All-optical logic gate device based on nanowire waveguides of multislot silicon substrate

Abstract

The invention discloses an all-optical logic gate device based on nanowire waveguides of a multislot silicon substrate, which is characterized by comprising two input waveguides, two output waveguides, first mode converters (51), a nonlinear directional coupler (6) and second mode converters (52). The input waveguides include a first input waveguide (1) and a second input waveguide (2) and are used for inputting signal optical pulses and controlling the optical pulses, the output waveguides include a first output waveguide (3) and a second output waveguide (4), the first input waveguide (1) and the second input waveguide (2) are respectively connected with the nonlinear directional coupler (6) by the first mode converters (51), and the nonlinear directional coupler (6) is respectively connected with the first output waveguide (3) and the second output waveguide (4) by the second mode converters (52). The all-optical logic gate device has the advantages of easiness in implementation, fast working speed, low power consumption, compact structure, cheap price and the like.

Description

technical field [0001] The invention relates to an integrated all-optical logic gate device applied in an optical communication system, an optical computer system and an optical signal processing system, and belongs to the technical field of integrated optics. Background technique [0002] All-optical logic gate is the basic unit in optical signal processing, and it is the key component to realize optical packet switching, optical computing and future high-speed and large-capacity optical network. The current all-optical logic gates mainly use nonlinear optical fibers, semiconductor optical amplifiers, and nonlinear waveguides as core devices to realize optical logic functions. Logic gates using nonlinear optical fibers mainly use the Kerr effect of optical fibers and have a faster working rate. However, logic gates with this structure require a lot of power consumption and long delays, and at the same time require longer optical fibers. To ensure its strong nonlinear effec...

AI Technical Summary

Problems solved by technology

The all-optical logic gate based on the SOI waveguide structure mainly uses the nonlinear optical effect of the silicon-based material to change the effective refractive index of the waveguide material to control the transmitted signal light, thereby realizing various logic operations. However, the operating speed of the logic gate will be limited by the current carrying capacity. Due to the limitation of sub-recombination time, it is difficult to realize ultra-high-speed all-optical logic operation. At the same time, the nonlinear effect of silicon-based materials is very weak, and the power consumption required for operation is large. Therefore, the traditional SOI waveguide structure is directly used to achieve high-speed and low-power All-optical logic gate design is impractical

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