Statistical properties of laser light doubly scattered by two diffusers ordered along the optical axis are studied. If the first and the second diffusers are both in motion, it is well known that the doubly scattered amplitude does not generally obey Gaussian statistics. However, if the first diffuser remains in motion and the second diffuser is fixed at the experimental system, then the doubly scattered amplitude is shown to obey circular Gaussian statistics. Although the moment of the intensity fluctuation is independent of the surface roughness of the second diffuser, it is shown that the spatial-intensity correlation function depends on the surface roughness.
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Yoshimura et al. (1992) studied this question.
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