In this article we study propagation of light in a circular array optical fiber and centrally coupled circular array optical fiber. Study the propagation of light in this structure was done by solving the propagation equations derived from the coupled-mode theory. When a single or few input Optical fibers are excited, light spreads over more and more optical fibers as it propagates through discrete diffraction. Evolution and spatial light distribution when input beam launched into Optical fiber on the ring or centrally fiber with or without the input angle of relative to the optical fiber the axis is very different.

Keywords: Centrally coupled circular fiber array, Circular fiber array, Coupling, Discrete diffraction, Input angle.

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