OR, XNOR, and NAND optical logic gates in Mach-Zehnder waveguiding structure consisting of nonlinear material

OR, XNOR, and NAND optical logic gates in Mach-Zehnder waveguiding structure consisting of nonlinear material had been analyzed by means of Finite Difference Beam Propagation Method (FDBPM). Nonlinear material is assumed to be a Kerrlike material which has a refractive index changes depending on the intensity of the local electric field from the input beam power. Here we use Organosol SnO₂ as film of waveguide. The Cladding is composed of linear material which has a little different with the film refractive index such as Flint Glass. The proposed waveguide is included by three input beams. Port 1 and 3 contribute as control signal which stable input power of 1 W/m and center input as input signal has varied power input value between 0 to 20 W/m. Output signal has measured just in port 5 (center output port). By investigation of the output power, the proposed structure of waveguide can generate optical logic for OR, XNOR and NAND operation. This paper represents that multi-functional devices such as OR, XNOR and NAND operation would also be possible in a single optical waveguide.