SIST EN IEC 60869-1:2019

Fibre optic interconnecting devices and passive components - Fibre optic passive power control devices - Part 1: Generic specification (IEC 60869-1:2018)

This part of IEC 60869 applies to fibre optic passive power control devices. These have all of
the following general features:
– they are passive in that they contain no optoelectronic or other transducing elements;
– they have two ports for the transmission of optical power and control of the transmitted
power in a fixed or variable fashion;
– the ports are non-connectorized optical fibre pigtails, connectorized optical fibres or
receptacles.
This document establishes generic requirements for the following passive optical devices:
– optical attenuator;
– optical fuse;
– optical power limiter.
This document also provides generic information including terminology for the IEC 61753-05x
series. Published IEC 61753-05x series documents are listed in Bibliography.

Lichtwellenleiter - Verbindungselemente und passive Bauteile - Passive Bauteile zur Leistungsbegrenzung - Teil 1: Fachgrundspezifikation (IEC 60869-1:2018)

Dispositifs d’interconnexion et composants passifs à fibres optiques - Dispositifs à fibres optiques passifs de contrôle de la puissance - Partie 1: Spécification générique (IEC 60869-1:2018)

IEC 60869-1:2018 est disponible sous forme de IEC 60869-1:2018 RLV qui contient la Norme internationale et sa version Redline, illustrant les modifications du contenu technique depuis l'édition précédente.

L'IEC 60869-1:2018 s'applique aux dispositifs fibroniques passifs de contrôle de la puissance. Ceux-ci présentent toutes les caractéristiques générales suivantes:
– ils sont passifs dans le sens où ils ne contiennent aucun élément optoélectronique ou autre élément transducteur;
– ils disposent de deux ports pour la transmission de la puissance optique et ils contrôlent l'énergie transmise de manière fixe ou variable;
– les ports sont des fibres amorces optiques dépourvues de connecteurs, des fibres optiques munies de connecteurs ou des embases.
Le présent document établit les exigences génériques pour les dispositifs optiques passifs suivants:
– affaiblisseur optique,
– fusible optique,
– limiteur de puissance optique.
Le présent document prévoit également l'information générique y compris la terminologie  pour la série IEC 61753-05x. Les publications de la série IEC 61753-05x sont indiquées dans la Bibliographie.
Cette cinquième édition annule et remplace la quatrième édition parue en 2012 et constitue une révision technique.  Cette édition inclut les modifications techniques majeures suivantes par rapport à l'édition précédente:
a) les termes et définitions ont été revus;
b) l'exigence concernant le système IEC 'd'évaluation de la qualité a été revue;
c) l'article concernant les procédures d'assurance de la qualité a été supprimé;
d) l'Annexe G, concernant les informations techniques des affaiblisseurs optiques variables, a été ajoutée.
Mots-clés: dispositifs fibroniques passifs de contrôle de la puissance

Optični spojni elementi in pasivne komponente - Pasivne optične naprave za krmiljenje moči - 1. del: Splošna specifikacija (IEC 60869-1:2018)

Ta del standarda IEC 60869 se uporablja za pasivne optične naprave za krmiljenje moči. Ti elementi imajo vse naslednje splošne značilnosti:
– so pasivni in ne vsebujejo nobenih optoelektronskih ali drugih prevodnih elementov;
– imajo dvoje vrat za prenos optične moči in nadzirajo preneseno
moč na enoten ali spremenljiv način;
– vrata so zaključni kabli iz optičnih vlaken brez konektorjev ali
z njimi oziroma spojniki.
Dokument uvaja splošne zahteve za naslednje pasivne optične naprave:
– optični atenuator;
– optična varovalka;
– omejevalnik optične moči.
Ta dokument poleg tega vsebuje splošne informacije, vključno s terminologijo za skupino standardov
IEC 61753-05x. Objavljeni dokumenti skupine IEC 61753-05x so navedeni v bibliografiji.

General Information

• Status: Published
• Publication Date: 10-Jan-2019
• ICS: 33.180.20 - Fibre optic interconnecting devices
• Technical Committee: MOC - Mobile Communications
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 03-Jan-2019
• Due Date: 10-Mar-2019
• Completion Date: 11-Jan-2019
• Ref Project: EN IEC 60869-1:2018 - Fibre optic interconnecting devices and passive components - Fibre optic passive power control devices - Part 1: Generic specification

Relations

• Revised: SIST EN 60869-1:2013 - Fibre optic interconnecting devices and passive components - Fibre optic passive power control devices - Part 1: Generic specification
• Effective Date: 04-Jul-2017
• Replaces: SIST EN 60869-1:2013 - Fibre optic interconnecting devices and passive components - Fibre optic passive power control devices - Part 1: Generic specification
• Effective Date: 25-Dec-2018

Standards Content (Sample)

SLOVENSKI STANDARD
SIST EN IEC 60869-1:2019
01-marec-2019
1DGRPHãþD
SIST EN 60869-1:2013
2SWLþQLVSRMQLHOHPHQWLLQSDVLYQHNRPSRQHQWH3DVLYQHRSWLþQHQDSUDYH]D
NUPLOMHQMHPRþLGHO6SORãQDVSHFLILNDFLMD,(&
Fibre optic interconnecting devices and passive components - Fibre optic passive power
control devices - Part 1: Generic specification (IEC 60869-1:2018)
Lichtwellenleiter - Verbindungselemente und passive Bauteile - Passive Bauteile zur
Leistungsbegrenzung - Teil 1: Fachgrundspezifikation (IEC 60869-1:2018)
Dispositifs d’interconnexion et composants passifs à fibres optiques - Dispositifs à fibres
optiques passifs de contrôle de la puissance - Partie 1: Spécification générique (IEC
60869-1:2018)
Ta slovenski standard je istoveten z: EN IEC 60869-1:2018
ICS:
33.180.20 3RYH]RYDOQHQDSUDYH]D Fibre optic interconnecting
RSWLþQDYODNQD devices
SIST EN IEC 60869-1:2019 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST EN IEC 60869-1:2019

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SIST EN IEC 60869-1:2019


EUROPEAN STANDARD EN IEC 60869-1

NORME EUROPÉENNE

EUROPÄISCHE NORM
December 2018
ICS 33.180.20 Supersedes EN 60869-1:2013
English Version
Fibre optic interconnecting devices and passive components -
Fibre optic passive power control devices - Part 1: Generic
specification
(IEC 60869-1:2018)
Dispositifs d'interconnexion et composants passifs Lichtwellenleiter - Verbindungselemente und passive
fibroniques - Dispositifs fibroniques passifs de contrôle de la Bauteile - Passive Bauteile zur Leistungsbegrenzung - Teil
puissance - Partie 1: Spécification générique 1: Fachgrundspezifikation
(IEC 60869-1:2018) (IEC 60869-1:2018)
This European Standard was approved by CENELEC on 2018-12-20. 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, Serbia, 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: Rue de la Science 23, B-1040 Brussels
© 2018 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
 Ref. No. EN IEC 60869-1:2018 E

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SIST EN IEC 60869-1:2019
EN IEC 60869-1:2018 (E)
European foreword
The text of document 86B/4139/FDIS, future edition 5 of IEC 60869-1, prepared by SC 86B "Fibre
optic interconnecting devices and passive components" of IEC/TC 86 "Fibre optics" was submitted to
the IEC-CENELEC parallel vote and approved by CENELEC as EN IEC 60869-1:2018.
The following dates are fixed:
• latest date by which the document has to be implemented at national (dop) 2019-09-21
level by publication of an identical national standard or by endorsement
• latest date by which the national standards conflicting with the (dow) 2019-12-21
document have to be withdrawn

This document supersedes EN 60869-1:2013.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CENELEC shall not be held responsible for identifying any or all such patent rights.
Endorsement notice
The text of the International Standard IEC 60869-1:2018 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 60874 (series) NOTE Harmonized as EN 60874 (series)
IEC 61073-1 NOTE Harmonized as EN 61073-1
IEC 61300-1 NOTE Harmonized as EN 61300-1
IEC 61300-2 (series) NOTE Harmonized as EN 61300-2 (series)
IEC 61300-3 (series) NOTE Harmonized as EN 61300-3 (series)
IEC 61753 (series) NOTE Harmonized as EN 61753 (series)
IEC 61753-051-3 NOTE Harmonized as EN 61753-051-3
IEC 61753-052-3 NOTE Harmonized as EN 61753-052-3
IEC 61753-052-6 NOTE Harmonized as EN 61753-052-6
IEC 61753-053-2 NOTE Harmonized as EN 61753-053-2
IEC 61753-056-2 NOTE Harmonized as EN 61753-056-2
2

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SIST EN IEC 60869-1:2019
EN IEC 60869-1:2018 (E)
IEC 61753-057-2 NOTE Harmonized as EN 61753-057-2
IEC 61753-058-2 NOTE Harmonized as EN 61753-058-2
IEC 61753-059-2 NOTE Harmonized as EN 61753-059-2
IEC 61754 (series) NOTE Harmonized as EN 61754 (series)
IEC 61754-2 NOTE Harmonized as EN 61754-2
IEC 61754-4 NOTE Harmonized as EN 61754-4
IEC 61754-13 NOTE Harmonized as EN 61754-13
IEC 61754-20 NOTE Harmonized as EN 61754-20
IEC 61755 (series) NOTE Harmonized as EN 61755 (series)
IEC 62005 (series) NOTE Harmonized as EN IEC 62005 (series)

3

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SIST EN IEC 60869-1:2019
EN IEC 60869-1:2018 (E)
Annex ZA
(normative)

Normative references to international publications
with their corresponding European publications
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.
NOTE 1  Where 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 60027 series Letter symbols to be used in electrical EN 60027 series
technology
IEC 60050-731 -  International Electrotechnical Vocabulary - - -
Chapter 731: Optical fibre communication
IEC 60617 -  Graphical symbols for diagrams - -
IEC 60695-11-5 -  Fire hazard testing - Part 11-5: Test flames - EN 60695-11-5 -
Needle-flame test method - Apparatus,
confirmatory test arrangement and guidance
IEC 60825 series Radiation safety of laser products, equipment - -
classification, requirements and user's guide
IEC 61300 series Fibre optic interconnecting devices and passive EN 61300 series
components - Basic test and measurement
procedures
IEC/TS 62627-09 -  Fibre optic interconnecting devices and passive - -
components - Vocabulary for passive optical
devices
ISO 129-1 -  Technical drawings - Indication of dimensions - -
and tolerances - Part 1: General principles
ISO 286-1 -  Geometrical product specifications (GPS) - ISO EN ISO 286-1 -
code system for tolerances on linear sizes -
Part 1: Basis of tolerances, deviations and fits
ISO 1101 -  Geometrical product specifications (GPS) - EN ISO 1101 -
Geometrical tolerancing - Tolerances of form,
orientation, location and run-out
ISO 8601 -  Data elements and interchange formats - - -
Information interchange - Representation of
dates and times

4

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SIST EN IEC 60869-1:2019




IEC 60869-1

®


Edition 5.0 2018-11




INTERNATIONAL



STANDARD




NORME



INTERNATIONALE
colour

inside










Fibre optic interconnecting devices and passive components – Fibre optic

passive power control devices –

Part 1: Generic specification




Dispositifs d'interconnexion et composants passifs fibroniques – Dispositifs

fibroniques passifs de contrôle de la puissance –


Partie 1: Spécification générique













INTERNATIONAL

ELECTROTECHNICAL

COMMISSION


COMMISSION

ELECTROTECHNIQUE


INTERNATIONALE




ICS 33.180.20 ISBN 978-2-8322-6177-4




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

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SIST EN IEC 60869-1:2019
– 2 – IEC 60869-1:2018 © IEC 2018
CONTENTS
FOREWORD . 4
1 Scope . 6
2 Normative references . 6
3 Terms and definitions . 7
3.1 Component terms. 7
3.2 Performance terms . 8
4 Description of devices . 9
4.1 Optical attenuator . 9
4.2 Optical fuse . 10
4.3 Optical power limiter . 11
5 Requirements . 12
5.1 Classification . 12
5.1.1 General . 12
5.1.2 Type . 13
5.1.3 Wavelength band . 13
5.1.4 Style . 13
5.1.5 Variant . 14
5.1.6 Assessment level . 14
5.1.7 Normative reference extensions. 15
5.2 Documentation . 15
5.2.1 Symbols . 15
5.2.2 Specification system . 16
5.2.3 Drawings . 17
5.2.4 Tests and measurements . 17
5.2.5 Test data sheets . 17
5.2.6 Instructions for use . 18
5.3 Standardization system . 18
5.3.1 Interface standards . 18
5.3.2 Performance standards . 18
5.3.3 Reliability standards . 19
5.3.4 Interlinking . 19
5.4 Design and construction . 21
5.4.1 Materials . 21
5.4.2 Workmanship . 21
5.5 Quality . 21
5.6 Performance . 21
5.7 Identification and marking . 21
5.7.1 General . 21
5.7.2 Variant identification number . 21
5.7.3 Component marking . 21
5.7.4 Package marking . 22
5.8 Packaging . 22
5.9 Storage conditions . 22
5.10 Safety . 22
Annex A (informative) Optical fuse configuration and performance examples . 23
Annex B (informative) Optical fuse application notes . 25

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SIST EN IEC 60869-1:2019
IEC 60869-1:2018 © IEC 2018 – 3 –
Annex C (informative) Optical power limiter configuration and performance examples . 26
Annex D (informative) Optical power limiter application notes . 29
Annex E (informative) Fixed optical attenuator application note . 30
Annex F (informative) Variable, manual or electrical, optical attenuator application
note . 31
Annex G (informative) Example of technology of variable optical attenuators . 33
G.1 Example technology of micro electromechanical system (MEMS) based VOA . 33
G.2 Example technology of planar lightwave circuit (PLC) based and
thermo-optic (TO) based VOA . 33
G.3 Example technology of magnet-optic (MO) based VOA . 34
Bibliography . 36

Figure 1 – Fixed optical attenuator operation curve . 10
Figure 2 – VOA operation curve . 10
Figure 3 – Optical fuse operation curve . 11
Figure 4 – Optical power limiter operation curve . 12
Figure 5 – Configuration A . 13
Figure 6 – Configuration B . 13
Figure 7 – Configuration C . 14
Figure 8 – Standardization structure . 20
Figure A.1 – Optical fuse, non-connectorised style) . 23
Figure A.2 – Optical fuse, plug-receptacle style (LC) . 23
Figure A.3 – Response time curve of an optical fuse . 24
Figure A.4 – Optical fuse, power threshold approx. 30 dBm (1 W), output power drop at
threshold approx. 25 dB . 24
Figure B.1 – Placement of an optical fuse . 25
Figure C.1 – Optical power limiter, non-connectorised style . 26
Figure C.2 – Optical power limiter, plug-receptacle style (LC) . 26
Figure C.3 – Optical power limiter – Experimental . 26
Figure C.4 – Schematic optical power limiter response time. Input pulse is 1 ms long . 27
Figure C.5 – Schematic power definitions . 28
Figure C.6 – Optical power limiter, input power definitions . 28
Figure D.1 – Optical power limiter and optical fuse, combined, operation curve . 29
Figure E.1 – Placement of a fixed optical attenuator . 30
Figure F.1 – Placement of a variable, manual or electrical, optical attenuator . 32
Figure G.1 – Example technology of MEMS based VOA . 33
Figure G.2 – Example technology of PLC-TO based VOA . 34
Figure G.3 – The relation of phase changes and attenuation . 34
Figure G.4 – Example technology of MO based VOA . 35

Table 1 – Three-level IEC specification structure . 16
Table 2 – Standards interlink matrix . 20

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SIST EN IEC 60869-1:2019
– 4 – IEC 60869-1:2018 © IEC 2018
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
FIBRE OPTIC INTERCONNECTING DEVICES AND PASSIVE
COMPONENTS – FIBRE OPTIC PASSIVE POWER CONTROL DEVICES –

Part 1: Generic specification

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 60869-1 has been prepared by subcommittee 86B: Fibre optic
interconnecting devices and passive components, of IEC TC 86: Fibre optics.
This fifth edition cancels and replaces the fourth edition published in 2012 and constitutes a
technical revision.
This edition includes the following significant technical changes with respect to the previous
edition:
a) the terms and definitions have been reviewed;
b) the requirement concerning the IEC Quality Assessment System has been reviewed;
c) the clause concerning quality assessment procedures has been deleted;
d) Annex G, relating to technical information on variable optical attenuators, has been added.

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SIST EN IEC 60869-1:2019
IEC 60869-1:2018 © IEC 2018 – 5 –
The text of this International Standard is based on the following documents:
FDIS Report on voting
86B/4139/FDIS 86B/4144/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.
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.

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SIST EN IEC 60869-1:2019
– 6 – IEC 60869-1:2018 © IEC 2018
FIBRE OPTIC INTERCONNECTING DEVICES AND PASSIVE
COMPONENTS – FIBRE OPTIC PASSIVE POWER CONTROL DEVICES –

Part 1: Generic specification


1 Scope
This part of IEC 60869 applies to fibre optic passive power control devices. These have all of
the following general features:
– they are passive in that they contain no optoelectronic or other transducing elements;
– they have two ports for the transmission of optical power and control of the transmitted
power in a fixed or variable fashion;
– the ports are non-connectorized optical fibre pigtails, connectorized optical fibres or
receptacles.
This document establishes generic requirements for the following passive optical devices:
– optical attenuator;
– optical fuse;
– optical power limiter.
This document also provides generic information including terminology for the IEC 61753-05x
series. Published IEC 61753-05x series documents are listed in Bibliography.
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 60027 (all parts), Letter symbols to be used in electrical technology
IEC 60050-731, International Electrotechnical Vocabulary – Chapter 731: Optical fibre
communication (available at www.electropedia.org)
IEC 60617, Graphical symbols for diagrams (available at http://std.iec.ch/iec60617)
IEC 60695-11-5, Fire hazard testing – Part 11-5: Test flames – Needle-flame test method –
Apparatus, confirmatory test arrangement and guidance
IEC 60825 (all parts), Safety of laser products
IEC 61300 (all parts), Fibre optic interconnecting devices and passive components – Basic
test and measurement procedures
IEC TS 62627-09, Fibre optic interconnecting devices and passive components – Vocabulary
for passive optical devices
ISO 129-1, Technical product documentation (TPD) – Presentation of dimensions and
tolerances

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SIST EN IEC 60869-1:2019
IEC 60869-1:2018 © IEC 2018 – 7 –
ISO 286-1, Geometrical product specifications (GPS) – ISO code system for tolerances on
linear sizes – Part 1: Basis of tolerances, deviations and fits
ISO 1101, Geometrical product specifications (GPS) – Geometrical tolerancing – Tolerances
of form, orientation, location and run-out
ISO 8601, Data elements and interchange formats – Information interchange –
Representation of dates and times
3 Terms and definitions
For the purposes of this document, the terms and definitions given in IEC 60050-731,
IEC TS 62627-09 and the following 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 Component terms
3.1.1
fibre optic passive power control device
passive optical device (component) which controls a transmittance with a designed
wavelength-independent transfer coefficient
Note 1 to entry: The transfer coefficient may be controlled for all intensity of input power or for input power over a
threshold power.
3.1.2
optical attenuator
passive optical device (component), which produces a wavelength-independent controlled
signal attenuation in an optical fibre transmission line
Note 1 to entry: An attenuator is intended to be wavelength independent.
3.1.3
fixed optical attenuator
optical attenuator in which attenuation is constant
3.1.4
variable optical attenuator
VOA
optical attenuator in which attenuation is controllable
Note 1 to entry: Attenuation values of variable optical attenuators are generally controlled by manual or electric
means.
Note 2 to entry: This note applies to the French language only.
3.1.5
optical fuse
fibre optic passive power control device, which produces controlled, permanent, signal
blocking for higher optical power than a predetermined power threshold in an optical fibre
transmission line

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SIST EN IEC 60869-1:2019
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3.1.6
optical power limiter
fibre optic passive power control device that regulates the optical power in fibres, producing a
controlled, constant optical output power of optical limit power, as a result of varying optical
input power higher than the input optical limit power
3.1.7
plug-receptacle style device
fibre optic device having a combination of two interfacing features, a plug at one end and a
receptacle at the other
3.2 Performance terms
3.2.1
optical fuse power threshold
P
th
optical input power, into an optical fuse, in which the optical
...