Patent ID: 9703172
Date: 2017-07-11
CPC Classifications: G02F

Claim:
1. An all-optical logic gate receiving amplitude-modulated first and second optical input signals, comprising: first and second optical input media receiving respective first and second optical input signals; a first combining medium optically coupled to the first and second optical input media to receive respective first and second optical input signals, the first combining medium generating a combined signal based on the first and second optical input signals; a first nonlinear element optically coupled to receive the combined signal from the first combining medium and having an optical resonator with a resonant frequency tuned relative to the frequency of at least one of the first and second optical input signals so that the first nonlinear element generates a first optical output signal having a high logic level if both of the optical input signals have low logic levels, and generates the first optical output signal having a low logic level if either or both of the first and second signals has a high logic level, the first optical output signal thus having a binary logic level that is amplitude-modulated; and at least one optical output medium optically coupled to receive and output the first optical output signal generated by the first nonlinear element, wherein the first and second optical input media, the combining medium, the first nonlinear element and the optical output medium are formed in a photonic crystal, and wherein the first nonlinear element is optically positioned between an output of the combining medium and an input to the optical output medium.