Spatial and time characteristics of a four-wave radiation converter in a parabolic waveguide with resonant nonlinearity

Spatial and time characteristics of a four-wave radiation converter in a parabolic waveguide with resonant nonlinearity

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Spatial and temporal characteristics of a degenerate four-wave converter in a multimode waveguide with resonant nonlinearity in a scheme with counter-pumping waves are analyzed using the time response function and the point spread function.For single-mode pump waves with equal mode numbers, the dependences of the time response width on the waveguide length, the intensity of the first pump Zanussi ZUHE30FU2 Frost Free Upright Freezer - Stainless Steel Effect - A+ waves, and the mode number in the mode expansion of the object wave amplitude are obtained for the four-wave converter.The greatest contribution to the object wave amplitude is shown to be from the waveguide mode whose number coincides with the mode number of single-mode pump waves.

For the stationary model, taking into account the spatial structure of the Gaussian pump wave leads to a monotonous decrease with a decrease in the pump beam width, followed by a constant value of the PSF module width.With single-mode pump waves with equal mode numbers, An increase in the mode number of the pump waves leads to a redistribution of energy concentrated in the side maxima of the point signal image and improvement in the quality of the wavefront reversal for a model with single-mode pump waves with RangeCooker equal mode numbers.