IJLS Home • Issue Contents

Realization of All-optical Logic Gates by Cross Focused 𝑞-Gaussian Laser Beams in Nonlinear Optical Media
N. Gupta

This paper presents a simple and novel scheme to realize all-optical logic gates for fast switching. This can be obtained by sending two laser beams coaxially through nonlinear media with saturating optical nonlinearity. The nonlinearity in the optical properties on the medium is assumed to be cubic quintic nonlinearity. Approximate solutions of the nonlinear wave equations for the fields of incident laser beams have been obtained by using semi-analytical technique known as variational formalism. Emphasis is put on dynamical variations of beam widths of the laser beams with distance of propagation through the medium. It has been found that the weak beam modulates the intensity variations of the strong beam that gives rise to the possibility of an optical transistor. Combinations of these optical transistors can further be used to obtain logic gates.

Keywords: Laser beam, 𝑞-Gaussian, all-optical switching, transphasor, crossfocusing, nonlinear, analytical technique

Full Text (IP)