Dynamic modules - Part 3-4: Performance specification templates - Multicast optical switches

IEC 62343-3-4: 2018 provides a performance specification template for multicast optical switches. The object is to provide a framework for the preparation of performance specifications or product specifications of multicast optical switches. Specification parameters required in this document are considered as essential in the product specifications or performance specifications.
Keywords: multicast optical switch (MCOS)

Modules dynamiques - Partie 3-4: Modèles de spécification de performance - Commutateurs optiques multidiffusions

IEC 62343-3-4:2018 donne un modèle de spécification de performance pour les commutateurs optiques multidiffusions. L'objet de la présente norme est de fournir un cadre pour la préparation des spécifications de performance ou des spécifications de produit applicables aux commutateurs optiques multidiffusions. Les paramètres de spécification exigés dans le présent document sont jugés comme étant essentiels dans les spécifications de performance ou les spécifications de produit.
Mots clés: commutateur optique multidiffusion MCOS)

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Publication Date
26-Apr-2018
Current Stage
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Completion Date
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IEC 62343-3-4
Edition 1.0 2018-04
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Dynamic modules –
Part 3-4: Performance specification templates – Multicast optical switches
Modules dynamiques –
Partie 3-4: Modèles de spécification de performance – Commutateurs optiques
multidiffusions
IEC 62343-3-4:2018-04(en-fr)
---------------------- Page: 1 ----------------------
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---------------------- Page: 2 ----------------------
IEC 62343-3-4
Edition 1.0 2018-04
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Dynamic modules –
Part 3-4: Performance specification templates – Multicast optical switches
Modules dynamiques –
Partie 3-4: Modèles de spécification de performance – Commutateurs optiques
multidiffusions
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 33.180.01; 33.180.99 ISBN 978-2-8322-5612-1

Warning! Make sure that you obtained this publication from an authorized distributor.

Attention! Veuillez vous assurer que vous avez obtenu cette publication via un distributeur agréé.

® Registered trademark of the International Electrotechnical Commission
Marque déposée de la Commission Electrotechnique Internationale
---------------------- Page: 3 ----------------------
– 2 – IEC 62343-3-4:2018 © IEC 2018
CONTENTS

FOREWORD ........................................................................................................................... 3

INTRODUCTION ..................................................................................................................... 5

1 Scope .............................................................................................................................. 6

2 Normative references ...................................................................................................... 6

3 Terms and definitions ...................................................................................................... 7

4 Performance specification templates ............................................................................. 14

5 Electromagnetic compatibility (EMC) requirements ........................................................ 18

Bibliography .......................................................................................................................... 19

Figure 1 – Functional block diagram of the MCOS .................................................................. 8

Figure 2 – Representation of latency time, rise time, fall time, bounce time, and

switching time ....................................................................................................................... 13

Table 1 – General performance specification template for MCOS .......................................... 14

Table 2 – Optical performance specification template for MCOS ........................................... 15

Table 3 – Electrical and communication performance specification template for MCOS ......... 17

Table 4 – Mechanical performance specification template for MCOS .................................... 18

---------------------- Page: 4 ----------------------
IEC 62343-3-4:2018 © IEC 2018 – 3 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
DYNAMIC MODULES –
Part 3-4: Performance specification templates –
Multicast optical switches
FOREWORD

1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising

all national electrotechnical committees (IEC National Committees). The object of 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, IEC publishes International Standards, Technical Specifications,

Technical Reports, Publicly Available Specifications (PAS) and Guides (hereafter referred to as “IEC

Publication(s)”). 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. 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 IEC on technical matters express, as nearly as possible, an international

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3) IEC Publications have the form of recommendations for international use and are accepted by IEC National

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6) All users should ensure that they have the latest edition of this publication.

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Publications.

8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is

indispensable for the correct application of this publication.

9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of

patent rights. IEC shall not be held responsible for identifying any or all such patent rights.

International Standard IEC 62343-3-4 has been prepared by subcommittee 86C: Fibre optic

systems and active devices, of IEC technical committee 86: Fibre optics.
The text of this International Standard is based on the following documents:
FDIS Report on voting
86C/1506/FDIS 86C/1508/RVD

Full information on the voting for the approval of this International Standard can be found in

the report on voting indicated in the above table.

This document has been drafted in accordance with the ISO/IEC Directives, Part 2.

---------------------- Page: 5 ----------------------
– 4 – IEC 62343-3-4:2018 © IEC 2018

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 document will remain unchanged until the

stability date indicated on the IEC website under "http://webstore.iec.ch" in the data related to

the specific document. At this date, the document will be
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.
---------------------- Page: 6 ----------------------
IEC 62343-3-4:2018 © IEC 2018 – 5 –
INTRODUCTION

A multicast optical switch (MCOS) is a dynamic module (DM), which is mainly used in a

reconfigurable optical add-drop multiplexer (ROADM) system to realize colourless,

directionless and contentionless (CDC) function. A multicast optical switch functions as an

optical switch and a non-wavelength selective fibre optic branching devices. The technical

information regarding multicast optical switches and their applications in dense wavelength

division multiplexing (DWDM) systems is described in IEC TR 62343-6-4.
---------------------- Page: 7 ----------------------
– 6 – IEC 62343-3-4:2018 © IEC 2018
DYNAMIC MODULES –
Part 3-4: Performance specification templates –
Multicast optical switches
1 Scope

This part of IEC 62343 provides a performance specification template for multicast optical

switches. The object is to provide a framework for the preparation of performance

specifications or product specifications of multicast optical switches.

Specification parameters required in this document are considered as essential in the product

specifications or performance specifications.
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 61290-7-1, Optical amplifiers – Test methods – Part 7-1: Out-of-band insertion losses –

Filtered optical power meter method

IEC 61300-2-14, Fibre optic interconnecting devices and passive components – Basic test

and measurement procedures – Part 2-14: Tests – High optical power

IEC 61300-3-2, Fibre optic interconnecting devices and passive components – Basic test and

measurement procedures – Part 3-2: Examination and measurements – Polarization
dependent loss in a single-mode fibre optic device

IEC 61300-3-3, Fibre optic interconnecting devices and passive components – Basic test and

measurement procedures – Part 3-3: Examinations and measurements – Active monitoring of

changes in attenuation and return loss

IEC 61300-3-6, Fibre optic interconnecting devices and passive components – Basic test and

measurement procedures – Part 3-6: Examinations and measurements – Return loss

IEC 61300-3-7, Fibre optic interconnecting devices and passive components – Basic test and

measurement procedures – Part 3-7: Examinations and measurements – Wavelength
dependence of attenuation and return loss of single mode components

IEC 61300-3-20, Fibre optic interconnecting devices and passive components – Basic test

and measurement procedures – Part 3-20: Examinations and measurements – Directivity of

fibre optic branching devices

IEC 61300-3-21, Fibre optic interconnecting devices and passive components – Basic test

and measurement procedures – Part 3-21: Examinations and measurements – Switching time

IEC 61300-3-32, Fibre optic interconnecting devices and passive components – Basic test

and measurement procedures – Part 3-32: Examinations and measurements – Polarization

mode dispersion measurement for passive optical components
---------------------- Page: 8 ----------------------
IEC 62343-3-4:2018 © IEC 2018 – 7 –

IEC 61300-3-38, Fibre optic interconnecting devices and passive components – Basic test

and measurement procedures – Part 3-38: Examinations and measurements – Group delay,

chromatic dispersion and phase ripple

IEC 61300-3-50, Fibre optic interconnecting devices and passive components – Basic test

and measurement procedures – Part 3-50: Examinations and measurements – Crosstalk for

optical spatial switches

IEC 62343-1:2016, Dynamic modules – Part 1: Performance standards – General conditions

IEC 62343-5-2, Dynamic modules – Part 5-2: Test methods – 1 x N fixed-grid WSS – Dynamic

crosstalk measurement
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.

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
3.1
multicast optical switch
MCOS

dynamic module, which has port configuration of N × M, including N of 1 × M non-wavelength

selective branching devices and M of N × 1 optical switches
Note 1 to entry: N ≥ 2 and M ≥ 2, in general.

Note 2 to entry: Generally, for the N port side, an add/drop functional block is connected; for the M port side, a

transponder functional block is connected. If required, a tuneable optical filter functional block is connected

between this module and the transponder functional block.
Note 3 to entry: The MCOS has electrical interface to control switches.

Note 4 to entry: Non-blocking switches are employed for the N × 1 optical switch element of the MCOS.

Note 5 to entry: A general function block diagram is shown in Figure 1. It consists primarily of two optical blocks.

Block 1 is prepared for the drop signal and Block 2 for the add signal.

Note 6 to entry: Generally, this module works optically in both directions: N side to M side, and M side to N side.

Note 7 to entry: Generally, block state of the MCOS module is supported for each side port by the block state for

N × 1 optical element or by similar technology.
Note 8 to entry: This comment applies to the French language only.
---------------------- Page: 9 ----------------------
– 8 – IEC 62343-3-4:2018 © IEC 2018
N ports N ports
Electrical
I/F
Electronic
1 × M 1 × M 1 × M 1 × M 1 × M 1 × M 1 × M 1 × M
controller
N × 1 N × 1 N × 1 N × 1 N × 1 N × 1 N × 1 N × 1
M ports M ports
Block 1 for drop signal from ROADM Block 2 for add signal to ROADM
Key
1 × M 1 × M optical branching device
N × 1 N × 1 optical switch
IEC
Figure 1 – Functional block diagram of the MCOS
3.2
N side insertion loss difference between different ports
diffN

difference between the maximum and minimum insertion loss at an N side port for a specified

set of an M side port
3.3
M side insertion loss difference between different ports
diffM

difference between the maximum and minimum insertion loss at an M side port for a specified

set of an N side port
3.4
crosstalk

ratio of the output power of the isolated input port to the output power of the conducting input

port for an output port
3.5
cumulative crosstalk

ratio of the output power between signal power from the conducting input port and the

cumulative signal power from all of the relevant isolated input port

Note 1 to entry: Assume output port k has relevant input port 1, 2, 3, …N, and the conductive port pair is only port

i to port k, and the other input ports are in a non-conductive state to output port k. The same optical input power is

applied to all input ports. The output power appearing in port k from port i is expressed as P . With this condition,

cumulative crosstalk is calculated as:
---------------------- Page: 10 ----------------------
IEC 62343-3-4:2018 © IEC 2018 – 9 –
 
∑ j≠i j
 
− 10log
 
 
where
P is the optical power measured at output port k from conductive port i;
P is the optical power measured at output port k from isolated port j.

Note 2 to entry: Generally, cumulative crosstalk has different values for different signal directions: N side to M

side, and M side to N side in an N x M module.

Note 3 to entry: Defined in optical signal with averaged polarization and the same wavelength.

3.6
dynamic crosstalk

crosstalk that is attributed to both channel crosstalk (due to same wavelength and/or other

wavelengths) and port isolation, predicted to change during switching operation in MCOS

module

Note 1 to entry: Hitless operation means that there is no influence on other performance during the switching

operation.

[SOURCE: IEC 62343-3-3:2014, 3.15, modified – The term "transient crosstalk" has been

replaced by "dynamic crosstalk", and the abbreviated term "WSS" has been replaced by

"MCOS" in the definition.]
3.7
latency time

elapsed time for the output power of a

specified output port to reach 10 % of its steady-state value from the time the actuation

energy is applied, when switching from an isolated state to conducting state, normally-off for a

non-latching switch, or a latching switch
Note 1 to entry: See Figure 2.
[SOURCE: IEC 60876-1:2014, 3.3.5.1]
3.8
latency time
t '

elapsed time for the output power of a specified output port to reach 90 % of its steady-state

value from the time the actuation energy is removed, when switching from a conducting state

to isolated state, normally-off for a non-latching switch
Note 1 to entry: See Figure 2.
[SOURCE: IEC 60876-1:2014, 3.3.5.2]
3.9
latency time
t '

elapsed time when

the output power of a specified output port reaches 90 % of its steady-state value from the

time the actuation energy is applied, when switching from a conducting state to isolated state,

for a latching switch
Note 1 to entry: See Figure 2.
[SOURCE: IEC 60876-1:2014, 3.3.5.3, modified – Note 1 has been deleted.]
---------------------- Page: 11 ----------------------
– 10 – IEC 62343-3-4:2018 © IEC 2018
3.10
rise time

elapsed time when the output power of the specified output port rises from 10 % of the

steady-state value to 90 % of the steady-state value
[SOURCE: IEC 60876-1: 2014, 3.3.6, modified – The symbol t has been added.]
3.11
fall time

elapsed time when the output power of the specified output port falls from 90 % of the

steady-state value to 10 % of the steady-state value
[SOURCE: IEC 60876-1:2014, 3.3.7, modified – The symbol t has been added.]
3.12
bounce time

elapsed time when the output power of a

specified output port maintains between 90 % and 110 % of its steady-state value from the

first time the output power of a specified output port reaches to 90 % of its steady-state value

Note 1 to entry: See Figure 2.
[SOURCE: IEC 60876-1:2014, 3.3.8.1]
3.13
bounce time
t '

elapsed time when the output power of a

specified output port maintains between 0 % and 10 % of its steady-state value from the first

time the output power of a specified output port reaches 10 % of its steady-state value

Note 1 to entry: See Figure 2.
[SOURCE: IEC 60876-1:2014, 3.3.8.2]
3.14
switching time

elapsed time from actuation to the time

when the output power of a specified output port maintains between 90 % and 110 % of its

steady-state value:
t = t + t + t
s l r b
where
t is the latency time;
t is the rise time;
t is the bounce time.
Note 1 to entry: See Figure 2 a), 2 b) and 2 c).
---------------------- Page: 12 ----------------------
IEC 62343-3-4:2018 © IEC 2018 – 11 –
3.15
switching time
t '

elapsed time from actuation to the time

when the output power of a specified output port falls below 10 % of the steady state level:

t ' = t ' + t + t '
s l f b
where
t ' is the latency time;
t is the fall time;
t ' is the bounce time
Note 1 to entry: See Figure 2 a), 2 b) and 2 c)
Actuation energy supply
Output port power
110 % of steady-state
Steady-state
90 % of steady-state
10 % of steady-state
t ' t t '
t t t
f b
l r b l
Time
t '
IEC
Key
t , t ' switching time
s s
t , t ' latency time
l l
t rise time
t fall time
t , t ' bounce time
b b
a) – Non-latching switch, normally-off
Power
---------------------- Page: 13 ----------------------
– 12 – IEC 62343-3-4:2018 © IEC 2018
Actuation energy supply
Actuation energy
Output port power
110 % of steady-state
Steady-state
90 % of steady-state
10 % of steady-state
t t
Time
l r
t ' t t '
l f b
t t '
IEC
Key
t , t ' switching time
s s
t , t ' latency time
l l
t rise time
t fall time
t , t ' bounce time
b b
b) – Non-latching switch, normally-on
Power
---------------------- Page: 14 ----------------------
IEC 62343-3-4:2018 © IEC 2018 – 13 –
Output port power
Actuation energy supply
110 % of steady-state
Steady-state
90 % of steady-state
10 % of steady-state
t t t t ' t t ' Time
l r b l f b
t '
Actuation energy supply
IEC
Key
t , t ' switching time
s s
t , t ' latency time
l l
t rise time
t fall time
t , t ' bounce time
b b
c) – Latching switch

If, for any reason, the steady-state power of the isolated state is not zero, all the power levels leading to the

definitions of latency time, rise time, fall time, bounce time and, thus, of switching time should be normalized,

subtracting from them the steady-state power of the isolated state, before applying such definitions.

Figure 2 – Representation of latency time, rise time, fall time,
bounce time, and switching time
3.16
switching time matrix

matrix of coefficients in which each coefficient S is the longest switching time to turn path ij

on or off from any initial state
[SOURCE: IEC 60876-1:2014, 3.3.10, modified – The figure has been deleted.]
3.17
maximum input power to single port

allowable optical power, which causes no damage by the optical power such as degradation

of adhesive or fibre fuse as for a particular port
[SOURCE: IEC 62343-3-3:2014, 3.30, modified – The term has been changed from
"maximum input power (single port)" to "maximum input power to single port".]
Power
---------------------- Page: 15 ----------------------
– 14 – IEC 62343-3-4:2018 © IEC 2018
4 Performance specification templates

The performance specification templates of Clause 4 are applied for connectorized and non-

connectorized MCOS modules. For connectorized modules, the connector performances

should be in compliance with IEC 61753-021-2.

The performance parameters, requirement (R) or option (O), units and measurement methods

and conditions are shown in Table 1, Table 2, Table 3 and Table 4.
Table 1 – General performance specification template for MCOS
Performance
No. R/O Min. Max. Units Measurement methods and conditions
parameters
1 Storage temperature
R ºC IEC 62343-1:2016, Annex A
range
2 Storage relative IEC 62343-1:2016, Annex A
R %
humidity range
3 Operating case IEC 62343-1
R ºC
temperature range
4 Operating relative
R %
humidity range
---------------------- Page: 16 ----------------------
IEC 62343-3-4:2018 © IEC 2018 – 15 –
Table 2 – Optical performance specification template for MCOS
Performance Measurement methods and
No. R/O Min. Max. Units
parameters conditions
1 Operating R nm Defined as the minimum wavelength to
wavelength range the maximum wavelength
2 Port configuration R - Defined as M × N.
3 Insertion loss R dB IEC 61300-3-7
Condition: insertion loss shall be
determined over all states of
polarization, over the operating
wavelength range and temperature
range
Launch fibre length: ≥ 1,5 m
The test conditions shall provide loss
measurement results with an accuracy
of smaller than ≤ 0,05 dB over the
operating wavelength range
4 Insertion loss R n/a dB IEC 61300-3-7
uniformity
Condition: average state of polarization
(SOP) over the operating wavelength
and temperature range
Launch fibre length: ≥ 1,5 m
Measurement uncertainty: ≤ 0,05 dB
5 Block state O n/a dB Insertion loss under block state of the
attenuation
N × 1 switch.
Method: under consideration.
N side insertion
6 O n/a dB IEC 61300-3-7
loss difference
Condition: average SOP over the
between different
operating wavelength and temperature
ports
range
diffN
Launch fibre length: ≥ 1,5 m
Measurement uncertainty: ≤ 0,05 dB
7 M side insertion O n/a dB IEC 61300-3-7
loss difference
Condition: average SOP over the
between different
operating wavelength and temperature
ports
range
diffM
Launch fibre length: ≥ 1,5 m
Measurement uncertainty: ≤ 0,05 dB
8 Polarization R n/a dB IEC 61300-3-2
dependent loss
The allowable PDL combination applies
PDL
to all combinations of input and output
ports.
Launch fibre length: ≥ 1,5 m
Measurement uncertainty: ≤ 0,05 dB
9 Temperature O n/a dB IEC 61300-3-3
dependence loss
IEC 61300
...

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