Combinationial logic circuits with photonic devices

Abstract

ABSTRACTIn actual systems the optic signal are detected, processed and electronic recorded. These hybrid systems diminish considerably the processing speed of optical signals. So, it's absolute necessary to implement the processing signals of opticsystems which have to be competitive with the actual electronic systems. In this paper, the authors present from theoreticalpoint of view, the realization of some logical gates (AND, OR, NOT) with photonic devices and combinational logiccircuits with photonic devices as decoder, demultiplexer and multiplexer.Keywords: combinational logic circuits, logical circuits with photonic devices, optical logic circuits, optical computer. 1. INTRODUCTION The interaction of laser ray with matter goes to a wide spectrum of physics phenomenon in nonlinear optics' . The photonicmicrodevices with inferior power threshold which permit the propagation of laser pulses over a certain value of incidentpower can be realized using nonlinear optical mediums which are self-focusing. It can be realized optical power limitersusing nonlinear guided waves if one or both mediums which bounds a linear dielectric film are characterized as optical self-defocusing which are not linear. Using both nonlinear effects, which is threshold power and power limiters, it results thatonly optic pulses with the values of power into a certain interval can be transmitted through an optic wave guide which is