Universal linear optical all-optical logic gate and implement method thereof

Abstract

The invention discloses a universal linear optical all-optical logic gate and an implement method thereof. According to the universal linear optical all-optical logic gate, a first logic input port, asecond logic input port and an invariant input port are adopted and connected to a main waveguide through first to third waveguides respectively, the main waveguide is connected to an output port, and therefore an all-optical logic gate structure is formed; the light intensity of first excitation light, the light intensity of second excitation light and the light intensity of third excitation light are adjusted separately, the phase difference from the first excitation light to the third excitation light is adjusted, optical-field complex amplitude which is contributed by the first and secondlogic input ports and the invariant input port to the output port is controlled, and therefore seven kinds of different linear optical all-optical logic gates are achieved on the single all-optical logic gate structure; regarding OR-logic gates, NOT-logic gates, XOR-logic gates, XNOR-logic gates and NAND-logic gates, under the two conditions that the output sates of the linear optical all-opticallogic gates are logic '1' and logic '0', theoretically, the maximum output signal beam intensity ratio is infinity.

Description

technical field [0001] The invention relates to linear optical technology, in particular to a general linear optical all-optical logic gate and its realization method. Background technique [0002] Logic gates are the basis of modern information technology. However, electronic logic gates based on electronic technology are facing bottlenecks in energy consumption, heat dissipation and response speed. All-optical logic gates based on photonics technology may become the technical basis of the next generation of information technology due to its low energy consumption, low heat dissipation and fast response. At present, there are two main directions of research on all-optical logic gates: the use of nonlinear optical effects and methods based on linear optics. Since the nonlinear optical coefficients of natural materials are relatively small, nonlinear optical effects require high working light intensity to obtain sufficient nonlinear effects, which severely limits the practi...

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Problems solved by technology

This kind of output signal intensity inconsistency for the same output logic state brings many difficulties to the practical application of logic gates

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