In optical communications, a mode is defined by its spatial distribution and propagation characteristics. The mode of a light signal determines how it interacts with the fiber and other components in the optical network. Fiber is preferred. Single mode fiber optic cable is made up of a small diameter glass or plastic core surrounded by cladding, which is a layer of reflective material. This small diameter core, typically around 9 microns in diameter, allows only one mode of light to pass through, resulting in a narrower beam of light. In the realms of connectivity and telecommunications, Fiber Optic Network basically specifies and analyses the modes of propagation on optical fiber. Certainly, optical fibers are the reason for existence of modern day communication systems cause they are carrying immense volumes of data through. Figure 1.
[PDF Version]