Design and analysis of all-optical 4-2 binary encoder based on photonic crystal

摘要

In this paper we theoretically propose combining optical waveguides with nonlinear photonic crystal based ring resonators for realizing an all optical 4-2 encoder. Nonlinear resonant rings are constructed from GaAs as the material used for dielectric rods. By application of optical beam to input ports of the structure the on/off states are realized and the resulting truth table confirms functionality of proposed device. The switching threshold and time delay of the device are about 1 kW/µm~2 and 1 ps, respectively. The normalized power at the output ports for all the ports in ON states is the same and equal to 60%.