Propagation of laser radiation in anisotropic media
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Weakly nonparaxial master equations are obtained for transverse components of the electric field envelope of laser beams and pulses propagating in an anisotropic medium with frequency dispersion and absorption (dichroism). It is demonstrated that, in the special case of a linear regime, the field is separated into ordinary and extraordinary waves and the propagation of the latter waves occurs through a mixed mechanism of diffraction and diffusion. It is shown that the derived equations are applicable to nonlinear-optical problems, including the description of the polarization structure of a soliton field in media with quadratic optical nonlinearity.
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