IEC 60793-1-48:2007

INTERNATIONAL IEC
STANDARD
CEI
60793-1-48
NORME
Second edition
INTERNATIONALE
Deuxième édition
2007-06
Optical fibres –
Part 1-48:
Measurement methods and test procedures –
Polarization mode dispersion
Fibres optiques –
Partie 1-48:
Méthodes de mesure et procédures d’essai –
Dispersion du mode de polarisation
Reference number
Numéro de référence
IEC/CEI 60793-1-48:2007
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INTERNATIONAL IEC
STANDARD
CEI
60793-1-48
NORME
Second edition
INTERNATIONALE
Deuxième édition
2007-06
Optical fibres –
Part 1-48:
Measurement methods and test procedures –
Polarization mode dispersion
Fibres optiques –
Partie 1-48:
Méthodes de mesure et procédures d’essai –
Dispersion du mode de polarisation
PRICE CODE
X
CODE PRIX
Commission Electrotechnique Internationale
International Electrotechnical Commission
МеждународнаяЭлектротехническаяКомиссия
For price, see current catalogue
Pour prix, voir catalogue en vigueur

– 2 – 60793-1-48 © IEC:2007
CONTENTS
FOREWORD.4
INTRODUCTION.6

1 Scope.7
2 Normative references .7
3 Terms and definitions .8
4 General .8
4.1 Methods for measuring PMD .8
4.2 Reference test method .10
4.3 Applicability.10
5 Apparatus.11
5.1 Light source and polarizers .11
5.2 Input optics .11
5.3 Input positioner .12
5.4 Cladding mode stripper .12
5.5 High-order mode filter.12
5.6 Output positioner.12
5.7 Output optics.12
5.8 Detector .12
5.9 Computer .12
6 Sampling and specimens.12
6.1 General .12
6.2 Specimen length.13
6.3 Deployment .13
7 Procedure .14
8 Calculation or interpretation of results .14
9 Documentation .14
9.1 Information required for each measurement .14
9.2 Information to be available .14
10 Specification information .15

Annex A (normative) Fixed analyser measurement method .16
Annex B (normative) Stokes evaluation method .27
Annex C (normative) Interferometry method.32
Annex D (informative) Determination of RMS width from a fringe envelope .42
Annex E (informative) Glossary of symbols .46

Bibliography.48

Figure A.1 – Block diagrams for Method A .16
Figure A.2 – Typical results from Method A.19
Figure A.3 – PMD by Fourier analysis .22
Figure A.4 – Cross-correlation and autocorrelation functions .26

60793-1-48 © IEC:2007 – 3 –
Figure B.1 – Block diagram for Method B .27
Figure B.2 – Typical random-mode-coupling results from Method B .29
Figure B.3 – Typical histogram of DGD values .29
Figure C.1 – Schematic diagram for Method C (generic implementation).32
Figure C.2 – Other schematic diagrams for Method C .34
Figure C.3a – Random mode-coupling using a TINTY-based measurement system
with one I/O SOP .37
Figure C.3b – Negligible mode-coupling using a TINTY-based measurement system
with one I/O SOP .37
Figure C.3 – Fringe envelopes for negligible and random polarization mode-coupling .37
Figure C.4a – Random mode-coupling using a GINTY-based measurement system
with I/O-SOP scrambling.38
Figure C.4b – Negligible mode-coupling using a GINTY-based measurement system
with I/O-SOP scrambling.38
Figure C.4c – Mixed mode-coupling using a GINTY-based measurement system with
I/O-SOP scrambling .39
Figure C.4 – Fringe envelopes for negligible and random polarization mode-coupling
(Ginty procedure).39
Figure D.1 – Parameters for interferogram analysis .42

Table A.1 – Cosine transform calculations .25

– 4 – 60793-1-48 © IEC:2007
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
OPTICAL FIBRES –
Part 1-48: Measurement methods and test procedures –
Polarization mode dispersion
FOREWORD
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