Optical NOT, NAND, XOR, and digital adder based on prism loaded multilayer slab waveguides and electro optic beam deflector

Simple and compact structure of thin film multilayer slab waveguide is used to implement the important logic functions. Solution of multilayer slab waveguides bounded modes by the thin-film matrix method is accommodated to verify the NAND, NOT, AND, XOR, and digital adder logic functions. The technique depends on selecting and switching the guided modes in the prism loaded multilayer slab waveguide by changing the input beam direction. The beam direction is controlled by an electro optic beam deflector (EOBD) and sometimes with assistance of special prism. This technique has the advantages of implementing more than one logic gate on the same structure in the same time, and the ability to reuse the same structure to implement many logic functions by only changing the input scheme.