Patent ID: 7521725
Filing Date: 2009-04-21
Classification: G02B

Abstract:
1. An optical waveguide comprising: a core layer to be an optical waveguide region; upper clad and lower clad layers covering the core layer; a substrate and/or an upper substrate; and an ultraviolet control region for preventing ultraviolet light from entering, wherein said lower clad layer being disposed between said substrate and said core layer, and/or, said upper clad layer being disposed between said upper substrate and said core layer, said ultraviolet control region is formed from a metal alkoxide having a polymerizable group which is polymerized by light or heat and a metal alkoxide not having the polymerizable group, said ultraviolet control region being disposed at any one location between said lower clad layer and said substrate, between said lower clad layer and said upper clad layer, or between said upper clad layer and said upper substrate, and recesses and projections are formed on the surface of at least one side of said ultraviolet control region.