While multimode fiber distance is well-suited for short-range, high-speed connections, single mode fiber distance excels in long-distance and high-bandwidth applications. Bandwidth plays a crucial role in determining fiber distance, especially for multimode fiber. Multimode fiber has a bigger core. It lets light travel in many paths. There are three main reasons for this: Firstly, the higher the power, the lower the loss of the. Whether you are expanding a data center, upgrading an enterprise LAN, or building long-distance backbone connections, choosing between single mode fiber (SMF) and multimode fiber (MMF) is one of the most important design decisions.