An all-optical switch based on gradient descent algorithm and its realization method

Abstract

The invention discloses an all-optical switch based on a gradient descent algorithm and a realization method thereof. The present invention introduces a nonlinear calculation method into the gradient descent algorithm, utilizes the third-order nonlinear optical Kerr effect, and changes the dielectric distribution of the nano-micro photonic structure material through the third-order nonlinear optical response of the signal light excitation material, Under the action of signal light, the refractive index of nonlinear materials is related to the intensity. The reverse design based on the gradient descent algorithm provides a general platform for the realization of photonic devices, which is conducive to the design and integration of nanophotonic devices; while the introduction of nonlinear algorithms It is conducive to the design of more complex functional devices, broadens the thinking of device design, and enriches the functions of device design; the introduction of process optimization algorithms greatly reduces the efficiency of device optimization; all-optical integrated devices based on reverse design are used in advanced photonic circuits , all-optical information processing, optical communication and other fields have broad application prospects.

Description

technical field [0001] The invention relates to a photon integrated circuit technology, in particular to an all-optical switch based on a gradient descent algorithm and a realization method thereof. Background technique [0002] The traditional micro-nano optical structure design is mainly based on the finite difference time domain (FDTD), finite element method, etc. to solve Maxwell's equations, but using these methods to design optical micro-nano structures usually involves a long process, especially in two-dimensional or three-dimensional In the structural design, the parameters are manually adjusted (such as the width of the waveguide, the size of the air hole and the micro-ring), and the structural parameters are optimized through repeated calculations. The inverse design method is more suitable for the design and optimization of optical micro-nano structures. It is an algorithmic technique for calculating unknown optical structures or optimizing known structures based ...

AI Technical Summary

Problems solved by technology

[0004] However, the existing algorithms are mainly based on the principle of linear optics, using the principles of interference superposition and scattering of light to realize device functions, and are limited to devices that can be realized according to the principle of linear superposition

However, the realization of optical switches, modulators, multifunctional devices and other devices needs to introduce nonlinear factors, so the existing reverse algorithm cannot be used to design such devices

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