-2: Tests – Mating durability

IEC 61300-2-4, Fibre optic interconnecting devices and passive components – Basic test and

measurement procedures – Part 2-4: Tests – Fibre/cable retention

IEC 61300-2-5, Fibre optic interconnecting devices and passive components – Basic test

and measurement procedures – Part 2-5: Tests – Torsion/twist

IEC 61300-2-9, Fibre optic interconnecting devices and passive components – Basic test and

measurement procedures – Part 2-9: Tests – Shock

IEC 61300-2-18, Fibre optic interconnecting devices and passive components – Basic test

and measurement procedures – Part 2-18: Tests – Dry heat – High temperature endurance

IEC 61300-2-19, Fibre optic interconnecting devices and passive components – Basic test

and measurement procedures – Part 2-19: Tests – Damp heat (steady state)

IEC 61300-2-22, Fibre optic interconnecting devices and passive components – Basic test and

measurement procedures – Part 2-22: Tests – Change of temperature

IEC 61300-2-42, Fibre optic interconnecting devices and passive components – Basic test

and measurement procedures – Part 2-42: Tests – Static side load for connectors
IEC 61291-1, Optical fibre amplifiers – Part 1: Generic specification
IEC 61751, Laser modules used for telecommunication – Reliability assessment
ISO 9000, Quality management systems – Fundamentals and vocabulary
---------------------- Page: 11 ----------------------
61291-5-2 © IEC:2002 – 13 –
3 Terms and definitions

For the purposes of this part of IEC 61291, the definitions given in IEC 61291-1 and the

following apply.

NOTE For ease of reference the definition of OA reliability given in IEC 61291-1 is reported below (definition 3.7).

3.1
failure

non-compliance to product specification or change in parameters as agreed by the customer

and supplier
3.2
OFA manufacturer (OFAM)

manufacturer who provides OFA devices or subsystems meeting the requirements of the

applicable detail specification (DS)
3.3
system supplier (SS)

manufacturer of fibre-optic telecommunication equipment containing OFAs (that is, the OFA

customer)
3.4
system operator (SO)

telecommunication operator using fibre-optic systems with OFAs in the transmissions path

3.5
component supplier (CS)
manufacturer providing the OFAM with components meeting the requirements of the
applicable detail specification (DS)
3.6
capability qualifying component (CQC)

components or sub-assemblies representing critical stages of the manufacturing process and

limiting the characteristics of mechanical and electro-optic design

NOTE Such components or sub-assemblies enable the determination of activation energies and help in the

identification of final product failure mechanisms.
3.7
reliability

a) minimum period of OA continuous operation without any faults at specified operating and

environmental conditions;

b) probability of faults per year at specified operating and environmental conditions

NOTE The reliability of an OA is expressed by either of the following two parameters: mean time before failure

(MTBF) and failure in time (FIT):

The MTBF is the mean period of OFA continuous operation without any failure at specified operating and

environmental conditions.

The FIT is the number of failures expected in 10 hours at specified operating and environmental conditions.

---------------------- Page: 12 ----------------------
61291-5-2 © IEC:2002 – 15 –
4 Reliability requirements
4.1 Demonstration of product quality

This International Standard (where required by the DS) gives the minimum mandatory

requirements to assess reliability of an OFA device or subsystem and is intended to be part of

a total OFA reliability qualification and quality assurance procedure adopted by:

• the OFAM.

Moreover, it gives guidance on the quality assurance procedures to be adopted by:

• the SS,
• the SO,

and on the feedback of field performance to be provided (as indicated in the DS) by the SO to

the OFAM and to the SS.
The OFAM shall be able to demonstrate:

• a documented and audited manufacturing process, including the reliability qualification of

purchased components, in accordance with ISO 9000;

• a performance qualification programme, including, for example, accelerated life testing,

burn-in and screening of components and OFA devices and subsystems;

• a reliability qualification maintenance programme to ensure continuity of reliability

performance;
• a procedure to ensure an appropriate feedback to development and production on
reliability issues.

This can be achieved by means of reliability qualification approval of products, technology

approval (TA) or capability approval (CA) of the manufacturing process.

NOTE A comprehensive reliability assurance programme is usually more complex and goes beyond the scope of

this International Standard (see for example clause 5 and the ISO 9000 family of standards ).

4.2 Testing responsibilities
4.2.1 General
The OFAM is responsible for reliability testing.

The testing detailed in tables 1 to 4 is to be performed by either the OFAM or component

suppliers (CSs). Additional testing may be specified in the DS.
4.2.2 Recommendation applicable to OFA customer (SS)

The SS is recommended to have a process to analyze and verify the results including failure

analysis. This includes an independent test procedure of OFA devices and subsystems.

___________
ISO 9000, ISO 9001, ISO 9004 and supplementary guideline standards.
---------------------- Page: 13 ----------------------
61291-5-2 © IEC:2002 – 17 –
4.2.3 Recommendation applicable to SO

The SO is recommended to have a process to monitor and report field failure rates in

sufficient detail to enable SS and OFAM to initiate any necessary corrective actions at an

early stage in the lifetime of a product.

NOTE 1 Suppliers may have different approaches (to reliability qualification concepts) as the maturity of the

product is developing, and resource limitations may dictate testing strategies.

NOTE 2 Tests and procedures alternative to those specified are permitted, provided the OFAM/SS/SO can show

intent to remove end-product failure and the associated failure mechanisms. However, this requires significant

data to substantiate compliance and demonstrate equivalence with tests and procedures herewith described.

4.3 Quality improvement programmes (QIPs)

Quality improvement programmes (QIPs) shall be initiated with component suppliers and

customers, that is SO, SS, OFAM, to address non-compliances (including quality and

reliability problems identified during subsequent service life of the optical amplifier). The

correction of non-compliances and subsequent QIP are a required strategy to minimize

reliability risks. The operation of QIPs should be stated in the QA (quality approval) generic

and capability approval documents.
4.4 Tests
4.4.1 General

An OFA device or sub-system is an assembly of various parts and components of different

nature. A main point in the reliability of the OFA device or sub-system is to ensure the

reliability of each part and basic manufacturing process used. For the purpose of this

International Standard, each internal part shall be seen as a black box.

This International Standard is based on the assumption that the reliability of an OA can be

evaluated with sufficient confidence from the FIT rates of its internal black boxes when the

assembly process of the constituents has been qualified.
The procedures to qualify the assembly process are described in 4.4.3.

The reliability assurance is confirmed by the test procedure described in 4.4.4 carried out on

the OFA device or sub-system as a whole.

The basic parts usually constituting an OFA (internal black boxes) are listed below:

• Passive optical components
• Opto-electronic components
• Doped fibres or doped fibre modules
• Optical connectors
• Electronics
• Others (to be specified)

The OFAM shall declare the number and type of the internal black boxes constituting the OFA

and give the failure rates (in failure in time (FIT)) for each of them.

The OFA failure rate shall be calculated by suitably combining the FIT-rates of its internal

parts, as described in 4.5.2.
---------------------- Page: 14 ----------------------
61291-5-2 © IEC:2002 – 19 –
4.4.2 Reliability qualification of components

Tables 1 and 2 give the minimum list of tests to be performed on the various parts con-

stituting the OFA in order to guarantee the claimed reliability level. Normative references for

tests and test conditions are given in annex A.
Table 1 – Minimum test list for passive optical components, pump laser modules,
monitor diode modules and optical connectors
Passive optical Pump laser Monitor diode Optical
Test
components modules modules connectors
Temperature storage (high/low) X X X X
Temperature cycling X X X X
Damp heat X (X) (X) X
Shock X X X
Vibration X X X
Fibre pull X X X X
Side pull X X X X
Optical high power test X
Electrical endurance test X
High temperature reverse bias
(HTRB)
Mating X
Hermeticity/RGA X X
ESD X X
Table 2 – Minimum test list for doped fibre
Test
Proof test
Hydrogen aging
Fiber coating strip force (for non-hermetic fiber
only)

A set of test conditions suitable to the test lists in tables 1 and 2 to assess the reliability of

OFA components (seen as black boxes) is given for reference in annex A. These test con-

ditions specify the common practice in the OFA manufacturing industry.
4.4.3 Reliability qualification of the OFA assembly process

Fibre arrangement and assembly of the optical and electrical components are very important

aspects for assessing the reliability of an OFA. In particular, the fibre splice process is the

most critical step in the OFA assembly process.

The splice process shall be qualified according to the relevant fibre/coating material.

Table 3 indicates the tests required on splices.
---------------------- Page: 15 ----------------------
61291-5-2 © IEC:2002 – 21 –
Table 3 – Tests required for splices
Tests Conditions IEC reference
+85 °C
High temperature storage
2 000 h
–40 °C /+85 °C
Change of temperature 2 °C/min
IEC 60068-2-14
(Thermal cycling) Q = 100 cycles
I = 500 cycles
Damp heat 40 °C 93 % RH 500 h IEC 60068-2-56
100 G
Shock 6 ms IEC 60068-2-27
6 times/axis
10 Hz to 2 000 Hz
Vibrations 10 G 5 cycles/axis IEC 60068-2-6
15 min/cycle
Robustness test 5 N
IEC 60068-2-21
(Pull test) 10 s
NOTE G is the standard value of gravity acceleration (9,80665 m/s ).
The number of sa
...

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