The possibility of using digital holographic interferogram obtained via laser radiation at different wavelengths and different pulse lengths in different times for the reconstruction of dynamic phase changes was explored. The opportunities for applying the digital holographic interferometry method to the study of resonant mode shapes in resonant acoustic spectroscopy are shown. The results of experimental measurements and analytical calculations are submitted.
The process of parametric amplification of light from short laser pulses in nonlinear photonic crystals is analyzed numerically. The calculations were carried out taking into account the effects of the dispersion of the medium up to the third order and cubic nonlinearity of the Kerr type. It is shown that a change in the size of domains can significantly affect the formation of a signal wave pulse. On the basis of the results obtained, we analyzed the optimal values of the domain size at which the efficient energetic generation of the signal wave is observed.
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