IEC TR 62627-05:2013

Fibre optic interconnecting devices and passive components - Part 05: Investigation on impact of contamination and scratches on optical performance of single-mode (SM) and multimode (MM) connectors

IEC/TR 62627-05:2013(E) which is a technical report, summarizes the extensive industry research on development of cleanliness specifications for single-mode (SM) and multimode (MM) connectors. Keywords: cleanliness specifications for single-mode (SM) and multimode (MM) connectors.

General Information

• Status: Published
• Publication Date: 14-Oct-2013
• ICS: 01 - GENERALITIES. TERMINOLOGY. STANDARDIZATION. DOCUMENTATION
• ICS: 31.220.01 - Electromechanical components in general
• ICS: 33.180.20 - Fibre optic interconnecting devices
• Technical Committee: SC 86B - Fibre optic interconnecting devices and passive components
• Current Stage: PPUB - Publication issued
• Start Date: 31-Jan-2014
• Completion Date: 15-Oct-2013

Standards Content (Sample)

IEC/TR 62627-05 ®
Edition 1.0 2013-10
TECHNICAL
REPORT
colour
inside
Fibre optic interconnecting devices and passive components –
Part 05: Investigation on impact of contamination and scratches on optical
performance of single-mode (SM) and multimode (MM) connectors

IEC/TR 62627-05:2013(E)
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IEC/TR 62627-05 ®
Edition 1.0 2013-10
TECHNICAL
REPORT
colour
inside
Fibre optic interconnecting devices and passive components –

Part 05: Investigation on impact of contamination and scratches on optical

performance of single-mode (SM) and multimode (MM) connectors

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
PRICE CODE
V
ICS 33.180.20 ISBN 978-2-8322-1159-5

– 2 – TR 62627-05 © IEC:2013(E)
CONTENTS
FOREWORD . 4
INTRODUCTION . 6
1 Scope . 7
2 Normative references . 7
3 Abbreviations . 7
4 Experimental methodology. 8
5 The impact of scratches on A and RL of single-mode connectors. 9
6 Effects of scratches on RL of MM connectors . 10
7 Investigation of impact of contamination on optical performance of 2,5 mm and
1,25 mm connectors . 11
7.1 General . 11
7.2 Zone definitions . 11
7.3 Experimental data for 2,5 mm ferrule connectors . 12
7.4 Experimental data for 1,25 mm ferrule connectors (LC, MU) . 13
7.5 Image analysis . 16
7.6 Gaussian weighted per cent occluded area . 16
7.7 Inspection criteria matrix . 17
8 Correlation study between contamination and signal degradation in single-mode
APC connectors . 18
8.1 General . 18
8.2 Experimental data and analysis for SM APC connectors . 18
8.3 Inspection criteria matrix . 20
9 Development of cleanliness specifications for single-mode, angled physical
contact MPO connectors . 21
9.1 General . 21
9.2 Core zone analysis . 21
9.3 Cladding zone analysis . 21
9.4 MT APC scratch analysis . 23
10 Conclusion . 24
Annex A (informative) The nature of particle redistribution during series of
matings/dematings . 26
A.1 General . 26
A.2 Accumulation of particles near the core during repetitive fibre matings
and de-matings for 2,5 mm ferrule connectors . 26
A.3 Redistribution of particles during series of repetitive matings/de-matings
for MPO connectors . 28
A.4 Attenuation changes and separation factor . 29
Bibliography . 30

Figure 1 – Block diagram of design of experiment . 8
Figure 2 – Connector endface with the scratches outside the MFD area . 9
Figure 3 – Connector endface with scratches passing through the core . 10
Figure 4 – Examples of characterized endfaces using confocal microscope [7] . 10
Figure 5 – RL random mated connectors, λ=1 300 nm [7] . 11
Figure 6 – Influence of the particle location on performance . 12

TR 62627-05 © IEC:2013(E) – 3 –
Figure 7 – FC01 images of DUT and reference fibre after contamination and fifth
mating . 13
Figure 8 – FC04 images of DUT and reference fibre after contamination and second
mating . 13
Figure 9 – LC07 images of the DUT and the T07 reference fibre after contamination
and first mating . 14
Figure 10 – LC07 images of the DUT and the T07 reference fibre after contamination
and third mating . 15
Figure 11 – LC07 images of the DUT (Figure 11a) and the T07 reference fibre (Figure
11b) after contamination and fifth mating . 15
Figure 12 – Labelled detected particles with 5 µm annular rings and fibrescope image
for LC07-WD-5M . 16
Figure 13 – Delta attenuation versus GWPOA . 17
Figure 14 – Left to right: Group A, Group B and average return loss decrease by group . 18
Figure 15 – Behaviour of relatively large particles versus small particles . 19
Figure 16 – Test connector in pristine condition (RL= 67,5 dB) and after scratches
applied (RL= 68,5 dB) . 20
Figure 17 – Impact of contamination in core zone for SM APC MPO connectors . 21
Figure 18 – Contamination failures due to loss of physical contact by fibre position for
connections of angled MT ferrules . 22
Figure 19 – Endface images of DUT and reference connector showing no impact to
signal performance . 22
Figure 20 – Minimal MT/APC contamination on limit sample #1 with signal degradation . 23
Figure 21 – Typical lack of impact on signal performance of light scratches on
MT/APC connections . 24
Figure A.1 – Experimental methodology block diagram . 26
Figure A.2 – Relationship between the particle centre moving speed and the charge . 27
Figure A.3 – Particle migration and the A signal degradation of MPO connector
(channel 2) after series of matings/de-matings . 28
Figure A.4 – Evolution of particle centre position for channel 1-11 of an MPO connector
pair . 28
Figure A.5 – Measured and calculated delta attenuation as functions of GWPOA . 29

Table 1 – Summary of the result . 7
Table 2 – A and RL statistics for representative samples . 14
Table 3 – Inspection criteria for SMF pigtail and patch cord connectors, RL >45 dB . 18
Table 4 – Inspection criteria for single-mode APC pigtail and patch cord connectors . 20

– 4 – TR 62627-05 © IEC:2013(E)
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
FIBRE OPTIC INTERCONNECTING DEVICES
AND PASSIVE COMPONENTS –
Part 05: Investigation on impact of contamination and
scratches on optical performance of single-mode (SM)
and multimode (MM) connectors
FOREWORD
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