Wavefront detection method based on nonlinear interface Cherenkov frequency doubling
A wavefront detection, non-linear technology, applied in measurement devices, scientific instruments, measurement optics, etc., can solve the problems of complex measurement methods or recovery algorithms, difficult direct measurement, and limited thinking, so as to improve the resolution of wavefront detection. efficiency, corresponding simplicity, and the effect of simplifying the optical path
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[0026] A wavefront detection method based on Cerenkov frequency doubling of a nonlinear interface, where there is a sudden change in the nonlinear coefficient, which is obtained by bonding two nonlinear media or by performing multiple nonlinear crystals Polarization generates domain walls to obtain or set as the interface between nonlinear medium and air.
[0027] First, determine whether the nonlinear interface material is a normal dispersion material or an anomalous dispersion material, place the nonlinear interface above the platform, and adjust the incident angle of the fundamental frequency light incident on the nonlinear interface by moving and rotating the platform to ensure that the fundamental frequency light is incident on the non-linear interface. The linear interface generates nonlinear Cerenkov frequency doubled light, and the specific adjustment process is as follows: If the nonlinear interface material is a normal dispersion material, the fundamental frequency li...
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