Logic Gates Through Three Core and Dual Core Nonlinear Directional Couplers Operating in Continuous Wave Mode

We have studied and obtained logic gates through three-core nonlinear directional couplers and dual-core nonlinear directional couplers operating in continuous wave mode in which the laser signal has the same wavelength. In symmetrical three-core nonlinear directional couplers with its identical cores in a planar arrangement was studied using a control pulse applied to the first core. In dual core the structure was the asymmetric two core switching process was held in symmetrical triangular fiber couplers and three-core nonlinear directional couplers using the coupled mode of the nonlinear Schrodinger equation. The logic gates, AND, OR and NXOR were generated from the triangular three-core nonlinear directional couplers, while planar three-core nonlinear directional couplers produced logic gates AND, NAND, OR and XOR. For this two basic modes were considered. The first triangular structure with three symmetrical core were considered from an equilateral triangle and used a control signal applied to the first core. In the second model the symmetric cross structure with three cores in a parallel equidistant arrangement. We have obtained optical logic gates in a fiber coupler doped with erbium, leaded the resonant non linearity to change the refractive index which helped to reduce the device switching energy threshold. How to cite this article: Yadav UK, Singh OP. (2022). Logic Gates Through Three Core and Dual Core Nonlinear Directional Couplers Operating in Continuous Wave Mode. Bulletin of Pure and Applied Sciences- Physics, 41D (1), 1-7. Keywords Logic gate, Core, nonlinear, coupler, control pulse, symmetric, switching, directional, control signal, mode.