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This paper describes the characteristics of reflection and transmission when a three-dimensional Gaussian beam of fundamental mode is launched into a uniaxially anisotropic dielectric slab in which the optical axis has an arbitrary direction. The Fourier transform and solutions are obtained in integral form. Amplitudes of reflected and transmitted beams are calculated numerically by using FFT. To check the theory, experiment is performed by using laser and calcite. The numerical results are in nearly good agreement with the experimental ones. [ABSTRACT FROM AUTHOR]

This paper describes the numerical results and derivation of the partial reflected waves from a square-law medium in which a Gaussian beam is incident. First the WKB solution for the wave equation in the square-law medium is presented along with approximate solution for the first, second and third reflected waves can not be found by means of the WKB solution. An approximate expression for the partial reflected waves between two reflected beams is derived by Bremmer series. It is found that the partial reflected waves do not depend on the spot size of the beam and are basically proportional to the gradient of the permittivity. The theoretical results are in good agreement with the experimental results. [ABSTRACT FROM AUTHOR]