Patent ID: 6878925

Claim:
An optical wiring circuit, comprising: a board; at least one planer optical waveguide disposed on a principal surface of the board; at least one first optical wave guide having a first end optically connected to the planer optical waveguide; and at least one second optical wave guide having a second end optically connected to the planer optical waveguide; wherein the first optical wave guide is extended toward one side surface of the board, and has a first other end, connected to the first end, being located in a neighboring portion of the side surface; the second optical wave guide is extended toward the side surface, and has a second other end, connected to the second end being located in a neighboring portion of the side surface; and a light diffusing member for diffusing a light beam is disposed between the planer optical waveguide and one of the first end and/or the second end, the light diffusing member being disposed at least at an end of the planer waveguide.