IEC TR 62343-6-9:2015

IEC TR 62343-6-9 ®
Edition 1.0 2015-06
TECHNICAL
REPORT
colour
inside
Dynamic modules –
Part 6-9: Design guide – Study of mechanisms and measurements of crosstalk
in wavelength-selective switches

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IEC TR 62343-6-9 ®
Edition 1.0 2015-06
TECHNICAL
REPORT
colour
inside
Dynamic modules –
Part 6-9: Design guide – Study of mechanisms and measurements of crosstalk

in wavelength-selective switches

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 33.180.01; 33.180.99 ISBN 978-2-8322-2769-5

– 2 – IEC TR 62343-6-9:2015 © IEC 2015
CONTENTS
FOREWORD . 4
INTRODUCTION . 6
1 Scope . 7
2 Normative references. 7
3 Abbreviations . 7
4 Study of dynamic crosstalk for WSS . 8
4.1 Static crosstalk and dynamic crosstalk . 8
4.2 Generation mechanism of dynamic crosstalk . 8
4.2.1 Configuration example of optical switching functionality . 8
4.2.2 Generation mechanism . 9
5 Measurement methods of dynamic crosstalk . 11
5.1 Study of measurement methods of dynamic crosstalk . 11
5.1.1 Referenced standard documents . 11
5.1.2 Test configuration of tuneable laser source (TLS) and optical power
meter . 12
5.1.3 Test configuration of tuneable laser source, OE converter and
oscilloscope . 12
5.1.4 Comparison of the measurement methods . 13
5.2 Evaluation of the measurement methods. 13
6 Measurement result of dynamic crosstalk . 14
6.1 MEMS type WSS . 14
6.1.1 Measurement conditions . 14
6.1.2 Measurement of different-channel crosstalk . 14
6.1.3 Measurement of same-channel crosstalk . 15
6.2 LCOS type WSS . 16
6.2.1 Measurement conditions . 16
6.2.2 Measurement of different-channel crosstalk . 17
6.2.3 Measurement of same-channel crosstalk . 17
6.3 DLP type WSS . 18
6.3.1 Measurement conditions . 18
6.3.2 Measurement procedure and result. 18
6.4 Summary . 20
7 Conclusion . 21
Bibliography . 22

Figure 1 – Block diagram of optical switching function . 9
Figure 2 – Dynamic crosstalk at WSS . 10
Figure 3 – Dynamic crosstalk at optical coupler for multiplexing . 11
Figure 4 – Dynamic crosstalk at receiver (Rx) . 11
Figure 5 – Test configuration of tuneable laser source (TLS) and optical power meter . 12
Figure 6 – Test configuration of tuneable laser source and oscilloscope . 13
Figure 7 – Experimental set-up . 14
Figure 8 – Measurement set-up of different-channel crosstalk . 15

Figure 9 – Measurement result of different-channel crosstalk for MEMS type WSS . 15
Figure 10 – Measurement result of same-channel crosstalk for MEMS type WSS . 16
Figure 11 – Measurement result of different-channel crosstalk for LCOS type WSS . 17
Figure 12 – Measurement result of same-channel crosstalk for LCOS type WSS . 18
Figure 13 – Switching characteristics for 1 × 2 DLP type WSS . 19
Figure 14 – Crosstalk measurement result of case a) for DLP type WSS . 19
Figure 15 – Crosstalk measurement result of case b) for DLP type WSS . 20
Figure 16 – Crosstalk measurement result of case c) for DLP type WSS . 20

Table 1 – Static crosstalk and dynamic crosstalk . 8
Table 2 – Same-channel crosstalk and different-channel crosstalk . 8
Table 3 – Generating mechanism of same-channel crosstalk and different-channel
crosstalk . 10

– 4 – IEC TR 62343-6-9:2015 © IEC 2015
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
DYNAMIC MODULES –
Part 6-9: Design guide – Study of mechanisms and
measurements of crosstalk in wavelength-selective switches

FOREWORD
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example "state of the art".
IEC TR 62343-6-9, which is a Technical Report, has been prepared by subcommittee SC86C:
Fibre optic systems and active devices, of IEC technical committee TC 86: Fibre optics.
The text of this Technical Report is based on the following documents:
Enquiry draft Report on voting
86C/1300/DTR 86C/1321/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 website under "http://webstore.iec.ch" in the data
related to the specific publication. At this date, the publication will be
• reconfirmed,
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