IEC 61755-3-2:2024 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 polished at an 8\u00b0 angle to meet the specific requirements for fibre-to-fibre interconnection, as defined in IEC 61755-2-2. Ferrules made from the material specified in this standard 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 are fully backwards compatible to IEC 61755-3-2:2006; d) The addition of Grade B and Grade C interface requirements for both variants; f) 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; g) A new informative Annex B to give guidance on the expected attenuation when mated to a reference connector plug; h) A new informative Annex D to give guidance related to estimation of mean fibre eccentricity limits for finite production batch sizes.<\/p>\n
| PDF Pages<\/th>\n | PDF Title<\/th>\n<\/tr>\n | ||||||
|---|---|---|---|---|---|---|---|
| 2<\/td>\n | undefined <\/td>\n<\/tr>\n | ||||||
| 4<\/td>\n | European foreword Endorsement notice <\/td>\n<\/tr>\n | ||||||
| 5<\/td>\n | Annex ZA (normative) Normative references to international publications with their corresponding European publications <\/td>\n<\/tr>\n | ||||||
| 6<\/td>\n | English CONTENTS <\/td>\n<\/tr>\n | ||||||
| 7<\/td>\n | FOREWORD <\/td>\n<\/tr>\n | ||||||
| 10<\/td>\n | 1 Scope 2 Normative references <\/td>\n<\/tr>\n | ||||||
| 11<\/td>\n | 4 Description 5 Interface parameters <\/td>\n<\/tr>\n | ||||||
| 12<\/td>\n | Figures Figure 1 \u2013 Connector plug endface dimensions Figure 2 \u2013 Geometric requirements for fibre core location after termination <\/td>\n<\/tr>\n | ||||||
| 13<\/td>\n | Tables Table 1 \u2013 Optical interface parameter values for 2,5 mm diameter ferrule <\/td>\n<\/tr>\n | ||||||
| 14<\/td>\n | Table 2 \u2013 Optical interface parameter values for 1,25 mm diameter ferrule <\/td>\n<\/tr>\n | ||||||
| 15<\/td>\n | Figure 3 \u2013 Ferrule dimensions Table 3 \u2013 Optical interface parameter values for APC ferrules <\/td>\n<\/tr>\n | ||||||
| 16<\/td>\n | Annex A (informative)Maximum allowed spherical fibre undercut <\/td>\n<\/tr>\n | ||||||
| 17<\/td>\n | Figure A.1 \u2013 Allowable undercut as a function of endface radius and apex offset \u20134,9 N minimum contact force Figure A.2 \u2013 Allowable undercut as a function of endface radius and apex offset \u20132,9 N minimum contact force <\/td>\n<\/tr>\n | ||||||
| 18<\/td>\n | Annex B (informative)Expected attenuation when mated to reference connector plugs Table B.1 \u2013 Descriptive statistics when performance grades are mated against a Grade R1 reference interface <\/td>\n<\/tr>\n | ||||||
| 19<\/td>\n | Annex C (informative)Guidance related to simulation of optical interface attenuation <\/td>\n<\/tr>\n | ||||||
| 20<\/td>\n | Figure C.1 \u2013 MFD distribution used in the design curve calculation Table C.1 \u2013 MFD and fibre core nominal index of refraction <\/td>\n<\/tr>\n | ||||||
| 21<\/td>\n | Figure C.2 \u2013 Resultant fibre core to ferrule eccentricitydistribution for Grade B attenuation Figure C.3 \u2013 Resultant fibre angle distribution for Grade B attenuation <\/td>\n<\/tr>\n | ||||||
| 22<\/td>\n | Figure C.4 \u2013 Scatterplot of fibre core eccentricities for oriented Grade B interfaces <\/td>\n<\/tr>\n | ||||||
| 23<\/td>\n | Figure C.5 \u2013 Histogram indicating attenuation distributionof a Grade B optical interface <\/td>\n<\/tr>\n | ||||||
| 24<\/td>\n | Annex D (informative)Estimation of average fibre core eccentricity limitsas a function of batch size Figure D.1 \u2013 Example histogram showing fibre core eccentricitymean distribution for Grade B interfaces with a batch size of 25 <\/td>\n<\/tr>\n | ||||||
| 25<\/td>\n | Table D.1 \u2013 Maximum allowable average fibre core eccentricity limit for different batch sizes <\/td>\n<\/tr>\n | ||||||
| 26<\/td>\n | Figure D.2 \u2013 Illustrative run chart of fibre core eccentricity for different batch sizes which all conform to the mean and maximum limits <\/td>\n<\/tr>\n | ||||||
| 27<\/td>\n | Bibliography <\/td>\n<\/tr>\n<\/table>\n","protected":false},"excerpt":{"rendered":" Fibre optic interconnecting devices and passive components.\u00a0Connector optical interfaces – Connector parameters of dispersion unshifted single-mode physically contacting fibres. Angled 2,5 mm and 1,25 mm diameter cylindrical full zirconia ferrules<\/b><\/p>\n |