Design of polarization switch in a single micro-ring resonator and its application to design all-optical logic OR/NOR gates using FDTD

Abstract

The present paper explain the demonstration of all-optical polarization switch in a single silicon micro-ring resonator also called optical ring resonator (ORR) with the application of suitable and optimized nature of polarized light as a pump pulse. The conversion of polarization states occur in the outputs of ORR. The “polarization-conversion” behavior with respect to change in nature of pump signal in the ORR is used to achieve various all-optical logic circuits. The projected optical switch is used to implement all-optical OR / NOR gate, in through port (TP) and drop port (DP)of the ORR simultaneously. The switching action with respect to time is reported in the article, to justify its behavior of an “all-optical switch”. The proposed architecture may be employed to implement other polarization-conversion dependent logic and arithmetic circuits. The results obtained from FDTD simulations verified the proposed method. Some ‘figure of merits’ are calculated and also discussed in the report to highlight its advantages.