Abstract

Using the linearized Langevin equations and spectral matrix, we calculated the squeezing spectra of the coupled mode in the output field for the process of parametric down-conversion with frequency degenerate but polarizations non-degenerate. The squeezing as a function of the driving field is obtained. We compare our results with that of the semiclassic and indicate that it is possible to generate a two-mode squeezed state with large amplitudes. The quantum correlation between the signal and the idler modes is also discussed.

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