Patent ID: 6862124
Filing Date: 2005-03-01
Classification: B82Y,G02F

Abstract:
1. A semiconductor optical modulation device as comprising: an optical waveguide having an optical axis, said optical waveguide formed on a surface of a semiconductor substrate; and at least two types of optical modulation elements formed on said semiconductor substrate, wherein said at least two types of optical modulation elements are arrayed so that there are a plurality of said optical modulation elements along said optical waveguide in the direction of said optical axis, wherein said two types of optical modulation elements comprise at least one first optical modulation element of a first capacitance and a first element length, and at least one second optical modulation element of a second capacitance and a second element length, and said device further comprises a metal wiring that makes an electrical connection of said first optical modulation element with adjacent one spaced apart with the second optical modulation element therebetween, wherein said second capacitance is smaller than said first capacitance.