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We analyze both theoretically and by means of numerical simulations thephenomena of filamentation and dynamical formation of self-guided nonlinearwaves in media featuring competing cubic and quintic nonlinearities. We providea theoretical description of recent experiments in terms of a linear stabilityanalysis supported with simulations, showing the possibility of experimentalobservation of the modulational instability suppression of intense light pulsestravelling across such nonlinear media. We also show a novel mechanism ofindirect excitation of {\em light condensates} by means of coalescenceprocesses of nonlinear coherent structures produced by managed filamentation ofhigh power laser beams.

Filamentation processes and dynamical excitation of light condensates in optical media with competing nonlinearities