Patent ID: 6556730
Filing Date: 2003-04-29
Classification: B41J,G02B,G02F

Abstract:
An optical device comprising:a multiplicity of electrically controlled waveguides formed on at least one gallium arsenide substrate, each of said at least one substrate comprising layers of materials arranged to confine an electrical field in a relatively small thickness and wherein the said layers include: an N-doped gallium arsenide substrate; an N-doped aluminum gallium arsenide layer formed over said substrate; an N-doped gallium arsenide layer formed over the N-doped aluminum gallium arsenide layer; a P-doped gallium arsenide layer formed over the N-doped gallium arsenide layer; a P-doped aluminum gallium arsenide layer formed over the P-doped gallium arsenide layer; and a P-doped gallium arsenide layer formed over the P-doped aluminum gallium arsenide layer; and a polarization rotator for rotating the polarization of light passing through said multiplicity of electrically controlled waveguides.