IEC 60793-1-61:2017
(Main)Optical fibres - Part 1-61: Measurement methods and test procedures - Polarization crosstalk
Optical fibres - Part 1-61: Measurement methods and test procedures - Polarization crosstalk
IEC 60793-1-61: 2017 establishes uniform requirements for measuring the polarization crosstalk of polarization-maintaining (PM) fibres. This document gives two methods for measuring the polarization crosstalk of PM fibres. Method A is the power ratio method, which uses the maximum and minimum values of output power at a specified wavelength, and Method B is the in-line method, which uses an analysis of the Poincaré sphere. Details of each method are described in Clause 6. Crosstalk values obtained by Methods A and B are based on different definitions. The crosstalk measured by Method A is defined as an "averaged" value over a measured wavelength range. In contrast, the crosstalk value obtained from Method B shows the "worst case" crosstalk value.
Fibres optiques - Partie 1-61: Méthodes de mesure et procédures d’essai - Diaphonie de polarisation
IEC 60732-1-61: 2017 définit des exigences uniformes relatives au mesurage de la diaphonie de polarisation des fibres à maintien de polarisation (PM - polarization-maintaining). Le présent document fournit deux méthodes de mesurage de la diaphonie de polarisation des fibres PM. La Méthode A est la méthode du rapport de puissance, qui utilise les valeurs maximale et minimale de puissance de sortie à une longueur d’onde spécifiée, et la Méthode B est la méthode synchronisée, qui utilise une analyse de la sphère de Poincaré. L’Article 6 détaille chacune des méthodes. Les valeurs de diaphonie obtenues par les Méthodes A et B se fondent sur des définitions différentes. La diaphonie mesurée par la Méthode A se définit comme une valeur « moyenne » dans une plage mesurée de longueurs d’ondes. Par contraste, la valeur de diaphonie obtenue avec la Méthode B est la valeur de diaphonie « la plus défavorable ».
La présente version bilingue (2020-09) correspond à la version anglaise monolingue publiée en 2017-02.
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IEC 60793-1-61 ®
Edition 1.0 2017-02
INTERNATIONAL
STANDARD
Optical fibres –
Part 1-61: Measurement methods and test procedures – Polarization crosstalk
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form
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IEC 60793-1-61 ®
Edition 1.0 2017-02
INTERNATIONAL
STANDARD
Optical fibres –
Part 1-61: Measurement methods and test procedures – Polarization crosstalk
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 33.180.10 ISBN 978-2-8322-3867-7
– 2 – IEC 60793-1-61:2017 © IEC 2017
CONTENTS
FOREWORD . 3
1 Scope . 5
2 Normative references . 5
3 Terms and definitions . 5
4 Test conditions . 5
5 Reference test method . 6
6 Test methods . 6
6.1 Method A: Power ratio method . 6
6.1.1 Overview of the method . 6
6.1.2 Application . 6
6.1.3 Test apparatus . 6
6.1.4 Test procedure . 7
6.2 Method B: In-line polarimetric method . 8
6.2.1 General . 8
6.2.2 Limitations of the method . 8
6.2.3 Measurement process . 8
6.2.4 Mathematical basis . 9
7 Results . 10
7.1 Information available with each measurement . 10
7.2 Information available upon request . 10
Figure 1 – Example of test apparatus for polarization crosstalk measurement (power
ratio method) . 6
Figure 2 – Poincaré sphere representations for Method B . 9
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
OPTICAL FIBRES –
Part 1-61: Measurement methods and test procedures –
Polarization crosstalk
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 60793-1-61 has been prepared by subcommittee 86A: Fibres and
cables, of IEC technical committee 86: Fibre optics.
The text of this International Standard is based on the following documents:
CDV Report on voting
86A/1739/CDV 86A/1781/RVC
Full information on the voting for the approval of this International Standard can be found in
the report on voting indicated in the above table.
This document has been drafted in accordance with the ISO/IEC Directives, Part 2.
A list of all parts in the IEC 60793 series, published under the general title Optical fibres, can
be found on the IEC website.
– 4 – IEC 60793-1-61:2017 © IEC 2017
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.
A bilingual version of this publication may be issued at a later date.
OPTICAL FIBRES –
Part 1-61: Measurement methods and test procedures –
Polarization crosstalk
1 Scope
This part of IEC 60793 establishes uniform requirements for measuring the polarization
crosstalk of polarization-maintaining (PM) fibres.
This document gives two methods for measuring the polarization crosstalk of PM fibres.
Method A is the power ratio method, which uses the maximum and minimum values of output
power at a specified wavelength, and Method B is the in-line method, which uses an analysis
of the Poincaré sphere.
Details of each method are described in Clause 6.
Crosstalk values obtained by Methods A and B are based on different definitions.
The crosstalk measured by Method A is defined as an "averaged" value over a measured
wavelength range. In contrast, the crosstalk value obtained from Method B shows the "worst
case" crosstalk value.
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 60793-1-1, Optical fibres – Part 1-1: Measurement methods and test procedures –
General and guidance
IEC 60793-2-70 , Optical fibres – Part 2-70: Product specifications – Sectional specifications
for polarization-maintaining fibres
IEC 60068-1, Environmental testing – Part 1: General and guidance
3 Terms and definitions
For the purposes of this document, the terms and definitions given in IEC 60793-1-1 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
4 Test conditions
Unless otherwise specified, the test shall be conducted under the standard conditions
specified in IEC 60068-1. However, when it is difficult to make measurements under the
standard conditions, the test may be conducted under conditions other than the standard
conditions, provided that no doubts will arise about judgments.
___________
Under preparation. Stage at the time of publication: IEC CCDV 60793-2-70:2017.
– 6 – IEC 60793-1-61:2017 © IEC 2017
5 Reference test method
Since the "averaged" polarization crosstalk value measured by Method A is the parameter
specified in the product specification, IEC 60793-2-70 , Method A is the reference test
method (RTM), which shall be the one used to settle disputes.
6 Test methods
6.1 Method A: Power ratio method
6.1.1 Overview of the method
Method A is applicable to PM fibres, fibres having connectors attached to one or both ends of
the fibres, and to two or more such entities joined in series. Adjust the optical output to the
minimum by rotating both the polarizer and analyser, and measure the optical output as P .
min
Rotate the analyser 90° and measure the optical output as P .
max
Calculate the polarization crosstalk with the second set of values and take the average of the
two values as the measured value.
6.1.2 Application
This measuring method shall be applied to the measurement of polarization crosstalk using
the maximum and minimum values of optical output at a specified wavelength.
6.1.3 Test apparatus
6.1.3.1 Principle
Figure 1 shows an example of a test apparatus.
Input Output
optics optics
Sample under test
Light
Depolarizer Polarizer Analyzer Detector
source
IEC
Figure 1 – Example of test apparatus for polarization
crosstalk measurement (power ratio method)
6.1.3.2 Light source
The light source to be used
...
IEC 60793-1-61 ®
Edition 1.0 2017-02
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Optical fibres –
Part 1-61: Measurement methods and test procedures – Polarization crosstalk
Fibres optiques –
Partie 1-61: Méthodes de mesure et procédures d’essai – Diaphonie de
polarisation
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form
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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
The technical content of IEC publications is kept under constant review by the IEC. Please make sure that you have the
latest edition, a corrigendum or an amendment might have been published.
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IEC 60793-1-61 ®
Edition 1.0 2017-02
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Optical fibres –
Part 1-61: Measurement methods and test procedures – Polarization crosstalk
Fibres optiques –
Partie 1-61: Méthodes de mesure et procédures d’essai – Diaphonie de
polarisation
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 33.180.10 ISBN 978-2-8322-8808-5
– 2 – IEC 60793-1-61:2017 © IEC 2017
CONTENTS
FOREWORD . 3
1 Scope . 5
2 Normative references . 5
3 Terms and definitions . 5
4 Test conditions . 6
5 Reference test method . 6
6 Test methods . 6
6.1 Method A: Power ratio method . 6
6.1.1 Overview of the method . 6
6.1.2 Application . 6
6.1.3 Test apparatus . 6
6.1.4 Test procedure . 8
6.2 Method B: In-line polarimetric method . 8
6.2.1 General . 8
6.2.2 Limitations of the method . 9
6.2.3 Measurement process . 9
6.2.4 Mathematical basis . 9
7 Results . 10
7.1 Information available with each measurement . 10
7.2 Information available upon request . 10
Figure 1 – Example of test apparatus for polarization crosstalk measurement (power
ratio method) . 6
Figure 2 – Poincaré sphere representations for Method B . 9
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
OPTICAL FIBRES –
Part 1-61: Measurement methods and test procedures –
Polarization crosstalk
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 60793-1-61 has been prepared by subcommittee 86A: Fibres and
cables, of IEC technical committee 86: Fibre optics.
The text of this International Standard is based on the following documents:
CDV Report on voting
86A/1739/CDV 86A/1781/RVC
Full information on the voting for the approval of this International Standard can be found in the
report on voting indicated in the above table.
This document has been drafted in accordance with the ISO/IEC Directives, Part 2.
A list of all parts in the IEC 60793 series, published under the general title Optical fibres, can
be found on the IEC website.
– 4 – IEC 60793-1-61:2017 © IEC 2017
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.
OPTICAL FIBRES –
Part 1-61: Measurement methods and test procedures –
Polarization crosstalk
1 Scope
This part of IEC 60793 establishes uniform requirements for measuring the polarization
crosstalk of polarization-maintaining (PM) fibres.
This document gives two methods for measuring the polarization crosstalk of PM fibres. Method
A is the power ratio method, which uses the maximum and minimum values of output power at
a specified wavelength, and Method B is the in-line method, which uses an analysis of the
Poincaré sphere.
Details of each method are described in Clause 6.
Crosstalk values obtained by Methods A and B are based on different definitions.
The crosstalk measured by Method A is defined as an "averaged" value over a measured
wavelength range. In contrast, the crosstalk value obtained from Method B shows the "worst
case" crosstalk value.
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 60793-1-1, Optical fibres – Part 1-1: Measurement methods and test procedures –General
and guidance
, O
...
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