PhC-based Majority Gate using a nonlinear directional coupler

Abstract

Wide bandwidth and high data transfer rates are essentialadvantages of optical telecommunication networks. Fullexploitation of the benefits of optical communicationsrequires a fully optical network. All-optical circuits areone of the main alternatives to eliminate the limits ofelectronic circuits and provide high-speed processingsystems. This study aims to design an Majority Gate basedon the Nonlinear Kerr Effect. The proposed structureincludes a directional coupler with nonlinear rods. In theproposed structure, a nonlinear directional coupler is usedto transmit the phase of the input signal. Also, inputconnections are optimized to prevent the return of lightalong the structure. To evaluate the operation of theproposed structures, PWE and FDTD methods are used.The effect of some parameters variation on the outputpower has been investigated, proving the robustness of thisdesigned structure of Majority gate against processvariation. In this simulation, the proposed structures'switching power is 3 W and the bit rate is Tbits/s.

Keywords

• photonic crystal
• all-optical majority gate
• nonlinear directional coupler