IEC TR 62343-6-6:2017
(Main)Dynamic modules - Part 6-6: Design guide - Failure mode effect analysis for optical units of dynamic modules
Dynamic modules - Part 6-6: Design guide - Failure mode effect analysis for optical units of dynamic modules
IEC TR 62343-6-6:2017(E) which is a Technical Report, describes failure mode effect analysis (FMEA) for optical units of dynamic modules. FMEA is one of the effective and useful analysis methods to determine the reliability evaluation test items and conditions that are defined in future reliability qualification documents. In order to estimate the lifetime for a module, there is a typical procedure. The first step is to identify the dominant failure modes. The second step is to determine the acceleration tests according to these failure modes. The third step is to carry out the test. The fourth step is to estimate the acceleration factors. Finally, the fifth step is to calculate the lifetime of the dynamic module. IEC 61300-2 (all parts) defines environment and mechanical tests. This Technical Report describes the dominant failure mode for dynamic modules and relevant tests from IEC 613002 (all parts). This second edition cancels and replaces the first edition published in 2011. It constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition:
- addition of the LCOS based and the DLP based wavelength selective switch (WSS);
- addition of the multicast optical switch module (MCOS).
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IEC TR 62343-6-6 ®
Edition 2.0 2017-01
TECHNICAL
REPORT
Dynamic modules –
Part 6-6: Design guide – Failure mode effect analysis for optical units of dynamic
modules
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IEC TR 62343-6-6 ®
Edition 2.0 2017-01
TECHNICAL
REPORT
Dynamic modules –
Part 6-6: Design guide – Failure mode effect analysis for optical units of dynamic
modules
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 33.180.20 ISBN 978-2-8322-3719-9
– 2 – IEC TR 62343-6-6:2017 © IEC 2017
CONTENTS
FOREWORD . 3
1 Scope . 5
2 Normative references . 5
3 Terms and definitions . 6
4 Consideration of types of dynamic modules . 6
5 Typical failure points. 6
6 Failure modes and known failure mechanisms . 7
Bibliography . 29
Table 1 – Categorization based on the structure and mode of evaluation .7
Table 2 – Failure mode and known failure mechanisms for the optical units of dynamic
devices .8
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
DYNAMIC MODULES –
Part 6-6: Design guide – Failure mode effect analysis
for optical units of dynamic modules
FOREWORD
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The main task of IEC technical committees is to prepare International Standards. However, a
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data of a different kind from that which is normally published as an International Standard, for
example "state of the art".
IEC 62343-6-6, which is a Technical Report, 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 2011. It constitutes a
technical revision.
This edition includes the following significant technical changes with respect to the previous
edition:
a) addition of the LCOS based and the DLP based wavelength selective switch (WSS);
– 4 – IEC TR 62343-6-6:2017 © IEC 2017
b) addition of the multicast optical switch module (MCOS).
The text of this technical report is based on the following documents:
DTR Report on voting
86C/1396/DTR 86C/1421/RVC
Full information on the voting for the approval of this technical report can be found in the
report on voting indicated in the above table.
This publication has been drafted in accordance with the ISO/IEC Directives, Part 2.
A list of all parts in the IEC 62343 series, published under the general title Dynamic modules,
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 web site under "http://webstore.iec.ch" in the data
related to the specific publication. At this date, the publication will be
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.
A bilingual version of this publication may be issued at a later date.
DYNAMIC MODULES –
Part 6-6: Design guide – Failure mode effect analysis
for optical units of dynamic modules
1 Scope
This part of IEC 62343, which is a Technical Report, describes failure mode effect analysis
(FMEA) for optical units of dynamic modules. FMEA is one of the effective and useful analysis
methods to determine the reliability evaluation test items and conditions that are defined in
future reliability qualification documents.
In order to estimate the lifetime for a module, there is a typical procedure. The first step is to
identify the dominant failure modes. The second step is to determine the acceleration tests
according to these failure modes. The third step is to carry out the test. The fourth step is to
estimate the acceleration factors. Finally, the fifth step is to calculate the lifetime of the
dynamic module.
IEC 61300-2 (all parts) defines environment and mechanical tests. This Technical Report
describes the dominant failure mode for dynamic modules and relevant tests from
IEC 61300-2 (all parts).
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 61300-2-1, Fibre optic interconnecting devices and passive components – Basic test and
measurement procedures – Part 2-1: Tests – Vibration (sinusoidal)
IEC 61300-2-4, Fibre optic interconnecting devices and passive components – Basic test and
measurement procedures – Part 2-4: Tests – Fibre/cable retention
IEC 61300-2-9, Fibre optic interconnecting devices and passive components – Basic test and
measurement procedures – Part 2-9: Tests – Shock
IEC 61300-2-17, Fibre optic interconnecting devices and passive components – Basic test
and measurement procedures – Part 2-17: Tests – Cold
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
– 6 – IEC TR 62343-6-6:2017 © IEC 2017
IEC 61300-2-44, Fibre optic interconnecting devices and passive components – Basic test
and measurement procedures – Part 2-44: Tests – Flexing of the strain relief of fibre optic
devices
3 Terms and definitions
No terms and definitions are listed in this document.
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
4 Consideration of types of dynamic modules
There are many types of dynamic modules: dynamic channel equalizer, tuneable optical
chromatic dispersion compensator, dynamic gain tilt equalizer, wavelength selective switch,
wavelength blocker, optical performance monitor, optical switch, and so on. The main feature
of dynamic modules is to control their performances during operation. In order to achieve their
features, many kinds of control mechanisms are used for dynamic modules; micro electro
mechanical system (MEMS), stepping motor, electromagnet, thermo optics, magnet optics,
electro optics, liquid crystal device (LCD), and so on.
Table 1 shows the first guidance of categorization of dynamic modules and their mode of
evaluation. Dynamic modules without an electrical circuit board can be considered similar to
passive optical components for purposes of evaluation. On the other hand, for dynamic
modules with a control circuit board, it is necessary to give special consideration. There are
mainly two types of internal design for dynamic modules: those for which it is easy to divide
the constituting parts to consider the reliability, and those for which it is not easy to divide. It
is necessary to consider how to evaluate according to these structures.
This document describes FMEA only for optical units for dynamic modules. It is necessary to
evaluate who
...
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