Dynamic modules - Performance specification templates - Part 3-3: Wavelength selective switches

EN IEC 62343-3-3 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 included for detailed product specifications or performance specifications. However, specification parameters specified in this standard shall not be removed from the detail product specifications or performance specifications. The technical information regarding wavelength selective switches, and their applications in DWDM systems will be described in IEC TR 62343-6-4, currently under consideration.

Dynamische Module - Teil 3-3: Vorlagen für Leistungsspezifikationen - Wellenlängen-Wählschalter

Modules dynamiques - Modèles de spécification de performance - Partie 3-3: Commutateurs sélectifs en longueur d'onde

L'IEC 62343-3-3:2014 présente un modèle de spécification de performance pour les commutateurs sélectifs en longueur d'onde. Il est destiné à fournir un cadre pour la préparation de spécifications particulières applicables aux commutateurs sélectifs en longueur d'onde et à leurs performances. Des paramètres de spécification supplémentaires peuvent être inclus pour les spécifications détaillées de produit ou de performances. Toutefois, les paramètres de spécification stipulés dans la présente norme ne doivent pas être retirés des spécifications particulières de produit ou de performances. Les informations techniques concernant les commutateurs sélectifs en longueur d'onde et leurs applications dans les systèmes DWDM seront décrites dans l'IEC TR 62343-6-4, actuellement à l'étude. Mots clés: spécification de performance pour les commutateurs sélectifs en longueur d'onde

Dinamični moduli - Predloge za tehnične specifikacije - 3-3. del: Valovnodolžinska selektivna stikala (IEC 62343-3-3:2014)

Standard EN IEC 62343-3-3 zagotavlja predloge za tehnične specifikacije za valovnodolžinska selektivna stikala. Namen je zagotoviti ogrodje za pripravo podrobnih specifikacij o delovanju valovnodolžinskih selektivnih stikal. Vključeni so lahko dodatni specifikacijski parametri, da se omogoči podrobne specifikacije proizvodov ali delovanja. Specifikacijskih parametrov iz tega standarda se ne sme odstraniti iz podrobnih specifikacij proizvoda ali delovanja. Te tehnične informacije o valovnodolžinskih selektivnih stikalih in njihovih uporabah v sistemih DWDM bodo opisane v standardu IEC TR 62343-6-4, ki je trenutno še v obravnavi.

General Information

Status
Published
Publication Date
12-Aug-2014
Technical Committee
Current Stage
6060 - National Implementation/Publication (Adopted Project)
Start Date
14-Jul-2014
Due Date
18-Sep-2014
Completion Date
13-Aug-2014

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SLOVENSKI STANDARD
SIST EN 62343-3-3:2014
01-september-2014

'LQDPLþQLPRGXOL3UHGORJH]DWHKQLþQHVSHFLILNDFLMHGHO9DORYQRGROåLQVND

VHOHNWLYQDVWLNDOD ,(&

Dynamic modules - Performance specification templates - Part 3-3: Wavelength selective

switches
Modules dynamiques - Modèles de spécification de performance - Partie 3-3:
Commutateurs sélectifs en longueur d'onde
Ta slovenski standard je istoveten z: EN 62343-3-3:2014
ICS:
31.220.20 Stikala Switches
33.180.30 2SWLþQLRMDþHYDOQLNL Optic amplifiers
SIST EN 62343-3-3:2014 en

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

---------------------- Page: 1 ----------------------
SIST EN 62343-3-3:2014
---------------------- Page: 2 ----------------------
SIST EN 62343-3-3:2014
EUROPEAN STANDARD EN 62343-3-3
NORME EUROPÉENNE
EUROPÄISCHE NORM
July 2014
ICS 33.180.20
English Version
Dynamic modules - Part 3-3: Performance specification
templates - Wavelength selective switches
(IEC 62343-3-3:2014)

Modules dynamiques - Partie 3-3: Modèles de spécification Dynamische Module - Vorlagen für Leistungsspezifikationen

de performance - Commutateurs sélectifs en longueur - Teil 3-3: Wellenlängen-Wählschalter

d'onde (IEC 62343-3-3:2014)
(CEI 62343-3-3:2014)

This European Standard was approved by CENELEC on 2014-06-10. CENELEC members are bound to comply with the CEN/CENELEC

Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration.

Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the CEN-CENELEC

Management Centre or to any CENELEC member.

This European Standard exists in three official versions (English, French, German). A version in any other language made by translation

under the responsibility of a CENELEC member into its own language and notified to the CEN-CENELEC Management Centre has the

same status as the official versions.

CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Croatia, Cyprus, the Czech Republic,

Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia,

Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland,

Turkey and the United Kingdom.
European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels

© 2014 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.

Ref. No. EN 62343-3-3:2014 E
---------------------- Page: 3 ----------------------
SIST EN 62343-3-3:2014
EN 62343-3-3:2014 - 2 -
Foreword

The text of document 86C/1156/CDV, future edition 1 of IEC 62343-3-3, prepared by SC 86C "Fibre

optic systems and active devices” of IEC/TC 86 “Fibre optics" was submitted to the IEC-CENELEC

parallel vote and approved by CENELEC as EN 62343-3-3:2014.
The following dates are fixed:
(dop) 2015-03-10
• latest date by which the document has to be
implemented at national level by
publication of an identical national
standard or by endorsement
• latest date by which the national (dow) 2017-06-10
standards conflicting with the
document have to be withdrawn

Attention is drawn to the possibility that some of the elements of this document may be the subject of

patent rights. CENELEC [and/or CEN] shall not be held responsible for identifying any or all such

patent rights.
Endorsement notice

The text of the International Standard IEC 62343-3-3:2014 was approved by CENELEC as a

European Standard without any modification.

In the official version, for Bibliography, the following notes have to be added for the standards indicated:

IEC 60793-2-50 NOTE Harmonized as EN 60793-2-50.
IEC 60869-1 NOTE Harmonized as EN 60869-1.
IEC 60876-1 NOTE Harmonized as EN 60876-1.
IEC 61300 Series NOTE Harmonized as EN 61300 Series (partially modified).
IEC 61300-3-4 NOTE Harmonized as EN 61300-3-4.
IEC 61300-3-20 NOTE Harmonized as EN 61300-3-20.
IEC 61753-1 NOTE Harmonized as EN 61753-1.
IEC 61753-081-2 NOTE Harmonized as EN 61753-081-2.
IEC 61754 Series NOTE Harmonized as EN 61754 Series (partially modified).
IEC 61978-1 NOTE Harmonized as EN 61978-1.
---------------------- Page: 4 ----------------------
SIST EN 62343-3-3:2014
- 3 - EN 62343-3-3:2014
Annex ZA
(normative)
Normative references to international publications
with their corresponding European publications

The following documents, in whole or in part, are normatively referenced in this document and are

indispensable for its application. For dated references, only the edition cited applies. For undated

references, the latest edition of the referenced document (including any amendments) applies.

NOTE 1 When an International Publication has been modified by common modifications, indicated by (mod), the relevant

EN/HD applies.

NOTE 2 Up-to-date information on the latest versions of the European Standards listed in this annex is available here:

www.cenelec.eu
Publication Year Title EN/HD Year
IEC 61290-7-1 - Optical amplifiers - Test methods - EN 61290-7-1 -
Part 7-1: Out-of-band insertion losses -
Filtered optical power meter method
IEC 61300-2-14 - Fibre optic interconnecting devices and EN 61300-2-14 -
passive components - Basic test and
measurement procedures -
Part 2-14: Tests - High optical power
IEC 61300-3-2 - Fibre optic interconnecting devices and EN 61300-3-2 -
passive components - Basic test and
measurement procedures -
Part 3-2: Examinations and measurements -
Polarization dependent loss in a single-
mode fibre optic device
IEC 61300-3-6 - Fibre optic interconnecting devices and EN 61300-3-6 -
passive components - Basic test and
measurement procedures -
Part 3-6: Examinations and measurements -
Return loss
IEC 61300-3-14 - Fibre optic interconnecting devices and EN 61300-3-14 -
passive components - Basic test and
measurement procedures -
Part 3-14: Examinations and measurements
- Accuracy and repeatability of the
attenuation settings of a variable attenuator
IEC 61300-3-21 - Fibre optic interconnecting devices and EN 61300-3-21 -
passive components - Basic test and
measurement procedures -
Part 3-21: Examinations and measurements
- Switching time
IEC 61300-3-29 - Fibre optic interconnecting devices and EN 61300-3-29 -
passive components - Basic test and
measurement procedures -
Part 3-29: Examinations and measurements
- Spectral transfer characteristics of DWDM
devices
---------------------- Page: 5 ----------------------
SIST EN 62343-3-3:2014
EN 62343-3-3:2014 - 4 -
Publication Year Title EN/HD Year
IEC 61300-3-32 - Fibre optic interconnecting devices and EN 61300-3-32 -
passive components - Basic test and
measurement procedures -
Part 3-32: Examinations and measurements
- Polarisation mode dispersion
measurement for passive optical
components
IEC 61300-3-38 - Fibre optic interconnecting devices and EN 61300-3-38 -
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 EN 61753-021-2 -
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 EN 62074-1 -
passive components - Fibre optic WDM
devices -
Part 1: Generic specification
IEC 62343-4-1 - Dynamic modules - - -
Part 4-1: Software and hardware interface
standards - 1x9 wavelength selective switch
ITU-T - Spectral grids for WDM applications: DWDM - -
Recommendation frequency grid
G.694.1
ITU-T - Optical system design and engineering - -
Recommendation considerations
G.Sup39
Under consideration.
---------------------- Page: 6 ----------------------
SIST EN 62343-3-3:2014
IEC 62343-3-3
Edition 1.0 2014-05
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
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
PRICE CODE
INTERNATIONALE
CODE PRIX R
ICS 33.180.20 ISBN 978-2-8322-1544-9

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: 7 ----------------------
SIST EN 62343-3-3:2014
– 2 – IEC 62343-3-3:2014 © IEC 2014
CONTENTS

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

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

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

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

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

4 Test report ..................................................................................................................... 14

5 Reference components .................................................................................................. 14

6 Performance requirements ............................................................................................ 14

6.1 Dimensions ........................................................................................................... 14

6.2 Sample size .......................................................................................................... 14

6.3 Test details and requirements ............................................................................... 14

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

Figure 1 – Illustration of X-dB bandwidth ................................................................................. 9

Figure 2 – Illustration of adjacent channel crosstalk .............................................................. 10

Figure 3 – Illustration of non-adjacent channel crosstalk ....................................................... 11

Figure 4 – Illustration of latency time, rise time, fall time, bounce time, and switching

time ...................................................................................................................................... 13

Table 1 – Tests and requirements ......................................................................................... 15

---------------------- Page: 8 ----------------------
SIST EN 62343-3-3:2014
IEC 62343-3-3:2014 © IEC 2014 – 3 –
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 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

consensus of opinion on the relevant subjects since each technical committee has representation from all

interested IEC National Committees.

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

Committees in that sense. While all reasonable efforts are made to ensure that the technical content of IEC

Publications is accurate, IEC cannot be held responsible for the way in which they are used or for any

misinterpretation by any end user.

4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications

transparently to the maximum extent possible in their national and regional publications. Any divergence

between any IEC Publication and the corresponding national or regional publication shall be clearly indicated in

the latter.

5) IEC itself does not provide any attestation of conformity. Independent certification bodies provide conformity

assessment services and, in some areas, access to IEC marks of conformity. IEC is not responsible for any

services carried out by independent certification bodies.

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

7) No liability shall attach to IEC or its directors, employees, servants or agents including individual experts and

members of its technical committees and IEC National Committees for any personal injury, property damage or

other damage of any nature whatsoever, whether direct or indirect, or for costs (including legal fees) and

expenses arising out of the publication, use of, or reliance upon, this IEC Publication or any other IEC

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 62343-3-3 has been prepared by subcommittee 86C: Fibre optic

systems and active devices, of IEC technical committee 86: Fibre optics.
The text of this standard is based on the following documents:
CDV Report on voting
86C/1156/CDV 86C/1214/RVC

Full information on the voting for the approval of this standard 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.

---------------------- Page: 9 ----------------------
SIST EN 62343-3-3:2014
– 4 – IEC 62343-3-3:2014 © IEC 2014

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 web site under "http://webstore.iec.ch" in the data

related to the specific publication. At this date, the publication will be
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.
---------------------- Page: 10 ----------------------
SIST EN 62343-3-3:2014
IEC 62343-3-3:2014 © IEC 2014 – 5 –
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.
---------------------- Page: 11 ----------------------
SIST EN 62343-3-3:2014
– 6 – IEC 62343-3-3:2014 © IEC 2014
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 included for detailed product specifications or

performance specifications. However, specification parameters specified in this standard shall

not be removed from the detail product specifications or performance specifications.

The technical information regarding wavelength selective switches, and their applications in

DWDM systems will be described in IEC TR 62343-6-4, currently under consideration.

2 Normative references

The following documents, in whole or in part, are normatively referenced in this document and

are indispensable for its application. 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 and

repeatability of the attenuation settings of a variable 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
---------------------- Page: 12 ----------------------
SIST EN 62343-3-3:2014
IEC 62343-3-3:2014 © IEC 2014 – 7 –

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 passive component 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 62343-4-1, Dynamic modules – Part 4-1: Software and hardware interface standards –

1x9 wavelength selective switch

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 apply.
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.

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
___________
Under consideration.
---------------------- Page: 13 ----------------------
SIST EN 62343-3-3:2014
– 8 – IEC 62343-3-3:2014 © IEC 2014
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

nomi

f = (f – ∆f ) to f = (f + ∆f ), where ∆f is the maximum channel central frequency deviation.

imin nomi 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

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;
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

(where i ≠ j) as the minimum wavelength range centred about the operating wavelength λ within which the

variation of a is less than X dB. The minimum wavelength range is determined considering thermal wavelength

shift, 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).

---------------------- Page: 14 ----------------------
SIST EN 62343-3-3:2014
IEC 62343-3-3:2014 © IEC 2014 – 9 –
ij Centre wavelength shift
Longer centre
wavelength
Shorter centre wavelength
X dB
X dB
X dB bandwidth
Wavelength
IEC 1195/14
Figure 1 – Illustration of X-dB bandwidth
3.11
return loss

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;
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 isolation wavelength range for isolated port pair. Isolation is positive value in dB.

Optical attenuation (dB)
---------------------- Page: 15 ----------------------
SIST EN 62343-3-3:2014
– 10 – IEC 62343-3-3:2014 © IEC 2014
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)
iox
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
---------------------- Page: 16 ----------------------
SIST EN 62343-3-3:2014
IEC 62343-3-3:2014 © IEC 2014 – 11 –
Non-adjacent Adjacent channel Channel centre Adjacent channel Non-adjacent
channel centre centre frequency centre frequency channel centre
frequency
frequency (wavelength) (wavelength) (wavelength) frequency
(wavelength) (wavelength)
iox
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 defined as
 
 
 
t (λ )
ij h
XT =−10×Log
 
tot
 
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;

λ are the nominal isolation wavelengths (frequencies) for the same pair of ports.

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
---------------------- Page: 17 ----------------------
SIST EN 62343-3-3:2014
– 12 – IEC 62343-3-3:2014 © IEC 2014

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-b
...

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