Formation and Transformation of Non‐Bessel Multiring Light Beams

A method for forming multiring light beams (MRLB) on the basis of a biaxial crystal has been developed. The intensity distribution in output MRLBs depending on the parameters of the input light beam has been calculated. For the first time an optical scheme with three axicons for high‐efficiency transformation of the initial laser beam to a collimated light beam with wave‐front dislocation is proposed. The method permits obtaining powerful laser MRLBs which can be used in data transfer and processing systems, in nanotechnologies for manipulating particles, for technological treatment of materials, for acting on organic cells and their components, and for investigating inhomogeneities of transparent media.