Patent ID: 7242821

Claim:
An optical mode converter for receiving an input light beam having an initial state of polarization (SOP) and for converting the initial SOP to a desired SOP, the optical mode converter comprising: an optical guiding layer having an optical waveguide formed from an electro-optic material, the optical guiding layer and waveguide having a layer with free carriers; and an electrode structure having two electrodes, each of the electrodes disposed on opposing sides of the optical waveguide and having a conductor strip with projections extending towards the optical waveguide, the electrode structure for producing an electric field across the waveguide upon application of a voltage signal, and for producing both an inductance and a capacitance, each electrode having a metal portion in contact with the layer having free carriers to form a Schottky barrier adjacent the waveguide to reduce accumulation of free carriers in the waveguide.