How many types of fibers are there?
There is truly only one fiber optic. The word "fiber optics" applies really to a stem of light physics dealing along with the properties of specific materials which display a phenomenon termed as "total internal reflection", and not to an object. Each optical element as lenses, rods and prisms use total internal reflection like a mechanism for light transportation. In the elements explained as fiber optics light travels through virtue of this effect but this does so in a number of manner; monomode, step index, multimode and gradient index.
For lighting purposes, for to be precise or, to handle visible light, the standard type or fibers are the supposed as multimode step index fibers. The utilization of the other types is confined exclusively to signal or data transmission.