Implementation method and device for full-adder and full-subtractor

Abstract

The invention discloses an implementation method and an implementation device for a full-adder and a full-subtractor. According to the method, three input optical signals are processed by utilizing third-order nonlinear effects in nonlinear waveguides to obtain the output of the full-adder and the full-subtractor. The device comprises first to sixth light wavelength division multiplexers, first to third nonlinear waveguides, first to third polarization controllers, a polarization analyzer, a first light wavelength division multiplexer and a second light wavelength division multiplexer. Compared with other devices for implementing an all-optical full-adder and an all-optical full-subtractor, the device processes three paths of input optical signals by utilizing three nonlinear waveguides to realize the logic operation of full-addition and full-subtraction. Ultra-quick response nonlinear effects are adopted, and the method and the device are applied to the processing and computation of high-speed optical signals. The method and the device are easy to implement, and can work under a high-speed condition. Logic information carried by two wavelengths is converted into a wavelength conversion process of a single wavelength, so that the quality of the signals can be recovered, the extinction ratio of output signals of the full-adder and the full-subtractor can be increased, and the application of the full-adder and the full-subtractor to an optical communication system is facilitated.

Description

technical field [0001] The invention relates to a method and device for realizing full addition and full subtraction logic operations on optical signals, which can be used in the fields of all-optical calculation and all-optical communication, and belongs to the technology in the field of all-optical logic gates. Background technique [0002] In the 21st century, people's demand for information is increasing day by day, and they have higher requirements for network transmission capacity and information processing rate. The all-optical network can provide high-speed and large-capacity transmission and processing capabilities, and can break through the speed bottleneck of the existing network's optical-to-optical conversion. All-optical computing plays an important role in all-optical networks, and all-optical full adders and all-subtractors are key devices for realizing all-optical arithmetic operations, and thus gain more and more attention. [0003] So far, all-optical ful...

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Problems solved by technology

[0003] So far, all-optical full-adder and full-subtractor are mainly based on cross-gain modulation in semiconductor optical amplifiers (document 1, L.Lei, et.al, "Reconfigurable photonic full-adder and full-subtractor based on three-input XOR gate and logic minterms", Electron.Lett.48, 399, 2012) and the second-order nonlinear effect in periodic polarization inversion lithium niobate (document 2, J.Shen, et.al, "All-Optical Full -Adder Based on Cascaded PPLN Waveguides", J.Quantum Electron.47, 1195, 2011), but their structures are relatively complex, and require four semiconductor optical amplifiers or five periodic polarization inversion lithium niobate cascades

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