Quantum mechanics

Algorithm

Voltage

Engineering

Bit (key)

Computer science

Computer network

Physics

Nonlinear system

Mathematics

Optics

Nonlinear optical

Electronic engineering

Block (permutation group theory)

Comparator

Combinatorics

Binary number

Arithmetic

Electrical engineering

Photonics and Nanostructures - Fundamentals and Applications

All optical comparators play crucial roles in all optical data processing systems. In this paper we proposed a novel structure for realizing an all optical comparator, which can compares two 1-bit binary codes. For this purpose we used 4 nonlinear resonant rings. The final structure has two input –namely X and Y_ and three output ports –namely F1, F2 and F3-. The maximum time delay of the proposed structure is about 6 ps. The results show that, when X and Y are the same, only F3 is ON, when X is ON and Y is OFF, only F1 is ON and finally when Y is ON and X is OFF, only F2 is ON.

A novel proposal for all optical 1-bit comparator using nonlinear PhCRRs