Manufacturing method of waveguide board, optical connector, and waveguide board

摘要

PROBLEM TO BE SOLVED: To provide a waveguide substrate capable of suppressing a connection loss of light, an optical connector using the waveguide substrate, and a method for manufacturing the waveguide substrate. A light-transmitting waveguide substrate 20 includes at least one waveguide 21 extending within the substrate. In at least one of the waveguides, the refractive index distribution along the radial direction is increased toward the center side in a predetermined section from the end on one side. The predetermined section has a length in which the light spread angle on one side of the waveguide is smaller than the light spread angle at the other end on the opposite side of the predetermined section from the one end. [Selection diagram] Fig. 4