Patent ID: 8606054
Filing Date: 2013-12-10
Classification: G02F,Y10T

Abstract:
1. Optical frequency shifter comprising: an electro-optical substrate having a main surface; an optical waveguide structure formed in said substrate and having two waveguide portions, which are spaced apart by a distance such as to ensure mutual optical coupling therebetween; and an electrode structure arranged above said main surface of said substrate and having at least a first electrode, characterized in that said substrate has a Z-cut crystalline structure with Z crystal axis orthogonal to said main surface and comprises two oppositely poled portions having opposite orientations of said Z crystal axis; and in that said two waveguide portions are arranged underneath said first electrode, each in a respective one of said two oppositely poled portions, wherein the two wavequide portions are spaced for inducing a resulting optical frequency shift in an optical signal provided to the optical wavequide structure.