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

Spatial and temporal characteristics of a degenerate four-wave converter in multimode waveguide with resonant nonlinearity scheme counter-pumping waves are analyzed using the time response function point spread function. For single-mode pump equal mode numbers, dependences width on length, intensity first waves, number expansion object wave amplitude obtained for converter. The greatest contribution to is shown be from whose coincides waves. stationary model, taking into account spatial structure Gaussian leads monotonous decrease beam width, followed by constant value PSF module width. With An increase redistribution energy concentrated side maxima signal image improvement quality wavefront reversal model numbers.