Patent ID: 7289703
Filing Date: 2007-10-30
Classification: G02B,G02F

Abstract:
1. An optical waveguide device, comprising: a substrate having an electro-optical effect; and a Mach-Zehnder type optical waveguide formed on said substrate and including a branching waveguide for branching propagation light into two propagation lights, two linear waveguides for propagating the two propagation lights branched by said branching waveguide, and a multiplexing waveguide for multiplexing the propagation lights from said two linear waveguides; said multiplexing waveguide including two input waveguides for inputting the propagation lights from said linear waveguides, a waveguide coupling element for coupling said two input waveguides with a distance d the distance d width w the length of said waveguide coupling element being set so that light propagating in one of said two input waveguides is branched to said two output waveguides with a power ratio of 1:1.