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We study the stimulated emission of a two-level atom in an electromagnetic wave of circular polarization. The correlation function G(r1t, r2t) = of atom radiation fields at dipole approximation are computed. Under the resonance condition, the atom stimulated emission is influenced by the circularly polarized electromagnetic wave discussed. We have found that the time-averaged value of energy density does not depend on the initial conditions. We have also deduced the relation between the emission power of an atom and the Rabi frequency Ω.