Abstract: Increased light energy is introduced into the end of a fiber in a fiber optic light transmission system by this invention, thus providing further distances between repeater stations along long transmission paths and producing higher signal energy levels along the transmission path. This is achieved by presenting input modulated light from a ring shaped light emission pattern concentrically configured about a fiber near an end for receiving input light signals, and processing the modulated light from the ring pattern with an optical system including a parabolic reflector receiving the modulated light to direct and focus it upon the end of the fiber for transmission along the fiber. Light emitting semiconductors with ring shaped emission junctions about a central duct for passing a fiber provide more energy than conventional shapes in a manner that may be processed in a simple low loss optical system.