Multimode Fiber (MMF) has a core diameter, typically 50–100 micrometers, has ability to transfer multiple modes of light through the fiber core, uses lower-cost electronics (LED, VCSEL) operates at the 850 nm and 1300 nm wavelength and is used for short distance interconnections. Multimode Fiber (MMF) has a core diameter, typically 50–100 micrometers, has ability to transfer multiple modes of light through the fiber core, uses lower-cost electronics (LED, VCSEL) operates at the 850 nm and 1300 nm wavelength and is used for short distance interconnections. To recap Optical Fiber can be divided into Multimode Fiber (MMF) and Single-Mode optical fiber (SMF). There are several kinds of multimode fiber types available for high-speed network installations, and each with a different reach and data-rate capability. Multi-mode fiber has a fairly large core diameter that enables multiple light modes to be. This Applications Engineering Note (AE Note) discusses the criteria for properly selecting the optimal multimode fiber (MMF) for enterprise applications. What Is Multimode Fiber Optic Cable? Multimode fiber (MMF) optic cable. The Optical Fiber Reference Guide is intended to provide a comprehensive list of single mode and multimode optical fibers currently available from several of the world's leading manufacturers for Telecom, Data Center/Cloud, Defense, Financial, Utility, Research, and other high-speed communications.