IEC 62343-3-3:2020

IEC 62343-3-3 ®
Edition 2.0 2020-04
REDLINE VERSION
INTERNATIONAL
STANDARD
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Dynamic modules –
Part 3-3: Performance specification templates – Wavelength selective switches

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IEC 62343-3-3 ®
Edition 2.0 2020-04
REDLINE VERSION
INTERNATIONAL
STANDARD
colour
inside
Dynamic modules –
Part 3-3: Performance specification templates – Wavelength selective switches

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 33.180.20 ISBN 978-2-8322-8185-7

– 2 – IEC 62343-3-3:2020 RLV © IEC 2020
CONTENTS
FOREWORD . 3
INTRODUCTION . 2
1 Scope . 6
2 Normative references . 6
3 Terms and definitions . 7
4 Test report . 7
5 Reference components .
5 Performance requirements. 14
5.1 Dimensions . 14
5.2 Sample size . 14
5.3 Test details and requirements . 14
Bibliography . 19

Figure 1 – Illustration of X-dB bandwidth .
Figure 2 – Illustration of adjacent channel crosstalk .
Figure 3 – Illustration of non-adjacent channel crosstalk .
Figure 4 – Illustration of latency time, rise time, fall time, bounce time, and switching
time .

Table 1 – Tests and requirements . 15

INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
DYNAMIC MODULES –
Part 3-3: Performance specification templates –
Wavelength selective 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
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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.
This redline version of the official IEC Standard allows the user to identify the changes
made to the previous edition. A vertical bar appears in the margin wherever a change has
been made. Additions are in green text, deletions are in strikethrough red text.

– 4 – IEC 62343-3-3:2020 RLV © IEC 2020
International Standard IEC 62343-3-3 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 2014. This edition
constitutes a technical revision.
This edition includes the following significant technical changes with respect to the previous
edition:
a) modification of the normative references;
b) modification of the terms and definitions.
The text of this standard is based on the following documents:
FDIS Report on voting
86C/1648/FDIS 86C/1655/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.
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.
IMPORTANT – The 'colour inside' logo on the cover page of this publication indicates
that it contains colours which are considered to be useful for the correct understanding
of its contents. Users should therefore print this document using a colour printer.

INTRODUCTION
A wavelength selective switch (WSS) is a dynamic module (DM), which is mainly used in a
reconfigurable optical add-drop multiplexer (ROADM) system to switch a particular wavelength
signal to any output ports in DWDM networks. The WSS module has one input port and a
plurality of output ports (i.e. 1 × N WSS) and can be used in reverse, with N input ports and one
output port, depending on its application. It is controlled with software, which determines any
wavelength signal among a DWDM signal from one input port to switch to a particular output
port in case of 1 × N application.

– 6 – IEC 62343-3-3:2020 RLV © IEC 2020
DYNAMIC MODULES –
Part 3-3: Performance specification templates –
Wavelength selective switches
1 Scope
This part of IEC 62343 provides a performance specification template for wavelength selective
switches. The object is to provide a framework for the preparation of detail specifications on the
performance of wavelength selective switches.
Additional specification parameters may be are often included for detailed product
specifications or performance specifications if necessary. However, specification parameters
specified in this document shall are not be removed from the detail product specifications or
performance specifications.
The technical information regarding wavelength selective switches and their applications in
DWDM systems with single-mode fibres will be are described in IEC TR 62343-6-4, currently
under consideration.
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 61300-3-6, Fibre optic interconnecting devices and passive components – Basic test and
measurement procedures – Part 3-6: Examinations and measurements – Return loss
IEC 61300-3-14, Fibre optic interconnecting devices and passive components – Basic test and
measurement procedures – Part 3-14: Examinations and measurements – Accuracy Error and
repeatability of the attenuation settings of a variable optical attenuator
IEC 61300-3-21, Fibre optic interconnecting devices and passive components – Basic test and
measurement procedures – Part 3-21: Examinations and measurements – Switching time and
bounce time
IEC 61300-3-29, Fibre optic interconnecting devices and passive components – Basic test and
measurement procedures – Part 3-29: Examinations and measurements – Measurement
techniques for characterizing the amplitude of the spectral transfer function of DWDM
components Spectral transfer characteristics of DWDM devices

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
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 61753-021-2, Fibre optic interconnecting devices and passive components performance
standard – Part 021-2: Grade C/3 single-mode fibre optic connectors for category C – Controlled
environment
IEC 62074-1, Fibre optic interconnecting devices and passive components – Fibre optic WDM
devices – Part 1: Generic specification
IEC 62343, Dynamic modules – General and guidance
IEC 62343-1, Dynamic modules – Part 1: Performance standards – General conditions
IEC 62343-4-1, Dynamic modules – Part 4-1: Software and hardware interface standards – 1x9
wavelength selective switch
IEC 62343-5-2, Dynamic modules – Part 5-2: Test methods – 1 x N fixed-grid WSS – Dynamic
crosstalk measurement
ITU-T Recommendation G.694.1, Spectral grids for WDM applications: DWDM frequency grid
ITU-T G.Sup39, Optical system design and engineering considerations
3 Terms and definitions
For the purpose of this document, the following terms and definitions given in IEC 62343 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
wavelength selective switch
WSS
dynamic module, which is mainly used in a reconfigurable optical add drop multiplexer (ROADM)
system to switch all wavelength signals to their respective required output port in DWDM
networks
Note 1 to entry: It is electrically controlled with software, which directs each wavelength signal among an input
DWDM signal from one input port to the required output port for each wavelength signal.
___________
Under consideration.
– 8 – IEC 62343-3-3:2020 RLV © IEC 2020
3.2
operating wavelength range
specified range of wavelengths from λ to λ about a nominal operating wavelength λ ,
imin imax I
within which a dynamic optical module is designed to operate with a specified performance and
generally corresponds to spectral bands for single-mode systems defined in ITU-T G.Sup39
3.3
port
optical fibre or optical fibre connector attached to a WSS module for the entry and/or exit of the
optical signal (input and/or output)
3.4
channel
signal at wavelength, λ, that corresponds to ITU grid (ITU-T Recommendation G.694.1) within
the range of operating wavelength range
3.5
channel spacing
centre-to-centre difference in frequency (or wavelength) between adjacent channels in a device
3.6
channel frequency range
frequency range within which a device is expected to operate with a specified performance
Note 1 to entry: For a particular nominal channel central frequency, f , this frequency range is from f = (f –
nomi imin nomi
∆f ) to f = (f + ∆f ), where ∆f is the maximum channel central frequency deviation.
max imax nomi max max
Note 2 to entry: Nominal channel centre frequency and maximum channel centre frequency deviation are defined
in ITU-T Rec. G.692.
3.7
insertion loss
IL
value defined in the equation below at the particular wavelength between two conducting ports
Note 1 to entry: It is the reduction in optical power between an input and output port of a module expressed in
decibels.
IL = –10 log (P /P )
out in
where
P is the optical power launched into input port;
in
P is the optical power received from the output port.
out
3.8
insertion loss uniformity
difference between the maximum and minimum insertion loss at the output for a specified set
of input ports
3.9
insertion loss ripple
maximum peak-to-peak variation of the insertion loss within a channel frequency (or wavelength)
range
3.10
X-dB passband width
width of a channel centred about the channel central wavelength within which the optical
attenuation is within X dB
Note 1 to entry: The terms “operating wavelength range” or “channel passband” are used and have the same
meaning as passband for DWDM devices. The X-dB bandwidth is defined through the spectral dependence of a
ij
(where i ≠ j) as the minimum wavelength range centred about the operating wavelength λ within which the variation
h
of a is less than X dB. The minimum wavelength range is determined considering thermal wavelength shift,
ij
polarization dependence and long-term aging shift (refer to Figure 1 below).
Note 2 to entry: It is recommended that the passband width be specified as 0,5 dB, 1 dB and 3 dB (X = 0,5, 1 and 3).
a
ij Centre wavelength shift
Longer centre
wavelength
Shorter centre wavelength
X dB X dB
X dB bandwidth
λ
Wavelength
h
IEC  1195/14
Figure 1 – Illustration of X-dB bandwidth
3.11
return loss
RL
fraction of input power that is returned from any port of a module expressed in decibels and
defined in this equation at the particular wavelength between two conducting ports
RL = –10 log (P /P )
refl in
where
P is the optical power launched into port;
in
P is the optical power received back from the same port.
refl
3.12
adjacent channel crosstalk
adjacent channel isolation
crosstalk with the restriction that x, the isolation wavelength number, is restricted to the
channels immediately adjacent to the (channel) wavelength number associated with output port
Note 1 to entry: Adjacent channel crosstalk is a negative value in dB (see Figure 2, below).
Note 2 to entry: The adjacent channel isolation is different from adjacent channel crosstalk. In Figure 2, an up-
pointing arrow shows positive, a down-pointing arrow negative. Generally, there are two adjacent channel isolations
for the shorter wavelength (higher frequency) side and a longer wavelength (lower frequency) side.
Note 3 to entry: The term crosstalk and isolation are often used with almost the same in meaning. Care should be
taken not to confuse crosstalk and isolation. Crosstalk is defined so that for WDM devices, the value of the ratio between
the optical power of the specified signal and the specified noise, is a negative value in dB. The crosstalk is defined
for each output port. Crosstalk for WDM devices is defined for a DEMUX (1 × N WDM device). The crosstalk for port
o to port j is the subtraction from the insertion loss of port i to o (conducting port pair) to the isolation of port j to o
(isolated port pair). For WDM devices having three of more ports, the crosstalk should be specified as the maximum
value of the crosstalk for each output port. On the other hand, isolation is the minimum value of a (where i ≠ j) within
ij
isolation wavelength range for isolated port pair. Isolation is positive value in dB.

Optical attenuation  (dB)
– 10 – IEC 62343-3-3:2020 RLV © IEC 2020
Non-adjacent Adjacent channel Adjacent channel Non-adjacent
Channel centre
channel centre centre frequency frequency centre frequency channel centre
frequency (wavelength) (wavelength) (wavelength) frequency
(wavelength)  (wavelength)
a
iox
a
ioc
Frequency  (THz) for DWDM devices, wavelength  (nm)

IEC  1196/14
Figure 2 – Illustration of adjacent channel crosstalk
3.13
non-adjacent channel crosstalk
non-adjacent channel isolation
crosstalk with the restriction that the isolation wavelength (frequency) is restricted to each of
the channels not immediately adjacent to the channel associated with output port
Note 1 to entry: The non-adjacent channel crosstalk is different from non-adjacent channel isolation. In Figure 3,
up-pointing arrow shows positive, down-pointing arrow negative.
Optical attenuation  (dB)
Adjacent channel isolation
Adjacent channel crosstalk
Non-adjacent Adjacent channel Adjacent channel Non-adjacent
Channel centre
channel centre centre frequency centre frequency channel centre
frequency
frequency (wavelength) (wavelength) (wavelength) frequency
(wavelength)  (wavelength)
a
iox
a
ioc
Frequency  (THz) for DWDM devices, wavelength  (nm)

IEC  1197/14
Figure 3 – Illustration of non-adjacent channel crosstalk
3.14
total channel crosstalk
total channel isolation
cumulative isolation due to the contributions at all the isolation wavelengths (frequencies) and
transfer matrix coefficient for ports i and j, t for any two ports i and j (where i ≠ j). It is the ratio
ij
defined as
 
 
 t (λ ) 
ij h
XT = −10 ×Log
 
tot
N
 
t (λ )
ij k
 ∑ 
 k(k ≠h) 
 
where
N is the number of channels of the device;
λ is the nominal operating wavelength (frequency) for the two of ports, i and j;
h
λ are the nominal isolation wavelengths (frequencies) for the same pair of ports.
k
Note 1 to entry: Total channel crosstalk is also expressed by total channel isolation as in the following equation:
XT = a (λ ) − I
tot ij h tot
Note 2 to entry: Total channel crosstalk is a negative value in dB. For a WDM device, total channel crosstalk shall
be specified as the maximum value of total channel crosstalk of all channels.
3.15
transient crosstalk
transient isolation/transient directivity
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 WSS module
Optical attenuation  (dB)
Non-adjacent channel isolation
Non-adjacent channel crosstalk

– 12 – IEC 62343-3-3:2020 RLV © IEC 2020
Note 1 to entry: Hitless operation means that there is no influence on other performance during switching operation.
3.16
channel blocking attenuation
attenuation value when a particular channel is set in the blocking state (possible maximum
attenuation)
3.17
attenuation without power
attenuation value when electric power for driving the attenuation is not supplied
3.18
variable attenuation range
attenuation value that can be changed with channel-by-channel independently controlled by
driving circuit with software
3.19
variable attenuation resolution
resolution of the setting of attenuation value
3.20
attenuation accuracy
precision of attenuation value when once set by driving circuit with software and includes the
point of view of both repeatability and stability in the timeframe
Note 1 to entry: This is important when used in open loop operation.
3.21
response time for attenuation
elapsed time to change the attenuation value of any channel from an initial value to the desired
value, measured from the time the actuation energy is applied
3.22
out-of-band attenuation
minimum attenuation (in dB) of channels that fall outside of the operating wavelength range
3.23
switching time
when switching from isolated state to conducting state, switching time (t ) is defined as follows
s
t = t + t + t
s l r b
where
t is latency time;
l
t is rise time;
r
t is bounce time.
b
Note 1 to entry: When switching from conducting state to isolated state, switching time (t ’) is defined as follows:
s
t ’ = t ’ + t + t ’
s l f b
where
t ’ is latency time;
l
t is fall time;
f
t ’ is bounce time.
b
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 '
Time
l r b l f b
t t '
s s
IEC  1052/14
where
t , t is the switching time;
s s'
t , t is the latency time;
l l'
t is the rise time;
r
t is the fall time;
f
t , t is the bounce time.
b b'
Figure 4 – Illustration of latency time, rise time, fall time,
bounce time, and switching time
Note 2 to entry: 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.
3.24
polarization dependent loss
PDL
maximum variation of insertion loss due to a variation of the state of polarization (SOP) over all
the SOPs
3.25
polarization mode dispersion
PMD
change in the shape and r.m.s. width of a pulse due to the average delay of the travelling time
between the two principal states of polarization (PSP), differential group delay (DGD), and/or
to the waveform distortion for each PSP
Note 1 to entry: PMD, together with polarization dependent loss (PDL) and polarization dependent gain (PDG),
when applicable, may introduce waveform distortion leading to unacceptable bit error increase.
3.26
group delay ripple
maximum peak-to-peak variation of the group delay approximated by a desired function as
wavelength (or frequency), typically a linear fit, within a channel wavelength (or frequency)
range
3.27
phase ripple
maximum peak-to-peak variation in measured phase spectrum when compared to a quadratic
fit within a channel wavelength (or frequency) range
Power
– 14 – IEC 62343-3-3:2020 RLV © IEC 2020
Note 1 to entry: Phase ripple (unit: radian) is calculated as the product of a peak-to-peak group delay ripple (unit: s)
and a period of group delay ripple (unit: Hz). Refer to IEC 61300-3-38.
3.28
chromatic dispersion
group delay difference between two closely spaced wavelengths inside an optical signal going
through a pair of conducting ports of a DWDM device
Note 1 to entry: It corresponds to the difference between the arrival times of these two closely spaced wavelengths.
Chromatic dispersion is defined as the variation (first order derivative) of this group delay over a range of wavelengths
especially over the channel operating wavelength range at the given time, temperature, pressure and humidity. It is
expressed in terms of units of ps/nm or ps/GHz and it is a predictor of the broadening of a pulse transmitted through
the module.
3.29
maximum input power (single channel)
allowable optical power which causes no damage by the optical power such as degradation of
adhesive or fibre fuse as for a particular channel
3.30
maximum input power (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
4 Test report
Fully documented test reports and supporting evidence shall be prepared and be available for
inspections as evidence that the tests have been carried out and complied with.
5 Reference components
The testing for these components does not require the use of reference components.
5 Performance requirements
5.1 Dimensions
Dimensions shall comply with either an appropriate IEC interface standard or with those given
in the manufacturer's drawings where the IEC interface standard does not exist or cannot be
used.
5.2 Sample size
The test sample size and sequencing requirements for the module components shall be defined
in the relevant specification.
5.3 Test details and requirements
Requirements are given only for non-connectorized WSS devices. For connectorized
components, the connector performances shall be in compliance with IEC 61753-021-2.
A minimum length of fibre or cable of 1,5 m per port shall be included in all climatic and
environmental tests.
NOTE A minimum length of launch fibre or cable of 1,5 m is used in IEC 61753-083-2:2007 and
IEC 61753-084-2:2007.
The channel spacings, unless otherwise specified, shall be in accordance with
ITU-T Recommendation G.694-1. Environmental test shall be measured for a single
input/output port combination.
The test details and requirements for performance standard are shown in Table 1.
Table 1 – Tests and requirements
No. Test parameter/test method Unit Details
1 Operating wavelength nm
2 Number of ports
3 Number of channels
a
4 Channel spacing
GHz
5 Channel frequency range GHz Information (not test item).
IEC 62074-1 Channel central frequency: ITU-T grid or custom design.
When there is no custom requrement, the channel central
frequency shall be selected in accordance with
ITU-T Recommendation G.694.1.
6 Insertion loss dB Condition: the insertion loss shall be determined as the worst case
over all states of polarization and over the operating wavelength
IEC 61300-3-29,
range.
IEC 62074-1
Launch fibre length: ≥ 1,5 m.
The test conditions shall provide loss measurement results with an
accuracy uncertainty of better less than ±0,05 0,1 dB over the
operating wavelength range.
7 Insertion loss uniformity dB Condition: the insertion loss uniformity shall be determined as the
worst case over all states of polarization including channel and
IEC 61300-3-29
port.
Launch fibre length: ≥ 1,5 m.
The test conditions shall provide loss measurement results with an
accuracy uncertainty of better less than ±0,05 0,1 dB over the
operating wavelength range.
8 Insertion loss ripple dB Condition: the insertion loss ripple shall be determined as the worst
case over all states of polarization.
IEC 61300-3-29
Launch fibre length: ≥ 1,5 m.
The test conditions shall provide loss measurement results with an
accuracy uncertainty of better less than ±0,05 0,1 dB over the
operating wavelength range.
9 X-dB passband width GHz Condition: the X-dB passband width, which is measured at X-dB
down (defined in Figure 1), shall be determined as the worst case
IEC 61300-3-29,
over all states of polarization.
IEC 62074-1
It is recommended that the passband width be specified as 0,5 dB,
1 dB and 3 dB.
Launch fibre length: ≥ 1,5 m
10 Return loss dB Condition: all ports not under test shall be terminated to avoid
unwanted reflections contributing to the measurement.
IEC 61300-3-6
Launch fibre length: ≥ 1,5 m.
The test conditions shall provide return loss measurement results
with an accuracy uncertainty of better less than ±0,1 0,2 dB over
the operating wavelength range.
11 Adjacent channel crosstalk dB Condition: the adjacent channel isolation shall be determined as
the worst case over all states of polarization.
IEC 61300-3-29,
IEC 62074-1 Launch fibre length: ≥ 1,5 m.
The test conditions shall provide isolation measurement results
with an accuracy uncertainty of better less than ±0,1 0,2 dB over
the operating wavelength range.

– 16 – IEC 62343-3-3:2020 RLV © IEC 2020
No. Test parameter/test method Unit Details
12 Non-adjacent channel crosstalk dB Condition: the non-adjacent channel isolation shall be determined
as the worst case over all states of polarization.
IEC 61300-3-29,
IEC 62074-1 Launch fibre length: ≥ 1,5 m.
The test conditions shall provide isolation measurement results
with an accuracy uncertainty of better less than ±0,1 0,2 dB over
the operating wavelength range.
13 Total channel crosstalk dB Condition: the minimum total channel isolation shall be determined
as the worst case over all states of polarization.
IEC 61300-3-29,
IEC 62074-1 Launch fibre length: ≥ 1,5 m.
The test conditions shall provide isolation measurement results
with an accuracy uncertainty of better less than ±0,1 0,2 dB over
the operating wavelength range.
14 Transient crosstalk dB Categorization, definition and measurement method are under
(transient isolation/transient consideration
directivity)
IEC 62343-5-2
15 Channel blocking attenuation dB
Launch fibre length: ≥ 1,5 m.
IEC 61300-3-7 61300-3-29 Launch conditions: the wavelength of the source shall be longer
than cut-off wavelength of the fibre.
Source: the stability at the operating measurement wavelength
uncertainty shall be better less than ±0,05 dB over the measuring
period of at least within 1 h.
Waveband to meet the operating wavelength of WSS.
Detector system: linearity within ±0,05 less than or equal to 0,1 dB.
Spectral response matched to source.
Dynamic range within the attenuation values to be measured.
16 Attenuation without power dB Launch fibre length: ≥ 1,5 m.
IEC 61300-3-7 61300-3-29
Launch conditions: the wavelength of the source shall be longer
than cut-off wavelength of the fibre.
Source: the stability at the operating measurement wavelength
uncertainty shall be better less than ±0,05 dB over the measuring
period of at least within 1 h.
Waveband to meet the operating wavelength of WSS.
Detector system: linearity within ±0,05 less than or equal to 0,1 dB.
Spectral response matched to source.
Dynamic range within the attenuation values to be measured.
17 Variable attenuation range dB
Launch fibre length: ≥ 1,5 m.
IEC 61300-3-7 61300-3-29
Launch conditions: the wavelength of the source shall be longer
than cut-off wavelength of the fibre.
Source: the stability at the operating measurement wavelength
uncertainty shall be better less than ±0,05 dB over the measuring
period of at least within 1 h.
Waveband to meet the operating wavelength of WSS.
Detector system linearity within ±0,05 less than or equal to 0,1 dB.
Spectral response matched to source.
Dynamic range within the attenuation values to be measured.
18 Variable attenuation resolution dB Method under consideration.
Same as measurement method of switching time defined in IEC
61300-3-21
No. Test parameter/test method Unit Details
19 Attenuation accuracy dB
Launch fibre length: ≥ 1,5 m.
IEC 61300-3-14 Launch conditions: the wavelength of the source shall be longer
than cut-off wavelength of the fibre.
Source: the stability at the operating measurement wavelength
uncertainty shall be better less than ±0,05 dB over the measuring
period of at least within 1 h.
Waveband to meet the operating wavelength of WSS.
Detector system: linearity within ±0,05 less than or equal to 0,1 dB.
Spectral response matched to source.
20 Response time for attenuation ms Method under consideration.
Similar as measurement method of switching time defined in
IEC 61300-3-21.
21 Out of band attenuation dB
IEC 61290-7-1
22 Switching time ms
IEC 61300-3-21
23 Polarization dependent loss dB The allowable PDL combination applies to all combination of input
and output ports.
IEC 61300-3-2,
IEC 62074-1 Launch fibre length: ≥ 1,5 m.
24 Polarization mode dispersion ps The allowable PMD combination applies to all combination of input
and output ports
IEC 61300-3-32,
IEC 62074-1
25 Group delay ripple ps IEC 61300-3-38
IEC 61300-3-38
26 Phase ripple rad IEC 61300-3-38
IEC 61300-3-38
27 Chromatic dispersion ps/nm IEC 61300-3-38
IEC 61300-3-38
28 Maximum input power dBm Input port: single port
(single channel)
IEC 61300-2-14
29 Maximum input power dBm Input port: single port
(single port)
IEC 61300-2-14
30 Storage temperature (range) ºC IEC 62343-1 for reference
31 Storage relative humidity RH % IEC 62343-1 for reference
32 Operating case temperature ºC Shall satisfy IEC 62343-1.
33 Operating relative humidity RH % Shall satisfy IEC 62343-1.
34 Temperature control (equipped or not)
35 Supply voltage V
36 Power consumption W
37 Module size mm × m
m × mm
38 Fibre type For example, IEC 60793-2-50.
39 Pigtail fibre length m
40 Pigtail fibre buffer diameter
µm
41 Optical connector For example, IEC 61754 series (all parts).
42 Optical connector labelling

– 18 – IEC 62343-3-3:2020 RLV © IEC 2020
No. Test parameter/test method Unit Details
43 Electrical interface Shall satisfy IEC 62343-4-1 for 1 × 9 WSS, under consideration.
44 Communication interfaces IEC 62343-4-1 for reference, under consideration.
a
50 GHz and 100 GHz are commercially available.

Bibliography
IEC 60793-2-50, Optical fibres – Part 2-50: Product specifications – Sectional specification for
class B single-mode fibres
IEC 60869-1, Fibre optic interconnecting devices and passive components – Fibre optic passive
power control devices – Part 1: Generic specification
IEC 60876-1, Fibre optic interconnecting devices and passive components – Fibre optic spatial
switches – Part 1: Generic specification
IEC 61300 (all parts), Fibre optic interconnecting devices and passive components – Basic test
and measurement procedures
IEC 61300-3-4, Fibre optic interconnecting devices and passive components – Basic test and
measurement procedures – Part 3-4: Examinations and measurements – Attenuation
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 61753-1, Fibre optic interconnecting devices and passive components performance
standard – Part 1: General and guidance for performance standards
IEC 61753-081-2, Fibre optic interconnecting devices and passive components – Performance
standard – Part 081-2: Non-connectorized single-mode fibre optic middle-scale 1 × N DWDM
devices for category C – Controlled environments
IEC 61753-083-2:2007, Fibre optic interconnecting devices and passive components
performance standard – Part 083-2: Non-connectorised single-mode fibre optic C-band/L-band
WDM devices for category C – Controlled environment
IEC 61753-084-2:2007, Fibre optic interconnecting devices and passive components
performance standard – Part 084-2: Non connectorised single-mode 980/1550 nm WWDM
devices for category C – Controlled environment
IEC 61753-1, Fibre optic interconnecting devices and passive components – Performance
standard – Part 1: General and guidance
IEC 61754 (all parts), Fibre optic interconnecting devices and passive components – Fibre optic
connector interfaces
IEC 61978-1, Fibre optic interconnecting devices and passive components – Fibre optic passive
chromatic dispersion compensators – Part 1: Generic specification
IEC 62343-4-1, Dynamic modules – Part 4-1: Software and hardware interface – 1 × 9
wavelength selective switch
IEC TR 62343-6-3, Dynamic modules – Part 6-3: Round robin measurement results for group
delay ripple of tunable dispersion compensators
___________
A third edition is under consideration.

– 20 – IEC 62343-3-3:2020 RLV © IEC 2020
IEC TR 62343-6-4, Dynamic modules – Part 6-4: Design guides – Reconfigurable optical
add/drop multiplexer (ROADM)
IEC TS 62538, Categorization of optical devices
ITU-T Recommendation G.671, Transmission characteristics of optical components and
subsystems
ITU-T Recommendation G.692, Optical interfaces for multichannel systems with optical
amplifiers
ITU-T G.Sup39, Optical system design and engineering considerations

_____________
___________
Under consideration.
IEC 62343-3-3 ®
Edition 2.0 2020-04
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Dynamic modules –
Part 3-3: Performance specification templates – Wavelength selective switches

Modules dynamiques –
Partie 3-3: Modèles de spécification de performance – Commutateurs sélectifs
en longueur d'onde
– 2 – IEC 62343-3-3:2020 © IEC 2020
CONTENTS
FOREWORD . 3
INTRODUCTION . 5
1 Scope . 6
2 Normative references . 6
3 Terms and definitions . 7
4 Test report . 7
5 Performance requirements. 7
5.1 Dimensions . 7
5.2 Sample size . 7
5.3 Test details and requirements . 7
Bibliography . 12

Table 1 – Tests and requirements . 8

INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
DYNAMIC MODULES –
Part 3-3: Performance specification templates –
Wavelength selective switches
FOREWORD
1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising
all national electrotechnical committees (IEC National Committees). The obj
...