Patent ID: 7582233
Filing Date: 2009-09-01
Classification: G02B,G02F

Abstract:
1. A method of manufacturing a directional coupler that includes a cladding material, a first waveguide layer, and a second waveguide layer, a part of the first waveguide layer and a part of the second waveguide layer overlapping each other to form an optical coupling section, and a separation material separating the first waveguide layer and the second waveguide layer at least at one end of the first waveguide layer and the second waveguide layer, the method comprising: forming the cladding material on a substrate by an ink-jet method; forming the first waveguide layer on the cladding material by an ink-jet method; forming the separation material on the first waveguide layer by an ink-jet method; and forming the second waveguide layer on the separation material and the part of the first waveguide layer by an ink-jet method, a width of the first waveguide layer and the second waveguide layer being configured to be narrower than a width of the substrate.