IEC 61755-2-2-2022 PDF

Full title and description

St IEC 61755-2-2:2022 — Fibre optic interconnecting devices and passive components — Connector optical interfaces for single-mode fibres — Part 2-2: Connection parameters of dispersion unshifted physically contacting fibres — Angled. The standard defines prescribed conditions and performance grades to characterise attenuation and return loss for randomly mated pairs of angled polished physically contacting (APC) single-mode fibres, using a Gaussian model of optical power distribution and parameters such as mode field diameter, lateral and angular core offsets.

Abstract

IEC 61755-2-2:2022 (edition 2.0) provides connection parameter definitions and the test/model conditions required to evaluate attenuation and return loss performance for APC single‑mode fibre connections. It replaces the 2006 edition, adds normative references and visual requirements, and refines text to reduce misinterpretation. The document links connector interface geometry and fibre mode-field characteristics to performance grades referenced in IEC 61755-1.

General information

• Status: Published — current international standard (edition 2.0).
• Publication date: 14 September 2022.
• Publisher: International Electrotechnical Commission (IEC).
• ICS / categories: 33.180.20 (Fibre optic interconnecting devices and passive components).
• Edition / version: Edition 2.0 (2022).
• Number of pages: 21.

Scope

This part of IEC 61755 specifies a set of prescribed conditions and a modelling approach to determine attenuation and return loss performance for dispersion-unshifted single‑mode fibres terminated with angled polished, physically contacting (APC) connectors. The standard uses a Gaussian distribution model of the launched mode (characterised by mode field diameter, MFD) and quantifies how MFD mismatch, lateral core offsets and angular offsets between fibres affect attenuation grades; return loss grading is also defined (see IEC 61755-1 for grade definitions). The document is intended for characterising randomly mated connector pairs under defined conditions and for relating connector/fibre geometry to optical performance.

Key topics and requirements

• Definition of connection parameter conditions for APC (angled polished, physically contacting) single‑mode fibre connections.
• Attenuation performance grading tied to mode field diameter (MFD) mismatch and lateral/angular core offsets.
• Return loss performance classification for randomly mated angled connectors.
• Use of a Gaussian optical power distribution model for performance estimation and grade determination.
• Normative references, visual requirements and clarifications to reduce misuse of the standard (technical revision vs. 2006 edition).

Typical use and users

Manufacturers of fibre‑optic connectors and ferrules, test and certification laboratories, network equipment designers and installers, standards committees, and procurement/specification teams use this standard to specify connector optical-interface parameters, verify connector compatibility and predict connection attenuation/return loss when mating APC single‑mode connectors. It is also used by test engineers to design measurement programmes and by conformity assessment bodies.

Related standards

Key related documents include IEC 61755-1 (Optical interfaces for dispersion‑unshifted fibres — general and guidance, including grade definitions) and parts of the IEC 61755 series that define connector ferrule geometry and dimensional limits (for example IEC 61755-3-2 for angled ferrules); the IEC 61754 series (connector interface dimensions) and IEC 61753-1 (environmental categories and performance classes) are also often referenced. Regional/adopted versions and related national adoptions (for example ANSI/TIA adoptions) exist.

Keywords

APC, angled polish, physically contacting, single-mode fibre, mode field diameter (MFD), attenuation grade, return loss (RL), connector optical interface, IEC 61755, ferrule geometry, connector compatibility.

FAQ

Q: What is this standard?

A: IEC 61755-2-2:2022 is an international standard that specifies connection parameters and prescribed conditions used to evaluate attenuation and return loss for angled polished, physically contacting (APC) single‑mode fibre connections.

Q: What does it cover?

A: It covers the modelling approach and prescribed conditions (including MFD, lateral and angular offsets) for determining attenuation performance grades and return loss for randomly mated APC single‑mode fibres; it also includes normative references and visual requirements introduced in the 2022 revision.

Q: Who typically uses it?

A: Connector and ferrule manufacturers, test laboratories, network equipment designers and installers, standards developers, and procurement/specification teams use it to ensure connector interoperability and to specify/verify optical performance.

Q: Is it current or superseded?

A: It is the current edition (edition 2.0, published September 14, 2022) and it cancels and replaces IEC 61755-2-2:2006 (withdrawn on publication of the 2022 edition). The IEC entry indicates the 2022 edition as the active document.

Q: Is it part of a series?

A: Yes — IEC 61755 is a multi‑part series covering connector optical interfaces; IEC 61755-1 provides general guidance and grade definitions, other parts (for example IEC 61755-3-2) define ferrule dimensional limits and related connector interface parameters that work together with 61755-2-2.

Q: What are the key keywords?

A: APC, angled polish, physically contacting, single‑mode, MFD, attenuation grade, return loss, connector optical interface, IEC 61755.