A Crystal Furnace Device Compensating the Gouy Phase Shift to Increase Nonlinear Interactions

Abstract

The invention belongs to the technical field of nonlinear optics, and in particular relates to a crystal furnace device for compensating Gouy phase shift to increase nonlinear interaction. The purpose of the present invention is to overcome the problem that the Gouy phase shift cannot be compensated by the Gaussian beam passing through the nonlinear crystal in the existing nonlinear optics experiments. Indium foil, upper Peltier element, second indium sheet, upper wedge-shaped metal furnace, third indium foil, nonlinear crystal, lower wedge-shaped metal furnace, fourth indium foil, lower Peltier element and fifth indium For the thin sheet, the inclined surfaces on the upper wedge-shaped metal furnace body and the lower wedge-shaped metal furnace body of the present invention are inclined backward and backward respectively, so that the nonlinear crystal is separated from the surface of the upper Peltier element and the lower Peltier element along the axial direction. The distance between them increases sequentially, so that the nonlinear crystal forms a temperature gradient along the axial direction.

Description

technical field [0001] The invention belongs to the technical field of nonlinear optics, and in particular relates to a crystal furnace device for compensating Gouy phase shift to increase nonlinear interaction. Background technique [0002] In the research field of nonlinear optics, the second harmonic generation process and the third harmonic generation process based on nonlinear interaction have been widely used in the preparation of light fields with different wavelengths. In addition, in the field of quantum optics, in non-classical light field experiments including the preparation of discrete variable multiphoton entangled states, it is first necessary to prepare the pump light field (second harmonic) required for the parametric down-conversion process based on nonlinear interactions . The high-quality nonlinear interaction process provides an effective basis for the preparation of high-performance non-classical light fields, and plays an important role in quantum int...

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Problems solved by technology

[0003] The purpose of the present invention is to overcome the problem that the Gouyi phase shift cannot be compensated caused by the Gaussian beam passing through the nonlinear crystal in the existing nonlinear optics experiment, and to provide a crystal furnace device that compensates the Gouyi phase shift and increases the nonlinear interaction

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