Overview
IEC TR 61931:1998 - Fibre Optic Terminology is an internationally recognized technical report published by the International Electrotechnical Commission (IEC). This document provides a comprehensive set of terms and definitions relating to fibre optic elements, devices, and systems. It serves as an authoritative source for anyone involved in the field of optical fibre communication, facilitating consistent understanding and application of terminology across technical documents, standards, and industry communications.
By consolidating fundamental terminologies and referencing related standards, IEC TR 61931 supports the harmonization and clarity crucial to the rapidly evolving field of fibre optics.
Key Topics
IEC TR 61931:1998 covers a broad spectrum of terminology essential to the fibre optic industry, including:
- General Concepts: Definitions related to electromagnetic radiation, photons, optical spectrum, monochromatic radiation, and key physical principles of optics.
- Propagation Characteristics: Terms detailing how light and optical signals travel through fibre materials.
- Fibre and Cable Characteristics: Terminology associated with the physical and performance attributes of optical fibres and cables.
- Active and Passive Components: Concepts for various devices used within fibre optic systems, including light sources, detectors, amplifiers, and other optical components.
- Measurement Techniques: Terms related to the methods and processes for measuring fibre optic parameters.
- System Definitions: Higher-level system terms for integration, network applications, and performance assessment.
- Reference to Symbol Usage: Guidance on graphical and letter symbols as standardized by IEC for consistency.
Each section is designed to standardize the language used across the global fibre optics sector, minimizing ambiguity and errors in technical communication.
Applications
IEC TR 61931:1998 has practical value for a wide range of stakeholders in fibre optics, such as:
- Technical Documentation: Ensures consistent terminology in manuals, datasheets, training materials, and technical specifications.
- Standard Development: Provides a terminological foundation for writing new standards and aligning with existing ones, especially relevant for committees and working groups.
- Research and Development: Supports academia and R&D teams in accurately describing optical fibre phenomena and system designs.
- Product Development: Assists manufacturers in clearly specifying optical fibre components, reducing misunderstandings and rework in procurement or system integration.
- Testing and Measurement: Guides testing laboratories in the correct use of terms for reporting results, helping align test methods and parameter descriptions.
By adopting this standardized vocabulary, organizations can improve communication efficiency, reduce risk of interpretation errors, and ensure global interoperability in fibre optic technologies.
Related Standards
IEC TR 61931:1998 references and aligns closely with several key international standards:
- IEC 60050(731): International Electrotechnical Vocabulary (IEV) – Chapter 731: Optical Fibre Communications, which serves as a foundational source for many definitions.
- ITU-T Recommendation G.650: Focuses on definitions and test methods for parameters of single-mode optical fibres.
- ITU-T Recommendation G.651: Covers characteristics of multimode graded index optical fibre cables.
Additional alignment with standards such as IEC 60027 (Letter symbols for electrical technology), IEC 60417 (Graphical symbols for use on equipment), and IEC 60617 (Graphical symbols for diagrams) helps further ensure cohesive documentation and symbol usage.
Adopting IEC TR 61931:1998 as a reference improves the reliability, consistency, and clarity of technical communication in the global fibre optic sector, establishing common ground for manufacturers, researchers, regulators, and service providers.