SHOT-NOISE-CORRECTED MEASUREMENT OF THE G(2)(0) OF THE SPECKLE BACKSCATTERED FROM A ROTATING RANDOMLY ROUGH METAL-SURFACE

Abstract

The zero time-delay degree of second-order coherence g(2)(0) is investigated in the laser speckle field backscattered from a continuously rotating randomly rough aluminum metal surface. The s-polarized laser beam is incident with an angle of -30-degrees to the surface, and the angular distributions of the mean intensity and g(2)(0) are measured in the incidence plane. In obtaining g(2)(0) from the experimental data, the contribution of shot noise is subtracted from the photoelectric signal. It is found that the s and p components of the scattered light are close to those of the Gaussian light and that the measured g(2)(0) is consistent with the theoretical value.