Q: Can I use a multimode transceiver on single mode fiber optic cable? A: Generally speaking, the answer is "no". However, the opposite will work. Multimode fiber (MMF) is an optical fiber designed to carry multiple light propagation paths—or modes—simultaneously. This is made possible by its relatively large core diameter, typically 50 or 62. 5 microns, compared to the ~9-micron core in single-mode fiber. Multi-mode fiber has a fairly large core diameter that enables multiple light modes to be. There are different types of fiber optic cables because each type is optimized for specific applications that have unique requirements for bandwidth, transmission distance, and environmental factors. But expect power loss, CRC errors, and unstable connectivity.