Generation of polarisation-squeezed light in a spatially periodic nonlinear optical medium with dissipation

An investigation is reported of the influence of losses and of thermal nois e in a cubically nonlinear medium with a periodically inhomogeneous linear susceptibility on the generation of polarisation-squeezed light. Calculatio ns are reported of the mean Stokes radiation parameters and of their varian ces. It is shown that the presence of losses is responsible for the existen ce of an interaction length optimal for suppression of fluctuations.