Single-mode fiber (SMF) supports distances up to 40-100+ kilometers for standard applications, while multimode fiber (MMF) is typically limited to 300 meters to 2 kilometers. Common applications include Local Area Networks. Fiber optic cables can be run anywhere from 2 kilometers to over 100 kilometers without signal regeneration, depending on the cable type and application. However, the dispersion-compensating fibers can support more than 200 kilometers. 5µm), multimode fibre allows multiple light paths (modes). As bandwidth increases, multimode reach decreases, which is why OM2, OM3, OM4, and OM5 standards define. They differ in core size, light source types, and what they can transmit. Core Size Evolution OM1 has a 62. OM2 through OM5 use a smaller 50 µm core.