IEC 61755-3-1:2024
(Main)Fibre optic interconnecting devices and passive components - Connector optical interfaces - Part 3-1: Connector parameters of dispersion unshifted single-mode physically contacting fibres - Non-angled 2,5 mm and 1,25 mm diameter cylindrical full zirconia ferrules
Fibre optic interconnecting devices and passive components - Connector optical interfaces - Part 3-1: Connector parameters of dispersion unshifted single-mode physically contacting fibres - Non-angled 2,5 mm and 1,25 mm diameter cylindrical full zirconia ferrules
IEC 61755-3-1:2024 defines the dimensional limits of the optical interface that are necessary for single-mode fibre optic connectors with 2,5 mm or 1,25 mm diameter cylindrical zirconia (ZrO2) ferrules to meet the specific requirements for fibre-to-fibre interconnection, as defined in IEC 61755-2-1. Ferrules made from the material specified in this document are suitable for use in all the operating service environments defined in IEC 61753-1. Ferrule dimensions and features are contained in the IEC 61754 series of fibre optic connector interface standards.
This second edition cancels and replaces the first edition published in 2006. This edition constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition:
a) normative references have been added;
b) the introduction of an additional optical interface with a different fibre core eccentricity profile. The previous revision of optical interface standard is named "Variant 1: with fibre core axis oriented towards the connector guide key". The additional optical interface is named "Variant 2: with fibre core axis not oriented towards the connector guide key";
c) statements added related to interoperability, where both variants remain intermateable within a given performance grade and backwards compatible to IEC 61755-3-1:2006;
d) The addition of Grade B and Grade C interface requirements for both variants;
e) The addition of a descriptive statistic for the mean fibre core eccentricity (mean value) to describe the distribution of fibre core eccentricity to ensure interoperability;
f) A new informative Annex B to give guidance on the expected attenuation when mated to a reference connector plug;
g) A new informative Annex C to give guidance related to the simulation of optical interface attenuation;
h) A new informative Annex D to give guidance related to estimation of mean fibre eccentricity limits for finite production batch sizes.
Dispositifs d'interconnexion et composants passifs fibroniques - Interfaces optiques de connecteurs - Partie 3-1 : Paramètres des connecteurs pour fibres unimodales à dispersion non décalée en contact physique - Ferrules cylindriques sans angle en zircone pleine de 2,5 mm et 1,25 mm de diamètre
IEC 61755-3-1:2024 spécifie les limites dimensionnelles des interfaces optiques à respecter pour que les connecteurs optiques à fibres unimodales équipés de ferrules cylindriques en zircone (ZrO2) d’un diamètre de 2,5 mm ou 1,25 mm répondent aux exigences particulières d’une interconnexion fibre à fibre telles que définies dans l’IEC 61755-2-1. Cette deuxième édition annule et remplace la première édition parue en 2006. Cette édition constitue une révision technique.
Cette édition inclut les modifications techniques majeures suivantes par rapport à l’édition précédente:
a) l’ajout de références normatives;
b) ’introduction d’une interface optique supplémentaire avec un profil d’excentricité du cœur de la fibre différent. La précédente révision de la norme relative aux interfaces optiques est désignée "Variante 1: avec l’axe de cœur de la fibre orienté vers le détrompeur du connecteur". L’interface optique supplémentaire est désignée "Variante 2: avec l’axe de cœur de la fibre non orienté vers le détrompeur du connecteur";
c) l’ajout de mentions liées à l’interopérabilité, où les deux variantes restent compatibles dans une classe de performance donnée et rétrocompatibles par rapport à l’IEC 61755-3-1:2006;
d) l’ajout d’exigences relatives aux interfaces de Classes B et C pour les deux variantes;
e) l’ajout d’une statistique descriptive pour l’excentricité moyenne du cœur de fibre (valeur moyenne) pour décrire la distribution de l’excentricité du cœur de la fibre afin d’assurer l’interopérabilité;
f) l’ajout d’une nouvelle Annexe B, informative, pour fournir des recommandations concernant l’affaiblissement attendu lors de l’accouplement avec une fiche de connecteur de référence;
g) l’ajout d’une nouvelle Annexe C, informative, pour fournir des recommandations liées à la simulation de l’affaiblissement de l’interface optique;
h) l’ajout d’une nouvelle Annexe D, informative, pour fournir des recommandations liées à l’estimation des limites d’excentricité moyenne de la fibre pour des tailles de lots de production limitées.
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IEC 61755-3-1 ®
Edition 2.0 2024-04
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Fibre optic interconnecting devices and passive components – Connector
optical interfaces –
Part 3-1: Connector parameters of dispersion unshifted single-mode physically
contacting fibres – Non-angled 2,5 mm and 1,25 mm diameter cylindrical full
zirconia ferrules
Dispositifs d'interconnexion et composants passifs fibroniques – Interfaces
optiques de connecteurs –
Partie 3-1 : Paramètres des connecteurs pour fibres unimodales à dispersion
non décalée en contact physique – Ferrules cylindriques sans angle en zircone
pleine de 2,5 mm et 1,25 mm de diamètre
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IEC 61755-3-1 ®
Edition 2.0 2024-04
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Fibre optic interconnecting devices and passive components – Connector
optical interfaces –
Part 3-1: Connector parameters of dispersion unshifted single-mode physically
contacting fibres – Non-angled 2,5 mm and 1,25 mm diameter cylindrical full
zirconia ferrules
Dispositifs d'interconnexion et composants passifs fibroniques – Interfaces
optiques de connecteurs –
Partie 3-1 : Paramètres des connecteurs pour fibres unimodales à dispersion
non décalée en contact physique – Ferrules cylindriques sans angle en zircone
pleine de 2,5 mm et 1,25 mm de diamètre
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 33.180.20 ISBN 978-2-8322-8584-8
– 2 – IEC 61755-3-1:2024 © IEC 2024
CONTENTS
FOREWORD . 3
1 Scope . 6
2 Normative references . 6
3 Terms and definitions . 6
4 Description . 6
5 Interface parameters . 7
Annex A (informative) Maximum allowed spherical fibre undercut . 12
Annex B (informative) Expected attenuation when mated to reference connector plugs . 14
Annex C (informative) Guidance related to simulation of optical interface attenuation . 15
Annex D (informative) Estimation of average fibre core eccentricity limits as a function
of batch size . 21
Bibliography . 24
Figure 1 – Connector plug endface dimensions . 8
Figure 2 – Geometric requirements for fibre core location after termination . 8
Figure 3 – Ferrule dimensions . 11
Figure A.1 – Allowable undercut as a function of endface radius and apex offset –
4,9 N minimum contact force . 13
Figure A.2 – Allowable undercut as a function of endface radius and apex offset –
2,9 N minimum contact force . 13
Figure C.1 – MFD distribution used in the design curve calculation . 16
Figure C.2 – Resultant fibre core to ferrule eccentricity distribution for Grade B
attenuation . 17
Figure C.3 – Resultant fibre angle distribution for Grade B attenuation . 17
Figure C.4 – Scatterplot of fibre core eccentricities for Grade B attenuation . 19
Figure C.5 – Histogram indicating attenuation distribution of a Grade B optical
interface, Variant 1 to Variant 2 . 20
Figure D.1 – Example histogram showing fibre core eccentricity mean distribution for
Grade B Variant 1 interfaces with a batch size of 25 . 21
Figure D.2 – Illustrative run chart of fibre core eccentricity for different batch sizes
which all conform to the mean and maximum limits . 23
Table 1 – Optical interface parameter values for 2,5 mm diameter ferrule . 9
Table 2 – Optical interface parameter values for 1,25 mm diameter ferrule . 10
Table 3 – Optical interface parameter values for PC ferrules . 11
Table B.1 – Descriptive statistics when performance grades are mated against a Grade
R1 reference interface . 14
Table C.1 – MFD and fibre core nominal index of refraction . 16
Table D.1 – Maximum allowable average fibre core eccentricity limit for different batch
sizes . 22
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
FIBRE OPTIC INTERCONNECTING
DEVICES AND PASSIVE COMPONENTS –
CONNECTOR OPTICAL INTERFACES –
Part 3-1: Connector parameters of dispersion
unshifted single-mode physically contacting fibres –
Non-angled 2,5 mm and 1,25 mm diameter cylindrical full zirconia ferrules
FOREWORD
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