Types of Multimode Fiber: Industry Standards and Classification

On this page:

• 1. Key Features of Multimode Fiber
• 2. Types and Classification (OM1–OM5)
• 3. Why It Matters for Network Planning

Multimode fiber (MMF) plays a critical role in short-distance high-bandwidth applications. Unlike single-mode fiber, MMF features a larger core diameter, allowing multiple light modes to propagate simultaneously. Below is a detailed breakdown of multimode fiber types, their performance standards, and key use cases in modern network infrastructure.

Key Characteristics and Applications

Multimode optical fibers are engineered for high-speed data transmission over relatively short distances. Standard core sizes are 50 µm or 62.5 µm, which enable multiple light paths (modes) to travel through the same fiber. Depending on the cable quality and installation, multimode systems can achieve bandwidths up to 28,000 MHz·km.

Due to the wide core diameter, MMF typically uses LEDs or VCSELs (Vertical-Cavity Surface-Emitting Lasers) as light sources, operating primarily at 850 nm or 1310 nm wavelengths.

The foundational standard governing multimode fibers is ITU-T G.651, but it's important to note that not all commercially available fiber types are explicitly listed within international standards. For project-specific compatibility and performance details, always refer to the manufacturer’s specification sheets.

While multimode fiber components are generally more affordable than single-mode, total deployment costs—including installation and future upgrades—may be higher due to limitations in scalability and reach.

Multimode Fiber Classification

By Refractive Index Profile:

By International Standards (ISO/IEC 11801):

Why This Matters

Understanding multimode fiber types and classifications is essential for ensuring optimal performance, cost-efficiency, and long-term scalability. Whether you're building out enterprise LANs, expanding campus fiber infrastructure, or deploying FTTD systems, selecting the appropriate OM standard (OM1 to OM5) directly impacts transmission distance, compatibility, and future upgrade paths.

To support your deployment, we offer a wide selection of ready-to-ship multimode fiber optic pigtails and patch cords, covering all major standards and connector types:

Multimode Pigtails (1.5 m, 0.9 mm buffered)

Multimode Patch Cords by LaserCords

Need something customized? Use our Patch Cord Calculator to configure fiber type, length, jacket, and connector options. We can manufacture cables tailored to your exact requirements — quick turnaround, high reliability, fully tested.

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