Reproduction of spatial and temporal structures of exciting radiation by parallel stimulated scattering under saturation conditions

Equations are derived for the coefficients of the correlations describing the spatial and temporal characteristics of the Stokes radiation under parallel scattering conditions. A solution of these equations shows that the reproduction coefficient $h$ rises and reaches a maximum when the quantum efficiency of the Stokes component is 0.5 and this is followed by a fall of $h$. The maximum value of $h$ depends on the intensity and reproduction coefficient of the input signal and may differ considerably from the value predicted by the theory postulating a constant field.