IEC 60793-2-10:2017

Overview

IEC 60793-2-10:2017 is an international standard published by the International Electrotechnical Commission (IEC) that specifies product requirements for category A1 multimode optical fibres. This standard covers sub-categories A1a, A1b, and A1d multimode fibres used in information transmission equipment and optical fibre cables. It focuses on graded index fibres, with specific attention to 50/125 µm (A1a), 62.5/125 µm (A1b), and 100/140 µm (A1d) core/cladding diameters.

The 2017 edition is the sixth update of this standard and includes technical revisions, notably the addition of model A1a.4 fibre, which supports single or multi-wavelength transmission systems within the 850 nm to 950 nm wavelength range. This standard facilitates consistent quality and performance in multimode optical fibres, which are critical for high-speed data transmission networks.

Key Topics

• Sub-category Specifications:

  • A1a: 50/125 µm graded index fibre with four bandwidth grades (A1a.1 to A1a.4). Each grade has variants "a" (traditional macrobend loss) and "b" (enhanced low-loss macrobend).
  • A1b: 62.5/125 µm graded index fibre.
  • A1d: 100/140 µm graded index fibre.

• Bandwidth and Loss Performance:
  The standard defines bandwidth models tailored to different transmission needs with emphasis on macrobend loss performance, critical for maintaining signal quality in physically constrained environments.

• General, Mechanical, and Dimensional Requirements:
  Specifications include fibre core and cladding diameters, concentricity, tensile strength, and environmental resistance parameters suitable for robust installation and operational durability.

• Transmission Characteristics:
  Parameters such as differential mode delay (DMD), calculated effective modal bandwidth (EMB), and overfilled modal bandwidth (OMB) are established to ensure reliable data transmission with minimized modal dispersion.

• Environmental Testing:
  Fibres must meet optical performance and mechanical reliability under varying environmental conditions including temperature variations, humidity, and mechanical stress.

• Application-Specific Annexes:
  Normative and informative annexes provide detailed requirements for sub-categories, guidelines on system design considerations, and mapping to cabling categories and Ethernet applications ranging from 1 Gbps to 100 Gbps.

Applications

IEC 60793-2-10:2017 multimode fibres are designed for various short-reach, high bit-rate communication systems, including:

• Telephony and voice distribution networks
• Local Area Networks (LANs) and Storage Area Networks (SANs)
• Data centres and on-premises intra-building/inter-building fibre installations
• Private Branch Exchanges (PBX) and video services
• Multiplexing and other multi-service transmission platforms
• Outside plant and telephone cable infrastructure

The standard’s focus on graded index multimode fibres ensures compatibility with modern datacom and telecom requirements, supporting high-bandwidth, low-latency optical transmission over medium distances.

Related Standards

• IEC 60793-2: General requirements for optical fibre products, referenced for common attributes.
• ISO/IEC 11801-1: Relates to cabling categories and can be cross-referenced to fibre performance categories in IEC 60793-2-10.
• Ethernet Standards (IEEE 802.3): Compatibility with 1 Gigabit to 100 Gigabit Ethernet applications is detailed in the informative annexes for multimode fibres.

Benefits of IEC 60793-2-10:2017 Compliance

• Quality Assurance: Adherence guarantees consistent performance in multimode fibre manufacturing.
• Interoperability: Enables equipment and cable manufacturers to produce compatible components.
• Future-Proofing: Supports next-generation data transmission technologies with advanced fibre models (e.g., A1a.4).
• Environmental Robustness: Provides assurance of mechanical and environmental durability for diverse installation scenarios.

By following IEC 60793-2-10:2017 specifications, manufacturers and network designers achieve reliable, high-performance multimode optical fibre solutions essential for modern communication infrastructures. This standard remains a cornerstone for optical fibre quality, ensuring optimized data transmission and network longevity in increasingly demanding environments.