Patent ID: 6954568
Filing Date: 2005-10-11
Classification: G02B,G02F

Abstract:
1. An apparatus, comprising: a first optical waveguide section disposed in semiconductor material; second and third optical waveguide sections symmetrically disposed in the semiconductor material proximate to an end of the first optical waveguide section; first and second insulating gap regions disposed in the semiconductor material between the first and second optical waveguide sections and the first an third optical waveguide sections, respectively, such that there is a first evanescent coupling between first and second optical waveguide sections across the first insulating gap region and there is a second evanescent coupling between the first and third optical waveguide sections across the second insulating gap region; and an electrical circuit coupled to the first optical waveguide section, the electrical circuit coupled to drive the first optical waveguide section independent from the other waveguide sections to induce at least one of an optical delay and a phase shift into the first optical waveguide section.