IEC 60793-1-42:2013
(Main)Optical fibres - Part 1-42: Measurement methods and test procedures - Chromatic dispersion
Optical fibres - Part 1-42: Measurement methods and test procedures - Chromatic dispersion
IEC 60793-1-42:2013 establishes uniform requirements for measuring the chromatic dispersion of optical fibre, thereby assisting in the inspection of fibres and cables for commercial purposes. This third edition cancels and replaces the second edition, published in 2007. It constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition:
- the inclusion of category B6 single-mode fibres;
- the deletion of test method D (interferometry). Keywords: chromatic dispersion of optical fibre
This publication is to be read in conjunction with IEC 60793-1-1:2008.
Fibres optiques - Partie 1-42: Méthodes de mesure et procédures d'essai - Dispersion chromatique
La CEI 60793-1-42:2013 établit des exigences uniformes pour la mesure de la dispersion chromatique des fibres optiques, contribuant ainsi au contrôle des fibres et des câbles dans les relations commerciales. Cette troisième édition annule et remplace la deuxième édition parue en 2007, et constitue une révision technique. Cette édition inclut les modifications techniques majeures suivantes par rapport à l'édition précédente:
- Ajout des fibres unimodales de catégorie B6;
- Suppression de la méthode d'essai D (interférométrie). Mots clés: dispersion chromatique des fibres optiques
Cette publication doit être lue conjointement avec la CEI 60793-1-1:2008.
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IEC 60793-1-42 ®
Edition 3.0 2013-01
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Optical fibres –
Part 1-42: Measurement methods and test procedures – Chromatic dispersion
Fibres optiques –
Partie 1-42: Méthodes de mesure et procédures d’essai – Dispersion
chromatique
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IEC 60793-1-42 ®
Edition 3.0 2013-01
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Optical fibres –
Part 1-42: Measurement methods and test procedures – Chromatic dispersion
Fibres optiques –
Partie 1-42: Méthodes de mesure et procédures d’essai – Dispersion
chromatique
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
PRICE CODE
INTERNATIONALE
CODE PRIX U
ICS 33.180.10 ISBN 978-2-83220-576-1
– 2 – 60793-1-42 © IEC:2013
CONTENTS
FOREWORD . 4
1 Scope . 6
2 Normative references . 7
3 Overview of methods . 7
3.1 Method A, phase shift . 7
3.2 Method B, spectral group delay in the time domain . 7
3.3 Method C, differential phase shift . 7
4 Reference test methods . 8
4.1 Category A1 and sub-category A4f, A4g and A4h multimode fibres . 8
4.2 Class B single-mode fibres . 8
5 Apparatus . 8
5.1 General . 8
5.2 Launch optics . 8
5.3 High-order mode filter (single-mode) . 8
5.4 Input positioning apparatus . 8
5.5 Output positioning apparatus . 8
5.6 Computation equipment . 9
6 Sampling and specimens . 9
6.1 Specimen length . 9
6.2 Specimen end face . 9
6.3 Reference fibre. 9
7 Procedure. 9
8 Calculations . 9
8.1 General . 9
8.2 Category A1 and sub-category A4f, A4g, A4h multimode fibres and category
B1.1, B1.3 and sub-category B6_a1 and B6_a2 single-mode fibres . 10
8.3 Category B1.2 single-mode fibres . 10
8.4 Category B2 single-mode fibres . 10
8.5 Category B4 and B5 single-mode fibres . 11
9 Results . 11
9.1 Report the following information with each measurement: . 11
9.2 The following information shall be available upon request: . 11
10 Specification information . 11
Annex A (normative) Requirements specific to method A, phase-shift . 12
Annex B (normative) Requirements specific to method B, spectral group delay in the
time domain . 17
Annex C (normative) Requirements specific to method C, differential phase-shift . 21
Annex D (normative) Chromatic dispersion fitting . 26
Bibliography . 28
Figure A.1 – Chromatic dispersion measurement set, multiple laser system (typical) . 13
Figure A.2 – Typical delay and dispersion curves . 13
Figure A.3 – Chromatic dispersion measurement set, LED system (typical) . 15
Figure B.1 – Block diagram, fibre Raman laser system . 18
Figure B.2 – Block diagram, multiple laser diode system . 18
60793-1-42 © IEC:2013 – 3 –
Figure C.1 – Chromatic differential phase dispersion measurement set, multiple laser
system . 22
Figure C.2 – Chromatic differential phase dispersion measurement set, LED system . 23
Figure C.3 – Chromatic dispersion measurement set, differential phase by dual
wavelength method . 23
Figure C.4 – Chromatic dispersion measurement set, differential phase by double
demodulation . 24
Table D.1 – Definition of fit types and fit coefficients; equations for group delay and
dispersion coefficient . 26
Table D.2 – Slope equations . 26
Table D.3 – Zero-dispersion wavelength and slope equations . 27
– 4 – 60793-1-42 © IEC:2013
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
OPTICAL FIBRES –
Part 1-42: Measurement methods and test procedures –
Chromatic dispersion
FOREWORD
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