Exploring six modes of an optical parametric oscillator

Abstract

We measure the complete quantum state for six modes of the electromagnetic\nfield produced by an optical parametric oscillator. The investigation involves\nthe sideband of the intense pump, signal, and idler fields generated by\nstimulated parametric downconversion inside a triply resonant optical\nresonator. We develop a theoretical model to successfully interpret the\nexperimental results. The model takes into account the coupling of the field\nmodes to the phonon bath of the nonlinear crystal, clearly showing the roles of\ndifferent physical effects in shaping the structure of the quantum correlations\nbetween the six optical modes.\n