What types of modes are supported with optical fiber?
Fiber comes in two modes, multi and single; the difference between the two being in the diameter of the core, and the subsequent difference in amount of light transmission possible. Single mode core diameter is eight to ten micrometers or microns (µ), which supports one type of light transmission as opposed to multimode, with a core diameter of fifty microns (µ) or greater and able to transmit multiple modes of light.