SIST EN 61280-4-4:2017

Fibre optic communication subsystem test procedures - Part 4-4: Cable plants and links - Polarization mode dispersion measurement for installed links (IEC 61280-4-4:2017)

This part of IEC 61280 provides uniform methods of measuring polarization mode dispersion
(PMD) of single-mode installed links. An installed link is the optical path between transmitter
and receiver, or a portion of that optical path. These measurements can be used to assess
the suitability of a given link for high bit rate applications, or to provide insight on the
relationships of various related transmission attributes. This document focuses on the
measurement methods and requirements for measuring long lengths of installed cabling that
can also include other optical elements, such as splices, connectors, amplifiers, chromatic
dispersion compensating modules, dense wavelength division multiplexing or multiplexer
(DWDM) components, multiplexers, wavelength selective switches, re-configurable optical
add drop multiplexer (ROADMS).
This document focuses on the apparatus, procedures, and calculations needed to complete
measurements. IEC TR 61282-9 explains the theory behind the test methods.

Prüfverfahren für Lichtwellenleiter-Kommunikationsuntersysteme - Teil 4-4: Kabelnetze und Übertragungsstrecken - Messung der Polarisationsmodendispersion von installierten Übertragungsstrecken (IEC 61280-4-4:2017)

Procédures d'essai des sous-systèmes de télécommunication à fibres optiques - Partie 4-4: Installation de câbles et liens - Mesure de la dispersion de mode polarisation pour les liaisons installées (IEC 61280-4-4:2017)

IEC 61280-4-4: 2017 fournit des méthodes uniformes de mesure de la dispersion de mode de polarisation (PMD) de liaisons unimodales installées. Une liaison installée est le chemin optique entre l’émetteur et le récepteur ou une partie de ce chemin optique. Ces mesures peuvent être utilisées afin d’évaluer si une liaison donnée est adaptée à des applications à débit binaire élevé ou pour connaître les relations entre différents attributs connexes d’une transmission. Le présent document se concentre sur les méthodes de mesure et les exigences relatives à la mesure de grandes longueurs d’une installation câblée qui peut également inclure d’autres éléments optiques, tels que des épissures, des connecteurs, des amplificateurs, des modules de compensation de dispersion chromatique, des composants de multiplexage ou multiplexeurs par répartition en longueur d'onde dense (DWDM – dense wavelength division multiplexing or multiplexer), des multiplexeurs, des commutateurs sélectifs en longueur d'onde, ainsi qu’un multiplexeur optique d’insertion-extraction reconfigurable (ROADMS – re-configurable optical add drop multiplexer). Le présent document se concentre sur l’appareillage, les procédures et les calculs nécessaires pour effectuer des mesures. L’IEC TR 61282-9 explique la théorie qui régit les méthodes d’essai. Cette deuxième édition annule et remplace la première édition parue en 2006. Cette deuxième édition constitue une révision technique. Cette édition inclut les modifications techniques majeures suivantes par rapport à l'édition précédente:
· suppression de la théorie et remplacement par une référence à l’IEC TR 61282-9;
· ajout, en tant qu’Annexe G, d’une nouvelle méthode,
· à savoir analyse OTDR et SOP par balayage de longueur d'onde (WSOSA);
· ajout d’une description succincte de chaque méthode à l’Article 5;
· conversion des méthodes E et F en Annexes E et F informatives;
· ajout d’un nouvel Article (6) sur les configurations de mesure;
· ajout d’un nouvel Article (7) sur les considérations de mesure;
· extension de l’Article 10 sur la procédure;
· amélioration de plusieurs diagrammes dédiés à l’appareillage;
· plusieurs clarifications internes à l’Annexe H portant sur les mesures et les calculs effectués.
La présente version bilingue (2020-09) correspond à la version anglaise monolingue publiée en 2017-03.

Postopki preskušanja optičnega komunikacijskega podsistema - 4-4. del: Kabelske oblike in povezave - Meritve polarizacijske razpršitve v vgrajenih povezavah (IEC 61280-4-4:2017)

Ta del standarda IEC 61280 zagotavlja enotne metode za merjenje polarizacijske razpršitve (PMD) enorodovnih vgrajenih povezav. Vgrajena povezava je optična pot med oddajnikom in sprejemnikom ali del te optične poti. Te meritve se lahko uporabijo za ocenjevanje primernosti posamezne povezave za aplikacije z visoko bitno hitrostjo ali za zagotavljanje vpogleda v odnose med različnimi povezanimi prenosnimi atributi. Ta dokument se osredotoča na merilne metode in zahteve za merjenje dolgega položenega kablovja, ki lahko vključuje tudi druge optične elemente, kot so spoji, priključki, ojačevalniki, moduli za kompenzacijo kromatske disperzije, multiplekserji za zgoščenovalovno dolžinsko multipleksiranje (DWDM) oziroma njihove komponente, multiplekserji, valovnodolžinska selektivna stikala, ponovno nastavljivi optični
dodajalno-odstranjevalni multiplekserji (ROADMS).
Ta dokument se osredotoča na naprave, postopke in izračune, potrebne za dokončanje meritev. Standard IEC TR 61282-9 vsebuje teorijo preskusnih metod.

General Information

• Status: Published
• Publication Date: 10-Sep-2017
• ICS: 33.180.01 - Fibre optic systems in general
• Technical Committee: MOC - Mobile Communications
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 28-Aug-2017
• Due Date: 02-Nov-2017
• Completion Date: 11-Sep-2017
• Ref Project: EN 61280-4-4:2017 - Fibre optic communication subsystem test procedures - Part 4-4: Cable plants and links - Polarization mode dispersion measurement for installed links

Relations

• Revised: SIST EN 61280-4-4:2006 - Fibre optic communication subsystem test procedures -- Part 4-4: Cable plants and links - Polarization mode dispersion measurement for installed links
• Effective Date: 03-May-2016
• Replaces: SIST EN 61280-4-4:2006 - Fibre optic communication subsystem test procedures -- Part 4-4: Cable plants and links - Polarization mode dispersion measurement for installed links
• Effective Date: 22-Aug-2017
• Replaces: SIST EN 61280-4-4:2006 - Fibre optic communication subsystem test procedures -- Part 4-4: Cable plants and links - Polarization mode dispersion measurement for installed links
• Effective Date: 07-Jun-2022

Standards Content (Sample)

SLOVENSKI STANDARD
SIST EN 61280-4-4:2017
01-oktober-2017
1DGRPHãþD
SIST EN 61280-4-4:2006
3RVWRSNLSUHVNXãDQMDRSWLþQHJDNRPXQLNDFLMVNHJDSRGVLVWHPDGHO.DEHOVNH
REOLNHLQSRYH]DYH0HULWYHSRODUL]DFLMVNHUD]SUãLWYHYYJUDMHQLKSRYH]DYDK,(&

Fibre optic communication subsystem test procedures - Part 4-4: Cable plants and links
- Polarization mode dispersion measurement for installed links (IEC 61280-4-4:2017)
Prüfverfahren für Lichtwellenleiter-Kommunikationsuntersysteme - Teil 4-4: Kabelnetze
und Übertragungsstrecken - Messung der Polarisationsmodendispersion von installierten
Übertragungsstrecken (IEC 61280-4-4:2017)
Procédures d'essai des sous-systèmes de télécommunication à fibres optiques - Partie 4
-4: Installation de câbles et liens - Mesure de la dispersion de mode polarisation pour les
liaisons installées (IEC 61280-4-4:2017)
Ta slovenski standard je istoveten z: EN 61280-4-4:2017
ICS:
33.180.01 6LVWHPL]RSWLþQLPLYODNQLQD Fibre optic systems in
VSORãQR general
SIST EN 61280-4-4:2017 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST EN 61280-4-4:2017

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SIST EN 61280-4-4:2017


EUROPEAN STANDARD EN 61280-4-4

NORME EUROPÉENNE

EUROPÄISCHE NORM
August 2017
ICS 33.180.01 Supersedes EN 61280-4-4:2006
English Version
Fibre optic communication subsystem test procedures -
Part 4-4: Cable plants and links - Polarization mode dispersion
measurement for installed links
(IEC 61280-4-4:2017)
Procédures d'essai des sous-systèmes de Prüfverfahren für Lichtwellenleiter-
télécommunication à fibres optiques - Partie 4-4: Installation Kommunikationsuntersysteme - Teil 4-4: Kabelnetze und
de câbles et liens - Mesure de la dispersion de mode Übertragungsstrecken - Messung der
polarisation pour les liaisons installées Polarisationsmodendispersion von installierten
(IEC 61280-4-4:2017) Übertragungsstrecken
(IEC 61280-4-4:2017)
This European Standard was approved by CENELEC on 2017-04-11. 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: Avenue Marnix 17, B-1000 Brussels
© 2017 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
 Ref. No. EN 61280-4-4:2017 E

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SIST EN 61280-4-4:2017
EN 61280-4-4:2017
European foreword
The text of document 86C/1378/CDV, future edition 2 of IEC 61280-4-4, 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 61280-4-4:2017.

The following dates are fixed:
(dop) 2018-02-18
• 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) 2020-08-18
standards conflicting with the
document have to be withdrawn

This document supersedes EN 61280-4-4:2006.

This edition includes the following significant technical changes with respect to the previous edition:

EN 61280-4-4:2017 includes the following significant technical changes with respect to
EN 61280-4-4:2006:
a) theory is removed and replaced with a reference to IEC/TR 61282-9;
b) a new method, wavelength scanning OTDR and SOP analysis (WSOSA), is added as
Annex G;
c) a brief description of each method is added to Clause 5;
d) Methods E and F are converted to informative Annexes E and F;
e) a new Clause (6) on measurement configurations is added;
f) a new Clause (7) on measurement considerations is added;
g) Clause 10 on procedure is expanded;
h) several of the apparatus diagrams are improved;
i) several clarifications about what is measured and what is calculated have been made in
Annex H.

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 61280-4-4:2017 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:

1)
IEC 60793-1-48:2003 NOTE Harmonized as EN 60793-1-48:2003 (not modified).
IEC 60793-1-48:2007 NOTE Harmonized as EN 60793-1-48:2007 (not modified).
IEC 60793-2-50 NOTE Harmonized as EN 60793-2-50.
IEC 61280-4-4:2006 NOTE Harmonized as EN 61280-4-4:2006 (not modified).
IEC 61290-11-1 NOTE Harmonized as EN 61290-11-1.
IEC 61290-11-2 NOTE Harmonized as EN 61290-11-2.
IEC 61300-3-32 NOTE Harmonized as EN 61300-3-32.

1)
Superseded by EN 60793-1-48:2007 (IEC 60793-1-48:2007).
2

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SIST EN 61280-4-4:2017
EN 61280-4-4:2017
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 60793-1-44 -  Optical fibres - EN 60793-1-44 -
Part 1-44: Measurement methods and test
procedures - Cut-off wavelength
IEC 61300-3-35 -  Fibre optic interconnecting devices and EN 61300-3-35 -
passive components - Basic test and
measurement procedures -
Part 3-35: Examinations and
measurements - Visual inspection of fibre
optic connectors and fibre-stub
transceivers
IEC/TR 61282-9 -  Fibre optic communication system design - -
guides -
Part 9: Guidance on polarization mode
dispersion measurements and theory
IEC/TR 62627-01 -  Fibre optic interconnecting devices and - -
passive components -
Part 01: Fibre optic connector cleaning
methods

3

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SIST EN 61280-4-4:2017

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SIST EN 61280-4-4:2017




IEC 61280-4-4

®


Edition 2.0 2017-03




INTERNATIONAL



STANDARD








colour

inside










Fibre optic communication subsystem test procedures –

Part 4-4: Cable plants and links – Polarization mode dispersion measurement

for installed links


























INTERNATIONAL

ELECTROTECHNICAL


COMMISSION





ICS 33.180.01 ISBN 978-2-8322-4077-9



  Warning! Make sure that you obtained this publication from an authorized distributor.


® Registered trademark of the International Electrotechnical Commission

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SIST EN 61280-4-4:2017
– 2 – IEC 61280-4-4:2017  IEC 2017
CONTENTS
FOREWORD . 7
INTRODUCTION . 9
1 Scope . 10
2 Normative references . 10
3 Terms, definitions, symbols and abbreviated terms . 10
3.1 Terms and definitions . 10
3.2 Symbols and abbreviated terms . 11
4 Background on PMD properties . 12
5 Measurement methods . 13
5.1 Methods of measuring PMD . 13
5.1.1 General . 13
5.1.2 Method A: Fixed analyzer with Fourier transformation (FA-FT) . 14
5.1.3 Method B: Stokes parameters evaluation (SPE) . 14
5.1.4 Method C: Interferometric . 15
5.1.5 Method D: Stokes parameter evaluation using back-reflected light . 15
5.1.6 Method E: Modulated phase-shift technique . 15
5.1.7 Method F: Polarization phase shift (PPS) . 15
5.1.8 Method G: Wavelength scanning OTDR and SOP Analysis (WSOSA) . 16
5.2 Document structure . 16
5.3 Reference test method . 16
6 Measurement configurations . 16
6.1 Passive cabling link . 16
6.2 Link including amplifiers . 17
6.3 Link including chromatic dispersion compensating modules . 17
6.3.1 General . 17
6.3.2 Grating based DCM . 17
6.4 Link including ROADMs . 17
6.4.1 General . 17
6.4.2 Multi-channel point to point configuration . 18
6.4.3 Single channel configuration . 18
7 Measurement considerations . 18
7.1 General . 18
7.2 Wavelength range . 18
7.3 PMD measurement range. 18
7.4 Measurement dynamic range . 19
7.5 Fibre movement . 19
7.6 Input and output SOP scrambling . 19
7.6.1 General . 19
7.6.2 Polarizers/scramblers . 19
7.6.3 The 9-states Mueller set . 20
7.6.4 Random scrambling . 20
7.7 Polarization dependent loss . 20
7.8 Amplifier considerations . 20
7.8.1 General . 20
7.8.2 Optical isolators . 20
7.8.3 Wavelength range . 20

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SIST EN 61280-4-4:2017
IEC 61280-4-4:2017  IEC 2017 – 3 –
7.8.4 Power levels . 20
7.8.5 Amplified spontaneous emission (ASE) noise . 21
7.9 Considerations on location of equipment . 21
8 Apparatus . 21
8.1 General . 21
8.2 Light source and polarizers . 21
8.3 Input optics . 22
8.4 Cladding mode stripper . 22
8.5 High-order mode filter . 22
8.6 Output connection . 22
8.7 Output optics . 23
8.8 Detector . 23
8.9 Computer or test platform . 23
8.10 Means to reduce the effects of amplified spontaneous emission . 23
9 Sampling and specimens . 23
10 Procedure . 23
11 Calculation or interpretation of results . 24
12 Documentation . 24
12.1 Information required for each measurement . 24
12.2 Information to be available . 24
13 Specification information . 25
Annex A (normative) Fixed analyzer method . 26
A.1 Apparatus . 26
A.1.1 Block diagrams . 26
A.1.2 Light source . 28
A.1.3 Analyzer . 29
A.1.4 Optional polarization control at the input and output of the link under
test . 29
A.2 Procedure . 29
A.2.1 Wavelength range and increment . 29
A.2.2 Complete the scans . 30
A.3 Calculations – Fourier transform . 31
A.3.1 General . 31
A.3.2 Data pre-processing and Fourier transformation . 32
A.3.3 Transform data fitting. 32
A.3.4 Spectral range . 34
Annex B (normative) Stokes parameter evaluation method . 36
B.1 Apparatus . 36
B.1.1 Block diagrams . 36
B.1.2 Light source . 37
B.1.3 Polarimeter . 37
B.2 Procedure . 37
B.3 Calculations . 38
B.3.1 General . 38
B.3.2 Jones matrix eigenanalysis (JME) . 38
B.3.3 Poincaré sphere analysis (PSA) DGD calculation . 40
Annex C (normative) Interferometric method . 41
C.1 General . 41

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SIST EN 61280-4-4:2017
– 4 – IEC 61280-4-4:2017  IEC 2017
C.2 Traditional analysis (TINTY) . 42
C.2.1 Apparatus . 42
C.2.2 Procedure . 43
C.2.3 Calculations . 44
C.3 General analysis (GINTY) . 45
C.3.1 Benefit . 45
C.3.2 Apparatus . 45
C.3.3 Procedure . 46
C.3.4 Calculations . 47
Annex D (informative) Stokes parameter evaluation method using back-reflected light. 49
D.1 Utility . 49
D.2 Apparatus . 49
D.2.1 Block diagram . 49
D.2.2 Directional coupler . 49
D.2.3 Angled connector . 49
D.2.4 Far-end termination . 49
D.3 Procedure . 50
D.4 Calculation and interpretation of results . 50
Annex E (informative) Modulation phase-shift method . 51
E.1 Apparatus . 51
E.1.1 Overview and block diagrams . 51
E.1.2 Light source(s). 52
E.1.3 Modulation . 53
E.1.4 Polarization control . 54
E.1.5 Input and output optics . 54
E.1.6 Optical detector and phase detection electronics . 55
E.1.7 Reference signal. 55
E.2 Procedure . 55
E.2.1 Modulation frequency . 55
E.2.2 Scan the wavelengths and measure DGD . 55
E.2.3 Calibration . 58
E.3 Calculations . 58
E.3.1 DGD calculations . 58
E.3.2 PMD calculation . 59
Annex F (informative) Polarization phase shift method . 60
F.1 Apparatus . 60
F.1.1 Block diagram . 60
F.1.2 Light source . 60
F.1.3 Modulation . 60
F.1.4 Polarization control . 61
F.1.5 Output optics . 61
F.1.6 Optical detectors . 61
F.1.7 Amplitude and phase comparator . 61
F.1.8 Reference signal. 62
F.2 Procedure . 62
F.2.1 Modulation frequency . 62
F.2.2 Wavelength increment . 62
F.2.3 Scanning wavelengths and measuring DGDs . 62
F.2.4 Calibration . 63

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SIST EN 61280-4-4:2017
IEC 61280-4-4:2017  IEC 2017 – 5 –
F.3 Calculations . 63
F.3.1 Results overview . 63
F.3.2 DGD determination . 64
F.3.3 PMD calculation . 65
Annex G (normative) Wavelength scanning OTDR and SOP analysis (WSOSA) PMD
test method . 66
G.1 General . 66
G.2 Apparatus . 66
G.2.1 Block diagram . 66
G.2.2 Light source . 67
G.2.3 Launch polarization . 67
G.2.4 Polarization scrambling . 68
G.2.5 Input/output optics . 68
G.3 Specimen stability . 68
G.4 Procedure . 68
G.4.1 Set instrument parameters . 68
G.4.2 Action of the instrument after measurement initiation . 69
G.5 Calculations . 71
G.5.1 Power normalisation . 71
G.5.2 Transmission differences . 72
G.5.3 Mean-square transmission difference and round trip PMD . 73
G.5.4 Determination of PMD . 74
G.6 Procedures for measuring PMD on installed aerial links . 74
G.6.1 Instability compensation . 74
G.6.2 Approaches to reducing the effects of instabilities . 75
Annex H (informative) PMD determination by Method C . 77
H.1 General . 77
H.2 Traditional analysis . 77
H.3 General analysis . 79
Bibliography . 81

Figure 1 – Typical passive cabling link configuration . 16
Figure 2 – Example configuration of link including amplifiers . 17
Figure A.1 – Block diagrams for fixed analyzer . 28
Figure A.2 –
...