Single-Mode vs. Multi-Mode Fiber: Key Differences, Applications, and Selection Guide

As optical networks continue to expand rapidly to support higher bandwidth and longer transmission distances, understanding the difference between single-mode and multi-mode fiber becomes essential. These two types of fiber are the backbone of modern communication systems—from high-speed data centers to FTTH (Fiber to the Home) networks.

This article explains the structure, performance characteristics, and typical use cases of single-mode and multi-mode fiber. We’ll also discuss how to choose the right type for your specific application.