IEC TR 62627-03-03:2013

IEC/TR 62627-03-03 ®
Edition 1.0 2013-05
TECHNICAL
REPORT
colour
inside
Fibre optic interconecting devices and passive components –
Part 03-03: Reliability – Report on high-power reliability for metal-doped optical
fibre plug-style optical attenuators

IEC/TR 62627-03-03:2013(E)
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IEC/TR 62627-03-03 ®
Edition 1.0 2013-05
TECHNICAL
REPORT
colour
inside
Fibre optic interconecting devices and passive components –

Part 03-03: Reliability – Report on high-power reliability for metal-doped optical

fibre plug-style optical attenuators

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
PRICE CODE
S
ICS 33.180.20 ISBN 978-2-83220-762-8

– 2 – TR 62627-03-03  IEC:2013(E)
CONTENTS
FOREWORD . 4
INTRODUCTION . 6
1 Scope . 7
2 Normative references . 7
3 Outline of high-power test for optical attenuators in IEC/TR 62627-03-02 . 7
4 Accuracy of the internal temperature estimated by the thermal simulation . 8
5 Return loss decreasing test for plug-style optical attenuators . 10
5.1 Test samples . 10
5.2 Test set-up and test conditions . 11
5.3 Test results and the analysis . 12
5.3.1 The degradation on high-power condition . 12
5.3.2 The result of permanent fibre withdrawals before and after the test . 13
5.3.3 Stabilization time of return loss decreasing . 15
5.3.4 Relation of optical input power, test temperature and stabilized return
loss . 15
6 Mechanism of fibre withdrawal on high-power condition . 17
6.1 Estimate of the mechanism of fibre withdrawal . 17
6.2 Fibre withdrawal after application of high-power test three times . 18
7 Long-term reliability test . 19
7.1 Test conditions . 19
7.2 Test results . 20
7.2.1 Return loss changing during the test . 20
7.2.2 The performance deviation after the test . 20
7.3 Analysis of long-term, high-power reliability test . 20
8 Conclusion . 20
Bibliography . 22

Figure 1 – Split-sleeve surface temperature measurement system on high-power input
condition for the SC plug style attenuators by Yamaguchi et al. . 8
Figure 2 – Split sleeve out-surface temperature measurement results on high-power
input condition for the SC plug style attenuators by Yamaguchi et al. . 9
Figure 3 – Input-power dependency of split sleeve outer surface temperature of the SC
plug style optical attenuator without housing . 10
Figure 4 – Sample of design – Worst-case endface conditions . 11
Figure 5 – Test set-up of return loss monitor at high-power input into the optical
attenuator . 11
Figure 6 – High-power input test results of optical attenuator . 12
Figure 7 – Result of high-power input test of the optical attenuator . 12
Figure 8 – Relationship between the gap and the return loss . 13
Figure 9 – Distribution diagram of the optical fibre withdrawal of both the optical
attenuator and the optical connector . 14
Figure 10 – Temperature distribution along the central axis derived from thermal
simulation (10 dB optical attenuator) . 14
Figure 11 – Time dependence of the maximum temperature in thermal simulation of the
optical attenuator . 15

TR 62627-03-03  IEC:2013(E) – 3 –
Figure 12 – Return loss decreasing curve in the tests with various test temperatures
and input powers (sample no. ATT44/JC35) . 16
Figure 13 – Relationship between the maximum internal temperature and return loss
stabilization point of the sample tested with various test temperatures and input
powers (sample no. ATT44/JC35) . 16
Figure 14 – Relationship between the maximum internal temperature and the gap at
stabilization of return loss of the sample tested with various test temperature and input
powers (sample no. ATT44/JC35) . 17
Figure 15 – Thermal stress simulation model for three layers of zirconia, epoxy and
silica . 17
Figure 16 – Result of thermal distortion simulation and relationship between the
sample maximum internal temperature and the gap . 18
Figure 17 – Optical fibre withdrawal alternation under repeated power input to the
optical fixed attenuation (70 °C, 1 W, 30 min，repeated inputs) . 19
Figure 18 – High-power, long-term test results of the optical attenuator . 20

Table 1 – Test conditions of optical attenuators . 12
Table 2 – Conditions for high-power, long-term test of the optical attenuator . 19

– 4 – TR 62627-03-03  IEC:2013(E)
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
FIBRE OPTIC INTERCONECTING DEVICES
AND PASSIVE COMPONENTS –
Part 03-03: Reliability –
Report on high-power reliability for metal-doped
optical fibre plug-style optical attenuators

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 62627-03-03, which is a technical report, has been prepared by subcommittee 86B: Fibre
optic interconnecting devices and passive components, of IEC technical committee 86: Fibre
optics.
TR 62627-03-03  IEC:2013(E) – 5 –
The text of this technical report is based on the following documents:
Enquiry draft Report on voting
86B/3458/DTR 86B/3506/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 62627 series, published under the general title Fibre optic
interconnecting devices and passive components, 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 und
...