IEC 61753-031-3:2009

Fibre optic interconnecting devices and passive components performance standard - Part 031-3: Non-connectorized single-mode 1xN and 2xN non-wavelength-selective branching devices (NWBD) for Category U - Uncontrolled environment

IEC 61753-031-3:2009 contains the minimum initial tests and measurement requirements and severities which a non-wavelength selective branching device (NWBD) should satisfy in order to be categorized as meeting the requirements of Category U (uncontrolled environment) as defined in Annex A of IEC 61753-1. Keywords: non-wavelength selective branching device (NWBD), Category U (uncontrolled environment)

Norme de performance des dispositifs d'interconnexion et composants passifs à fibres optiques - Partie 031-3: Dispositifs de couplage indépendants de la longueur d'onde 1xN et 2xN en unimodal non connectorisés pour la catégorie U - Environnement non contrôlé

L'IEC 61753-031-3:2009 contient les exigences de mesure et d'essai initiales minimales et les sévérités auxquelles il convient qu'un dispositif de couplage indépendant de la longueur d'onde (NWBD) satisfasse afin d'être classé dans la catégorie U (environnement non contrôlé), selon la définition de l'Annexe A de la CEI 61753-1. Mots clés: couplage indépendant de la longueur d'onde (NWBD), catégorie U (environnement non contrôlé)

General Information

• Status: Published
• Publication Date: 10-Feb-2009
• ICS: 33.180.10 - Fibres and cables
• Technical Committee: SC 86B - Fibre optic interconnecting devices and passive components
• Drafting Committee: WG 7 - TC 86/SC 86B/WG 7
• Current Stage: DELPUB - Deleted Publication
• Completion Date: 16-Dec-2014

Relations

• Revised: IEC 61753-031-3:2014 - Fibre optic interconnecting devices and passive components - Performance standard - Part 031-3: Non-connectorized single-mode 1×N and 2×N non-wavelength-selective branching devices for Category U - Uncontrolled environment
• Effective Date: 05-Sep-2023

Standards Content (Sample)

IEC 61753-031-3
®
Edition 1.0 2009-02
INTERNATIONAL
STANDARD


Fibre optic interconnecting devices and passive components performance
standard –
Part 031-3: Non-connectorized single-mode 1×N and 2×N non-wavelength-
selective branching devices (NWBD) for Category U – Uncontrolled environment



IEC 61753-031-3:2009(E)

---------------------- Page: 1 ----------------------
THIS PUBLICATION IS COPYRIGHT PROTECTED
Copyright © 2009 IEC, Geneva, Switzerland

All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form
or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from
either IEC or IEC's member National Committee in the country of the requester.
If you have any questions about IEC copyright or have an enquiry about obtaining additional rights to this publication,
please contact the address below or your local IEC member National Committee for further information.

IEC Central Office
3, rue de Varembé
CH-1211 Geneva 20
Switzerland
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About the IEC
The International Electrotechnical Commission (IEC) is the leading global organization that prepares and publishes
International Standards for all electrical, electronic and related technologies.

About IEC publications
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---------------------- Page: 2 ----------------------
IEC 61753-031-3
®
Edition 1.0 2009-02
INTERNATIONAL
STANDARD


Fibre optic interconnecting devices and passive components performance
standard –
Part 031-3: Non-connectorized single-mode 1×N and 2×N non-wavelength-
selective branching devices (NWBD) for Category U – Uncontrolled environment


INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
PRICE CODE
Q
ICS 33.180.10 ISBN 978-2-88910-555-7
® Registered trademark of the International Electrotechnical Commission

---------------------- Page: 3 ----------------------
– 2 – 61753-031-3 © IEC:2009(E)
CONTENTS
FOREWORD.3
1 Scope.5
2 Normative references .5
3 Test.6
4 Test report.7
5 Performance requirements .7
5.1 Dimensions .7
5.2 Sample size .7
5.3 Test details and requirements .7
Annex A (informative) Examples of attenuation requirements of 1 × N and 2 × N
branching devices.15
Annex B (normative) Sample size .16
Bibliography.17

Table 1 – Test details and requirements .8
Table A.1 – Attenuation and uniformity requirements of balanced bidirectional
branching devices having the most common port configurations for class FBT.15
Table A.2 – Attenuation and uniformity requirements of balanced bidirectional
branching devices having the most common port configurations for class PLC.15
Table A.3 – Attenuation requirements of 1 × 2 and 2 × 2 unbalanced branching devices
having the most common port configurations .15
Table B.1 – Sample size for each test.16

---------------------- Page: 4 ----------------------
61753-031-3 © IEC:2009(E) – 3 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________

FIBRE OPTIC INTERCONNECTING DEVICES AND PASSIVE
COMPONENTS PERFORMANCE STANDARD –

Part 031-3: Non-connectorized single-mode 1×N and 2×N
non-wavelength-selective branching devices (NWBD) for Category U –
Uncontrolled environment


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 provides no marking procedure to indicate its approval and cannot be rendered responsible for any
equipment declared to be in conformity with an IEC Publication.
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 61753-031-3 has been prepared by subcommittee 86B: Fibre optic
interconnecting devices and passive components, of IEC technical committee 86: Fibre optics.
The text of this standard is based on the following documents:
FDIS Report on voting
86B/2789/FDIS 86B/2821/RVD

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: 5 ----------------------
– 4 – 61753-031-3 © IEC:2009(E)
A list of all the parts in the IEC 61753 series, under the general title Fibre optic
interconnecting devices and passive components performance standard, can be found on the
IEC website.
The committee has decided that the contents of this publication will remain unchanged until
the maintenance result 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.
A bilingual version of this publication may be issued at a later date.

---------------------- Page: 6 ----------------------
61753-031-3 © IEC:2009(E) – 5 –
FIBRE OPTIC INTERCONNECTING DEVICES AND PASSIVE
COMPONENTS PERFORMANCE STANDARD –

Part 031-3: Non-connectorized single-mode 1×N and 2×N
non-wavelength-selective branching devices (NWBD) for Category U –
Uncontrolled environment



1 Scope
This part of IEC 61753 contains the minimum initial tests and measurement requirements and
severities which a non-wavelength selective branching device (NWBD) should satisfy in order
to be categorized as meeting the requirements of Category U (uncontrolled environment) as
defined in Annex A of IEC 61753-1.
This standard takes into account two technologies present on the market: the Fused Biconical
Taper (FBT) and the Planar Lightwave Circuit (PLC). Requirements cover balanced,
bidirectional, non-connectorized, single-mode 1 × N and 2 × N non-wavelength-selective
branching devices for use in an IEC Category U environment (N is the number of output
ports), especially for Passive Optical Network (PON) application. The specifications of
unbalanced branching devices are limited to 1 × 2 and 2 × 2 devices because they are the
most commonly used.
2 Normative references
The following normative documents are indispensable for the application 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 60793-2-50: Optical fibres – Part 2: Product specifications – Sectional specification for
class B single-mode fibres
IEC 61300-2-1, Fibre optic interconnecting devices and passive components – Basic test and
measurement procedures – Part 2-1: Tests – Vibration (sinusoidal)
IEC 61300-2-4, Fibre optic interconnecting devices and passive components – Basic test and
measurement procedures – Part 2-4: Tests – Fibre/cable retention
IEC 61300-2-5, Fibre optic interconnecting devices and passive components – Basic test and
measurement procedures – Part 2-5: Tests – Torsion/Twist
IEC 61300-2-9, Fibre optic interconnecting devices and passive components – Basic test and
measurement procedures – Part 2-9: Tests – Shock
IEC 61300-2-12, Fibre optic interconnecting devices and passive components – Basic test
and measurement procedures – Part 2-12: Tests – Impact
IEC 61300-2-14, Fibre optic interconnecting devices and passive components – Basic test
and measurement procedures – Part 2-14: Tests – Optical power handling and damage
threshold characterization
IEC 61300-2-17, Fibre optic interconnecting devices and passive components – Basic test
and measurement procedures – Part 2-17: Tests – Cold

---------------------- Page: 7 ----------------------
– 6 – 61753-031-3 © IEC:2009(E)
IEC 61300-2-18, Fibre optic interconnecting devices and passive components – Basic test
and measurement procedures – Part 2-18: Tests – Dry heat – High temperature endurance
IEC 61300-2-19, Fibre optic interconnecting devices and passive components – Basic test
and measurement procedures – Part 2-19: Tests – Damp heat (steady state)
IEC 61300-2-22, Fibre optic interconnecting devices and passive components – Basic test
and measurement procedures – Part 2-19: Tests – Change of temperature
IEC 61300-2-42, Fibre optic interconnecting devices and passive components – Basic test
and measurement procedures – Part 2-19: Tests – Static side load for connectors
IEC 61300-2-44, Fibre optic interconnecting devices and passive components – Basic test
and measurement procedures – Part 2-19: Tests – Flexing of the strain relief of fibre optic
devices
IEC 61300-2-46 Fibre optic interconnecting devices and passive components – Basic test and
measurement procedures – Part 2-46: Tests – Damp heat, cyclic
IEC 61300-3-2, Fibre optic interconnecting devices and passive components – Basic test and
measurement procedures – Part 3-2: Examinations and measurements – Polarization
dependence of attenuation in a single-mode fibre optic device
IEC 61300-3-3, Fibre optic interconnecting devices and passive components – Basic test and
measurement procedures – Part 3-3: Examinations and measurements – Active monitoring of
changes in attenuation and return loss
IEC 61300-3-6, Fibre optic interconnecting devices and passive components – Basic test and
measurement procedures – Part 3-6: Examinations and measurements – Return loss
IEC 61300-3-7, Fibre optic interconnecting devices and passive components – Basic test and
measurement procedures – Part 3-7: Examinations and measurements – Wavelength
dependence of attenuation and return loss
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 61753-2-1: Fibre optic interconnecting devices and passive components performance
standard – Part 2-1: Fibre optic connectors terminated on single-mode fibre for category U –
Uncontrolled environment
3 Test
All test methods are selected from the IEC 61300 series of standards.
The samples for tests shall be terminated onto single-mode fibres according to type B1.1 of
IEC 60793-2-50 in either coated fibres (primary and secondary) or reinforced cable format.
All tests shall be carried out to validate performance over the full wavelength range of the
optical fibre, 1 260 nm to 1 650 nm. However, from an application and laser wavelength point
of view, more limited bands can be considered in the test, such as:
a) Spectral bands I:
1 260 nm to 1 360 nm
1 480 nm to 1 500 nm

---------------------- Page: 8 ----------------------
61753-031-3 © IEC:2009(E) – 7 –
b) Spectral bands II:
1 615 nm to 1 635 nm (1 625 nm OTDR band)
1 640 nm to 1 660 nm (1 650 nm OTDR band).
4 Test report
Fully documented test reports and supporting evidence shall be prepared and be available for
inspection as evidence that the tests
...

IEC 61753-031-3
®

Edition 1.0 2009-02
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE


Fibre optic interconnecting devices and passive components performance
standard –
Part 031-3: Non-connectorized single-mode 1×N and 2×N non-wavelength-
selective branching devices (NWBD) for Category U –
Uncontrolled environment

Norme de performance des dispositifs d'interconnexion et composants passifs à
fibres optiques –
Partie 031-3: Dispositifs de couplage indépendants de la longueur d’onde 1×N et
2×N en unimodal non connectorisés pour la catégorie U – Environnement non
contrôlé

IEC 61753-031-3:2009-02(en-fr)

---------------------- Page: 1 ----------------------
THIS PUBLICATION IS COPYRIGHT PROTECTED
Copyright © 2009 IEC, Geneva, Switzerland

All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form
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International Standards for all electrical, electronic and related technologies.

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---------------------- Page: 2 ----------------------
IEC 61753-031-3

®


Edition 1.0 2009-02




INTERNATIONAL



STANDARD




NORME



INTERNATIONALE











Fibre optic interconnecting devices and passive components performance

standard –

Part 031-3: Non-connectorized single-mode 1×N and 2×N non-wavelength-


selective branching devices (NWBD) for Category U –

Uncontrolled environment




Norme de performance des dispositifs d'interconnexion et composants passifs

à fibres optiques –

Partie 031-3: Dispositifs de couplage indépendants de la longueur d’onde 1×N et

2×N en unimodal non connectorisés pour la catégorie U – Environnement non

contrôlé








INTERNATIONAL

ELECTROTECHNICAL

COMMISSION


COMMISSION

ELECTROTECHNIQUE

PRICE CODE
INTERNATIONALE

CODE PRIX Q


ICS 33.180.10 ISBN 978-2-8322-1474-9



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: 3 ----------------------
– 2 – IEC 61753-031-3:2009 © IEC 2009
CONTENTS
FOREWORD . 3
1 Scope . 5
2 Normative references . 5
3 Test . 6
4 Test report. 7
5 Performance requirements . 7
5.1 Dimensions . 7
5.2 Sample size . 7
5.3 Test details and requirements . 7
Annex A (informative) Examples of attenuation requirements of 1 × N and 2 × N
branching devices . 15
Annex B (normative) Sample size . 16
Bibliography . 17

Table 1 – Test details and requirements . 8
Table A.1 – Attenuation and uniformity requirements of balanced bidirectional
branching devices having the most common port configurations for class FBT . 15
Table A.2 – Attenuation and uniformity requirements of balanced bidirectional
branching devices having the most common port configurations for class PLC . 15
Table A.3 – Attenuation requirements of 1 × 2 and 2 × 2 unbalanced branching devices
having the most common port configurations . 15
Table B.1 – Sample size for each test . 16

---------------------- Page: 4 ----------------------
IEC 61753-031-3:2009 © IEC 2009 – 3 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________

FIBRE OPTIC INTERCONNECTING DEVICES AND PASSIVE
COMPONENTS PERFORMANCE STANDARD –

Part 031-3: Non-connectorized single-mode 1×N and 2×N
non-wavelength-selective branching devices (NWBD) for Category U –
Uncontrolled environment


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 provides no marking procedure to indicate its approval and cannot be rendered responsible for any
equipment declared to be in conformity with an IEC Publication.
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 61753-031-3 has been prepared by subcommittee 86B: Fibre optic
interconnecting devices and passive components, of IEC technical committee 86: Fibre optics.
This bilingual version (2014-03) corresponds to the monolingual English version, published in
2009-02.
The text of this standard is based on the following documents:
FDIS Report on voting
86B/2789/FDIS 86B/2821/RVD

Full information on the voting for the approval of this standard can be found in the report on
voting indicated in the above table.

---------------------- Page: 5 ----------------------
– 4 – IEC 61753-031-3:2009 © IEC 2009
The French version of this standard has not been voted upon.
This publication has been drafted in accordance with the ISO/IEC Directives, Part 2.
A list of all the parts in the IEC 61753 series, under the general title Fibre optic
interconnecting devices and passive components performance standard, can be found on the
IEC website.
The committee has decided that the contents of this publication will remain unchanged until
the maintenance result 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: 6 ----------------------
IEC 61753-031-3:2009 © IEC 2009 – 5 –
FIBRE OPTIC INTERCONNECTING DEVICES AND PASSIVE
COMPONENTS PERFORMANCE STANDARD –

Part 031-3: Non-connectorized single-mode 1×N and 2×N
non-wavelength-selective branching devices (NWBD) for Category U –
Uncontrolled environment



1 Scope
This part of IEC 61753 contains the minimum initial tests and measurement requirements and
severities which a non-wavelength selective branching device (NWBD) should satisfy in order
to be categorized as meeting the requirements of Category U (uncontrolled environment) as
defined in Annex A of IEC 61753-1.
This standard takes into account two technologies present on the market: the Fused Biconical
Taper (FBT) and the Planar Lightwave Circuit (PLC). Requirements cover balanced,
bidirectional, non-connectorized, single-mode 1 × N and 2 × N non-wavelength-selective
branching devices for use in an IEC Category U environment (N is the number of output
ports), especially for Passive Optical Network (PON) application. The specifications of
unbalanced branching devices are limited to 1 × 2 and 2 × 2 devices because they are the
most commonly used.
2 Normative references
The following normative documents are indispensable for the application 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 60793-2-50: Optical fibres – Part 2: Product specifications – Sectional specification for
class B single-mode fibres
IEC 61300-2-1, Fibre optic interconnecting devices and passive components – Basic test and
measurement procedures – Part 2-1: Tests – Vibration (sinusoidal)
IEC 61300-2-4, Fibre optic interconnecting devices and passive components – Basic test and
measurement procedures – Part 2-4: Tests – Fibre/cable retention
IEC 61300-2-5, Fibre optic interconnecting devices and passive components – Basic test and
measurement procedures – Part 2-5: Tests – Torsion/Twist
IEC 61300-2-9, Fibre optic interconnecting devices and passive components – Basic test and
measurement procedures – Part 2-9: Tests – Shock
IEC 61300-2-12, Fibre optic interconnecting devices and passive components – Basic test
and measurement procedures – Part 2-12: Tests – Impact
IEC 61300-2-14, Fibre optic interconnecting devices and passive components – Basic test
and measurement procedures – Part 2-14: Tests – Optical power handling and damage
threshold characterization
IEC 61300-2-17, Fibre optic interconnecting devices and passive components – Basic test
and measurement procedures – Part 2-17: Tests – Cold

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– 6 – IEC 61753-031-3:2009 © IEC 2009
IEC 61300-2-18, Fibre optic interconnecting devices and passive components – Basic test
and measurement procedures – Part 2-18: Tests – Dry heat – High temperature endurance
IEC 61300-2-19, Fibre optic interconnecting devices and passive components – Basic test
and measurement procedures – Part 2-19: Tests – Damp heat (steady state)
IEC 61300-2-22, Fibre optic interconnecting devices and passive components – Basic test
and measurement procedures – Part 2-22: Tests – Change of temperature
IEC 61300-2-42, Fibre optic interconnecting devices and passive components – Basic test
and measurement procedures – Part 2-42: Tests – Static side load for connectors
IEC 61300-2-44, Fibre optic interconnecting devices and passive components – Basic test
and measurement procedures – Part 2-44: Tests – Flexing of the strain relief of fibre optic
devices
IEC 61300-2-46 Fibre optic interconnecting devices and passive components – Basic test and
measurement procedures – Part 2-46: Tests – Damp heat, cyclic
IEC 61300-3-2, Fibre optic interconnecting devices and passive components – Basic test and
measurement procedures – Part 3-2: Examinations and measurements – Polarization
dependence of attenuation in a single-mode fibre optic device
IEC 61300-3-3, Fibre optic interconnecting devices and passive components – Basic test and
measurement procedures – Part 3-3: Examinations and measurements – Active monitoring of
changes in attenuation and return loss
IEC 61300-3-6, Fibre optic interconnecting devices and passive components – Basic test and
measurement procedures – Part 3-6: Examinations and measurements – Return loss
IEC 61300-3-7, Fibre optic interconnecting devices and passive components – Basic test and
measurement procedures – Part 3-7: Examinations and measurements – Wavelength
dependence of attenuation and return loss
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 61753-2-1: Fibre optic interconnecting devices and passive components performance
standard – Part 2-1: Fibre optic connectors terminated on single-mode fibre for category U –
Uncontrolled environment
3 Test
All test methods are selected from the IEC 61300 series of standards.
The samples for tests shall be terminated onto single-mode fibres according to type B1.1 of
IEC 60793-2-50 in either coated fibres (primary and secondary) or reinforced cable format.
All tests shall be carried out to validate performance over the full wavelength range of the
optical fibre, 1 260 nm to 1 650 nm. However, from an application and laser wavelength point
of view, more limited bands can be considered in the test, such as:
a) Spectral bands I:
1 260 nm to 1 360 nm
1 480 nm to 1 500 nm

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IEC 61753-031-3:2009 © IEC 2009 – 7 –
b) Spectral bands II:
1 615 nm to 1 635 nm (1 625 nm OTDR band)
1 640 nm to 1 660 nm (1 650 nm OTDR band).
4 Test report
Fully documented test reports and supporting evidence shall be prepared and be available for
inspection as evidence that the tests have been carried out and complied with.
5 Performance requirements
5.1 Dimensions
Dimensions shall comply with either an appropriate IEC interface standard or a relevant
specification.
5.2 Sample size
Sample sizes for the tests are defined in Annex B.
5.3 Test details and requirements
Attenuation and return loss performances are given only for non-connectorized branching
devices. For connectorized components the connector performances shall be in compliance
with IEC 61753-2-1.
During the environmental tests where monitoring of the branching device is needed, all ports
of the device shall be controlled.

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– 8 – IEC 61753-031-3:2009 © IEC 2009

Table 1 – Test details and requirements
No. Tests Requirements Details
1 Attenuation (A) Configuration 1xN 2xN
Launch patchcord length: ≥ 2
m.
IEC 61300-3-7
Technology FBT PLC FBT PLC
Light source: unpolarized.
Balanced NWBD
Launch conditions: The
Spectral band I
A [dB] ≤ 0,1 + 3,6 log N A [dB] ≤ 1,2 + 3,3 log N A [dB] ≤ 0,4 + 3,6 log N A [dB] ≤ 1,5 + 3,3 log N
2 2 2 2 wavelength of the source shall
be longer than the cut-off
Spectral bands I
A [dB] ≤ 4 log N A [dB] ≤ 1,5 + 3,4 log N A [dB] ≤ 0,3 + 4 log N A [dB] ≤ 1,5 + 3,5 log N
2 2 2 2
wavelength of the fibre.
and II
Uncertainty: ± 0,05 dB or lower.
Unbalanced NWBD
The measurement should be
Spectral band I
performed with any combination
A [dB] ≤ 22 – 10,8log10P where P is the nominal percentage of power associated with one port of input/output and output/input
Spectral bands I
ports. The results should meet
and II
the requirements.

See Tables A.1 and A.2 for

examples
2 Uniformity (U) Configuration 1xN 2xN Same as above.
IEC 61300-3-7 Technology FBT PLC FBT PLC See Table A.3 for example
Balanced NWBD
Spectral band I N U [dB] ≤ 0,3 log N U [dB] ≤ 0,4 + 0,55 log N U [dB] ≤ 0,1 + 0,65 log N
U [dB] ≤ 0,1 + 0,55 log
2 2 2 2
Spectral bands I
U [dB] ≤ 0,3 +0,9 log N U [dB] ≤ 0,65 + 0,2 log N U [dB] ≤ 0,6 + 0,9 log N U [dB] ≤ 0,7 + 0,6log N
2 2 2 2
and II
Unbalanced NWBD
Spectral band I
A [dB] ≤ 22 – 10,8log P where P is the nominal percentage of power associated with one port
Spectral bands I 10
and II

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IEC 61753-031-3:2009 © IEC 2009 – 9 –
Table 1 (continued)
No. Tests Requirements Details
3 Directivity Same as in test No. 1.
≥55 dB

Source type : LD.
IEC 61300-3-20
Uncertainty: ± 1 dB or lower.
All ports not under test shall be
terminated to avoid unwanted reflections
contributing to the measurement.
The measurement should be made
between any pair of input/output ports
4 Return loss Same as in test No. 1.
≥50 dB Grade U
IEC 61300-3-6 Source type : LD.
Uncertainty of ± 1 dB or lower.
All ports not under test shall be
terminated to avoid unwanted reflections
contributing to the measurement
5 Polarization For balanced branching devices: Launch patchcord length: ≥ 2m.
dependent loss
≤0,2 dB for N < 4 and Source type : LD.
IEC 61300-3-2
≤0,3 dB for N = 4 and Uncertainty: ± 0,05 dB or lower.
The test should be performed for all
≤0,4 dB for N > 4
combinations of input and output ports
For unbalanced 1×2 and 2×2 branching
devices and for both output ports:
≤0,7 – 0,25 log P
10
where P is the nominal percentage of the
power associated with one port

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– 10 – IEC 61753-031-3:2009 © IEC 2009
Table 1 (continued)
No. Tests Requirements Details
6 Active monitoring of 1) For climatic tests:
Uncertainty: ± 0,05 dB or lower for
changes in attenuation
attenuation.
During and on completion of the test the
and return loss
attenuation of balanced branching devices
Uncertainty: ± 1 dB or lower for return

shall be within ±0,3 dB for N ≤ 4 and within
loss.
IEC 61300-3-3
±0,5 dB for N > 4 of the original value under
Other details: same as in Test Nos. 1
ambient conditions.
and 4
For unbalanced branching devices, the
attenuation limits shall be within ±0,3 dB for P
% > 2 % and ±0,5 dB for P % ≤ 2 % during the
test.
After the test, the return loss limits of test No.
4 shall be met.
2) For mechanical tests:
On completion of the test, the attenuation of
balanced branching devices shall be within
±0,3 dB for N ≤ 4 and within ±0,5 dB for N > 4
of the original value.
For unbalanced branching devices, the
attenuation limits shall be within ±0,3 dB for P
% > 2 % and ±0,5 dB for P % ≤ 2 % during the
test.
After the test, the return loss limits of test No.
4 shall be met
7 Optical power P = 500 mW (+27 dBm) per port only one at Same as test no.1.
max
handling and damage a time.
Test wavelengths: 1 310 nm ± 20 nm,
threshold
During the test, the attenuation limits of test
1 550 nm ± 20 nm, 1 625 nm ± 20 nm.
characterization
No. 1 shall be met. Moreover, during and on
Power increments: 3 dB.
IEC 61300-2-14 completion of the test, the attenuation shall be
within ± 0,3 dB of original value under ambient
Duration of the optical power exposure
conditions.
at each level: 30 min.
After the test, the return loss limits of test No.
Attenuation test:
4 shall be met
Uncertainty = ± 0,05 dB or lower.
Return loss test:
Uncertainty = ± 1 dB or lower
8 Cold See requirement 1) of test No. 6 Temperature: –25 °C.

Duration of exposure: 96 h.
IEC 61300-2-17
Length of the cable on each side of the
device: >1,5 m.
Specimens shall be optically functioning:
attenuation and return loss shall be
measured before the test, during the test
at a maximum interval of 1 h and after
the test by means of the monitoring set-
ups defined in test No. 6.
Preconditioning procedure:
before test, specimens shall be
maintained at room temperature for 2 h.
Recovery procedure:
after test, specimens shall be maintained
at room temperature for 2 h

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IEC 61753-031-3:2009 © IEC 2009 – 11 –
Table 1 (continued)
No. Tests Requirements Details
9 Dry heat – High See requirement 1) of test No. 6 Temperature: +70 °C.
temperature
Duration of exposure: 96 h.
endurance

Length of the cable on each side of the
IEC 61300-2-18
device: >1,5 m.
Specimens shall be optically functioning:
attenuation and return loss shall be
measured before the test, during the test
at a maximum interval of 1 h and after
the test by means of the monitoring set-
ups defined in test No. 6.
Preconditioning procedure:
before test, specimens shall be
maintained at room temperature for 2 h.
Recovery procedure:
after test, specimens shall be maintained
at room temperature for 2 h
10 Damp heat See requirement 1) of test No. 6 Temperature: (+40 ± 2) °C.
(steady state)
Relative humidity: (93 ± 2) %.

IEC 61300-2-19
Duration of exposure: 96 h.
Length of the cable on each side of the
device: >1,5 m.
Specimens shall be optically functioning:
attenuation and return loss shall be
measured before the test, during the test
at a maximum interval of 1 h and after
the test by means of the monitoring set-
ups defined in test No. 6.
Preconditioning procedure:
before test, specimens shall be
maintained at room temperature for 2 h.
Recovery procedure:
after test, specimens shall be maintained
at room temperature for 2 h
11 Damp heat (cyclic) See requirement 1) of test No. 6 High temperature: +55 °C.
IEC 61300-2-46 Low temperature: +25 °C.
Relative humidity: (93 ± 3) % except for
the first and the last 15 min of each cycle
that shall be between 90 % and 100 %.
Number of cycles: 10.
Specimens shall be optically functioning:
attenuation and return loss shall be
measured before the test, during the test
at a maximum interval of 10 min and
after the test by means of the monitoring
set-ups defined in test No. 6.
Preconditioning procedure:
before test, specimens shall be
maintained at room temperature for 2 h.
Recovery procedure:
after test, specimens shall be maintained
at room temperature for 2 h

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– 12 – IEC 61753-031-3:2009 © IEC 2009
Table 1 (continued)
No. Tests Requirements Details
12 Change of See requirement 1) of test No. 6 High temperature: +70 °C.
temperature
Low temperature: –25 °C.

IEC 61300-2-22
Duration at extreme temperature: 1 h.
Temperature rate of change: 1 °C/min.
Number of cycles: 12.
Specimens shall be optically functioning:
attenuation and return loss shall be
measured before the test, during the test
at a maximum interval of 10 min and
after the test by means of the monitoring
set-ups defined in test No. 6.
Preconditioning procedure:
before test, specimens shall be
maintained at room temperature for 2 h.
Recovery procedure:
after test, specimens shall be maintained
at room temperature for 2 h
13 Vibration See requirement 2) of test No. 6 Frequency range: 10 Hz – 55 Hz.
(sinusoidal)
Duration per axis: 0,5 h.

IEC 61300-2-1
Number of axes: 3 orthogonal.
Rate of change: 1 octave/min.
Number of sweeps (10 Hz – 55 Hz –
10 Hz): 15.
Vibration amplitude: 0,75 mm.
Specimens shall be optically functioning:
attenuation and ret
...