An all-optical numerical comparator

Abstract

The invention relates to the field of all-optical logic processing and discloses an all-optical numerical value comparator. The all-optical numerical value comparator achieves comparison of numerical values of two input signals and comprises a non-linear optical waveguide, a semiconductor optical amplifier, a wave decomposition multiplexer, an optical filter and three optical couplers. The all-optical numerical value comparator is provided with three input ends, wherein two signal input ends are respectively used for inputting signal light A and signal light B, and the other input end is the probe light input end. The all-optical logic processing portion of the all-optical numerical value comparator adopts one non-linear optical waveguide and one semiconductor optical amplifier. The all-optical numerical value comparator is provided with three output ends and detects that input contents of the signal light A and the signal light B are '0' or '1' so as to distinguish A<B, A>B or A=B. Respective advantages of the non-linear optical waveguide and the semiconductor optical amplifier in the optical signal processing are combined, a structure is simplified, and integration is facilitated.

Description

technical field [0001] The invention relates to the field of all-optical logic processing, in particular to an all-optical numerical comparator. The device is based on nonlinear optical waveguide cascaded sum-frequency and difference-frequency (SFG+DFG) effects and semiconductor optical amplifier cross-gain modulation (XGM). ) effect, a numerical comparator with two input signals is realized. Background technique [0002] With the increase of network capacity and the continuous improvement of signal transmission and exchange rate, the bottleneck effect of electronics will become more and more obvious due to the limitation of integrated circuit processing technology and semiconductor material itself. In the future intelligent all-optical network, devices in the electrical field will be seriously troubled by electronic bottlenecks; in contrast, all-optical signal processing technology can give full play to the advantages of light waves in high-speed signal processing. Therefo...

AI Technical Summary

Problems solved by technology

This scheme has achieved relatively good results, but there are still some shortcomings. Because the four-wave mixing efficiency in the semiconductor optical amplifier is relatively low, the obtained AB results are weak, and the bit error rate is increased to make up for this deficiency. It is necessary to add an erbium-doped fiber amplifier after the semiconductor optical amplifier

The whole scheme needs three semiconductor optical amplifiers and one erbium-doped fiber amplifier, which makes the whole scheme more complicated

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