Optical waveguide device

Patent Pending PROBLEM TO BE SOLVED: To provide a method for manufacturing a novel optical waveguide device that facilitates installation of cores of different diameters and shapes into one optical waveguide device. ; SOLUTION: The method for manufacturing the optical waveguide device is characterized in that it has a step of making a first mold by dicing a substrate on the surface to form grooves thereon, a step of making a second mold for forming a clad by using the first mold, and a step of forming the clad of a high polymer material by using the second mold.