IEC 61755-3-32:2015

Overview

IEC 61755-3-32:2015 is an international standard developed by the International Electrotechnical Commission (IEC) that specifies the dimensional limits and key parameters of angled physically contacting (PC) rectangular thermoset epoxy ferrules used in fibre optic interconnecting devices. This standard focuses on non-dispersion shifted single mode fibres with physically contacting fibre interfaces and applies to ferrules made of thermoset (TS) epoxy material.

The standard ensures fibre-to-fibre interconnection meets reliable and consistent performance requirements, especially for connector categories C, U, E, and O as defined in IEC 61753-1. It complements fibre optic connector interface standards contained within the IEC 61754 series.

Key Topics

• Angled PC Rectangular Thermoset Ferrules: Defines precise dimensional limits for angled ferrule interfaces which facilitate physical contact between single mode fibre ends, minimizing back-reflection and insertion loss.

• Dimensional Parameters: Focuses on dimensions critical to the optical interface, including fibre hole locations, ferrule geometry, alignment pin tolerances, and end face angles.

• Alignment Factors Affecting Performance:

  • Lateral Offset: Deviations of fibre holes from designated positions, core concentricity, and guide hole clearances.
  • Angular Offset: Fibre hole angular misalignment and precision of alignment pin diameters.
  • Longitudinal Offset: Fibre protrusion, fibre array coplanarity, end face angles and radii, and the axial force applied during mating.

• Material Specifications: Specifies the use of thermoset epoxy material for ferrules, ensuring compatibility with specified connector categories and mechanical reliability.

• Performance Impact Considerations: The standard includes informative annexes analyzing worst-case attenuation scenarios, minus coplanarity effects, and force characteristics needed for physical fibre contact.

Applications

IEC 61755-3-32:2015 is applicable in the design, manufacturing, and quality assurance of fibre optic connectors used in telecommunication, data communications, and high-speed optical networks that utilize non-dispersion shifted single mode fibres. Key applications include:

• Multi-fibre Connectors: Particularly connectors with single rows of up to 12 fibres, where precise physical contact is essential to maintain low optical attenuation and signal integrity.

• High-Performance Optical Networks: Ensures connector interfaces optimize fibre alignment and reduce return losses, critical in long-haul and metropolitan networks.

• Component Standardization: Facilitates interoperability among manufacturers and promotes universal compatibility of optical interconnection devices.

• Quality Control: Provides manufacturers and test laboratories with defined measurement procedures for ferrule dimensional conformity based on IEC normative references.

Related Standards

• IEC 61754 Series: Defines various fibre optic connector interfaces, including dimensions and configurations relevant to ferrule geometry and mechanical features.

• IEC 61753-1: Categories and environmental requirements for performance classes of fibre optic interconnecting devices.

• IEC 61755-1: General guidance on optical interfaces for single mode non-dispersion shifted fibres.

• IEC 60793-2-50: Product specifications for class B single-mode optical fibres that underpin the fibre types used in such ferrules.

• IEC 61300 (Parts 3-30 and 3-52): Basic test and measurement procedures related to the examination of polish angle, fibre position, and alignment pin deformation constants.

By adhering to IEC 61755-3-32:2015, manufacturers and designers are equipped to produce angled thermoset epoxy rectangular ferrule connectors that meet stringent international requirements. This standard supports enhanced optical performance in fibre optic interconnections by ensuring critical alignment parameters remain within predefined dimensional limits.

Keywords: angled PC rectangular thermoset ferrule, fibre optic interconnecting devices, non-dispersion shifted single mode fibres, optical interface dimensions, fibre alignment, IEC 61755-3-32, connector optical interfaces, thermoset epoxy ferrules, fibre-to-fibre interconnection, optical connector standards.