SQUEEZING ENHANCEMENT BY COMPETING NONLINEARITIES - ALMOST PERFECT SQUEEZING WITHOUT INSTABILITIES

The competition between the chi((2)) nonlinearity of a resonant second -harmonic-generation (SHG) system and an added chi((3)) nonlinearity s hifts the Hopf bifurcation of the standard SHG towards higher photon n umbers eventually completely stabilizing the system. Remarkably, perfe ct squeezing survives the stabilization. Two important consequences ar e discussed, namely, efficient bright squeezing generation and strong suppression of the excess noise which, for parameters corresponding to an experiment reported in the literature, can be reduced by two order s of magnitude without diminishing the squeezing. Possible experimenta l implementations are finally discussed. [S1050-2947(97)05112-3].