Alieva Krasheninnikova, TatianaAbramochkin, EugenyAsenjo García, AnaRazueva, Evgeniya2023-06-202023-06-202010-02-151094-408710.1364/OE.18.003568https://hdl.handle.net/20.500.14352/44418© 2010 OSA. T. Alieva thanks Spanish Ministry of Education and Science (project TEC2008-04105/TEC).Based on the ray transformation matrix formalism, we propose a simple method for generation of paraxial beams performing anisotropic rotation in the phase space during their propagation through isotropic optical systems. The widely discussed spiral beams are the particular case of these beams. The propagation of these beams through the symmetric fractional Fourier transformer is demonstrated by numerical simulations.engjournal articlehttp://dx.doi.org/10.1364/OE.18.003568http://www.opticsinfobase.org/open access535Paraxial light-beamsSpiral-type beamsTransformationsÓptica (Física)2209.19 Óptica Física