Abstract
The features of the three-wave parametric interaction in a medium with quadratic and cubic nonlinearities upon low-frequency pumping and nonzero detuning from the phase matching were studied. It has been shown that the common wave packet formed by the signal and idle waves is decayed into partial pulses, whose dynamics is determined by effective dispersion parameters. The presence of two types of nonlinearities extends the possibilities of controlling the dynamics of the forming partial pulses due to the variation of the pump wave power. The velocity of recession of partial pulses can reach large values and even exceed the speed of light in the vacuum.
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