A thin film periodic polarization waveguide optimization method based on phase change material regulation

Abstract

The application discloses a thin film periodic polarization waveguide optimization method based on phase change material regulation. The method comprises the following steps: arranging a phase change material layer and a thin film periodic polarization nonlinear waveguide at intervals, inputting fundamental frequency light into the thin film periodic polarization nonlinear waveguide, generating initial phase change modulation parameters of the phase change material layer and acting on the phase change material layer, obtaining the output of the thin film periodic polarization nonlinear waveguide, adjusting the phase change modulation parameters of the phase change material layer according to the output of the thin film periodic polarization nonlinear waveguide, until a preset target is met, obtaining optimal phase change modulation parameters, and completing the optimization of the thin film periodic polarization nonlinear waveguide. The method provided by the application introduces adjustable phase change material at the nonlinear waveguide, and further combines a closed-loop feedback optimization method, so that the manufacturing deviation calibration and performance optimization of a nonlinear frequency conversion device are realized.

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