Multimode and single mode fiber optic cable communication What is the difference?

Multimode fiber (Multi Mode Fiber): center glass core coarse (50 or 62.5μm), to be available for a variety of modes of light. But its mode dispersion larger, which limits the frequency to transmit digital signals, and with the increase in distance will be more severe. For example: 600MB/KM fiber only when the 2KM 300MBof bandwidth. Therefore, the multi-mode fiber transmission distance is morerecent, generally only a few kilometers.

Single-mode fiber (Single Mode Fiber): a very thin central glass core (core diameter typically 9 or 10μm), can only transfer a pattern of light. Thus, the mode dispersion is very small, for remote communication.