Gradual loss of polarization in light scattered from rough surfaces: electromagnetic prediction.

Electromagnetic theory is used to calculate the gradual loss of polarization in light scattering from surface roughness. The receiver aperture is taken into account by means of a multiscale spatial averaging process. The polarization degrees are connected with the structural parameters of surfaces.

Nonlinear progressive waves in a slide trombone resonator.

The propagation of finite-amplitude waves inside a slide trombone is studied through direct pressure measurements corresponding to dynamic extremes. A two-microphone method is used to separate left-moving and right-moving waves inside the trombone, permitting the detection of nonlinear effects associated with progressive waves. It is found that a redistribution of energy across the spectrum toward the higher-frequencies occurs for large distances and high initial pressure levels.

Statistical signatures of random media and their correlation to polarization properties.

A single procedure based on speckle statistics is proposed to identify the scattering origins of light (surface or bulk). Successful results are obtained with high-scattering samples, which offers complementary techniques for imaging or characterization in random media. The speckle statistics are shown to be correlated to partial polarization.