Multimode fiber cables are the type of fiber cables that transmit data via their core of larger diameters enable an average, single-mode transceiver multiple modes of light to propagate through it. Let's break down these terms in simple, clear language with practical examples. 2-core o In optical modules, "core". Unlike single mode, multimode fiber (MMF) allows multiple light modes to transmit and pass through. That makes manufacturing easier and offers a lower cost ratio on the same length. While they may look similar from the outside, they differ significantly in core size, transmission behavior, distance capability, bandwidth potential, equipment requirements, and overall cost. This article will focus on the basic construction, fiber distance, cost, fiber color. An optical fiber is a cylindrical dielectric waveguide composed of a central core surrounded by cladding with a slightly lower refractive index.