Patent ID: 7356224
Filing Date: 2008-04-08
Classification: G02B,G02F,H01S

Abstract:
1. An optical device comprising at least two waveguides in at least one propagation layer of grating material, a first one of said waveguides adapted for transporting input radiation from a first input port to output radiation exiting from a first output port and a second one of said waveguides transporting input radiation from a second input port to output radiation exiting from a second output port, and a one- or two-dimensional (binary) supergrating in a modulation layer of grating material for coupling input radiation propagating from one of said first and second input ports along a corresponding waveguide to the other of said first and second waveguides; and wherein said one- or two-dimensional supergrating comprises an array of discrete pixels and an array of controllable means each coupled to one of the discrete pixels, the controllable means being responsive to a set of control signals, for altering the modal index of refraction value in corresponding discrete pixels in said array in at least two modes.