Abstract
The extreme versatility of the internal conical refraction in biaxial crystals in thetransformation of Gaussian laser beams is demonstrated and discussed. By means ofsimple variations in the focusing and polarization of the input beam, various beamconfigurations like Bessel–Gauss, Hermite–Gauss, Laguerre–Gauss, and othersare shown to be produced from a lowest-order Gaussian beam passed through abiaxial crystal along one of its optical axes. Further transformations of the beamprofile and formation of more complex light patterns were obtained in a cascadedscheme, when the beam was passed consecutively through two crystals. Theseobservations, together with the known ability of conical refraction to form a variety ofother complex light structures, demonstrate the unique properties of the effectin manipulations with the amplitude, phase, and polarization of light beams.
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