IEC 61300-3-14-2025 PDF

Full title and description

St IEC 61300-3-14-2025 — Fibre optic interconnecting devices and passive components — Basic test and measurement procedures — Part 3‑14: Examinations and measurements — Error and repeatability of the attenuation settings of a variable optical attenuator. This edition defines a standardized method to measure attenuation-setting error and repeatability for variable optical attenuators (VOAs), covering manual and electrically controlled devices and both single‑mode and multimode fibre applications.

Abstract

This fourth edition (2025) provides procedures to quantify the difference between nominal attenuation settings and measured attenuation (attenuation error) and to characterise repeatability at individual settings. It includes apparatus and setup requirements, statistical definitions for repeatability, hysteresis measurement for electrically controlled VOAs (Annex B), and uncertainty considerations. The edition replaces the 2014 version and introduces several technical updates and clarified measurement requirements.

General information

• Status: Published / Valid (International Standard).
• Publication date: December 8, 2025.
• Publisher: International Electrotechnical Commission (IEC).
• ICS / categories: 33.180.20 (Fibre optic interconnecting devices and passive components).
• Edition / version: 4th edition (4.0).
• Number of pages: 27.

Scope

Specifies a method to measure the error (difference between nominal and measured attenuation) and the repeatability of attenuation settings for variable optical attenuators (VOAs). Applies to both manually and electrically controlled VOAs and to VOAs designed for single‑mode and multimode fibres. For electrically controlled VOAs, hysteresis characteristics are addressed in an informative annex. The document also adds calibration and uncertainty considerations relevant to test laboratories and manufacturers.

Key topics and requirements

• Definition and quantification of attenuation error (nominal vs measured setting).
• Statistical definition and measurement of repeatability at each attenuation setting (including notes permitting 2σ definition where applicable).
• Apparatus and test setup requirements: stable light source with specified launch conditions, reference fibre/joint, and power meter (terminology updated from "detector" to "power meter").
• Hysteresis measurement procedure for electrically controlled VOAs (Annex B).
• Uncertainty considerations and reporting requirements; details to be specified and recorded in test reports.
• Normative reference addition: IEC 61315 (Calibration of fibre‑optic power meters) referenced for calibration practices.
• Changes from previous edition: corrected figures/formulae, clarified multimode launch (EF) requirements, clause reorganisation and editorial corrections.

Typical use and users

Used by fibre‑optic component manufacturers, R&D teams, production and quality engineers, independent testing and calibration laboratories, and standards organisations to verify VOA performance and to generate repeatable, traceable test reports required for product specifications, acceptance testing and conformance. Test houses use it to define measurement procedures and uncertainty budgets for VOA characterization.

Related standards

Part of the IEC 61300 series of basic test and measurement procedures for fibre‑optic interconnecting devices. Directly references IEC 61315 (Calibration of fibre‑optic power meters) as a normative reference. Related parts include other IEC 61300 clauses on attenuation and examinations (for example IEC 61300‑3‑4 and other parts in the Part 3 subseries) and regional/adopted versions (EN/BS/DIN adoptions of IEC 61300‑3‑14 editions).

Keywords

Variable optical attenuator, VOA, attenuation error, repeatability, hysteresis, fibre optics, measurement procedure, power meter calibration, uncertainty, IEC 61300.

FAQ

Q: What is this standard?

A: IEC 61300‑3‑14:2025 (St IEC 61300-3-14-2025) is the 4th edition of the IEC test method for measuring error and repeatability of attenuation settings of variable optical attenuators (VOAs), published as an international standard in December 2025.

Q: What does it cover?

A: It covers measurement procedures, apparatus and reporting for attenuation‑setting error and repeatability for manual and electrically controlled VOAs for single‑mode and multimode fibres, plus hysteresis measurement (Annex B) and uncertainty/certification considerations.

Q: Who typically uses it?

A: Fibre‑optic component manufacturers, test and calibration laboratories, quality and production engineers, researchers working on VOA design and characterization, and conformity assessment bodies.

Q: Is it current or superseded?

A: Current — the 2025 4th edition (published December 8, 2025) supersedes the 2014 edition and is the active international publication until stability review (stability date noted as 2031 by the publisher).

Q: Is it part of a series?

A: Yes — it is part of the IEC 61300 series (Basic test and measurement procedures for fibre‑optic interconnecting devices and passive components). Many parts in the series address related examinations and attenuation measurements for connectors, components and assemblies.

Q: What are the key keywords?

A: Variable optical attenuator, VOA, attenuation error, repeatability, hysteresis, power meter, calibration, uncertainty, fibre‑optic test methods, IEC 61300.