Patent ID: 6603889
Filing Date: 2003-08-05
Classification: B82Y,G02B,G02F,H01L

Abstract:
An optical deflector that deflects an input optical signal by a deflection angle to generate a deflected output optical signal, comprising:a waveguide that includes an input port wherein the input optical signal is introduced into the waveguide, an output port wherein the deflected output optical signal exits the waveguide, and a region of deflecting propagation constant disposed along a length of the waveguide and between the input port and the output port, wherein the input optical signal is guided by total internal reflection in the waveguide, and the waveguide is formed at least in part from an active semiconductor; a first electrode positioned proximate a first surface of the region of deflecting propagation constant and electrically integrated with the active semiconductor; a second electrode in electrical contact with the active semiconductor and disposed on a first side of the region of deflecting propagation constant; a two-dimensional electron (hole) gas (2DEG) having a free carrier distribution that is formed on the first surface when a voltage is applied between the first electrode and the second electrode; and wherein changing the voltage causes a corresponding change of the free carrier distribution which, in turn, causes corresponding change of a propagation constant level in the region of deflecting propagation constant that adjusts the deflection angle applied to the input optical signal flowing through the waveguide.