All-optical switch based on gradient descent algorithm and implementation method thereof

Abstract

The invention discloses an all-optical switch based on a gradient descent algorithm and an implementation method thereof. A nonlinear calculation method is introduced into the gradient descent algorithm, a third-order nonlinear optical Kerr effect is utilized, the dielectric distribution condition of a nano-micro photon structure material is changed through third-order nonlinear optical response of a signal light excitation material, and the refractive index of a nonlinear material is related to strength under the action of signal light. The reverse design based on the gradient descent algorithm provides a universal platform for the realized photonic device, and facilitates the design and integration of a nanometer photonic device. The introduction of the nonlinear algorithm is beneficial to the design of more complex functional devices, the thought of device design is broadened, and the functions of device design are enriched; the introduction of a process optimization algorithm greatly reduces the efficiency of device optimization; the all-optical integrated device realized based on reverse design has wide application prospects in the fields of advanced photonic circuits, all-optical information processing, optical communication and the like.

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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