Abstract: Comparative study of propagation of circular Airy beams and Gauss-Laguerre beams in a parabolic fiber Evgeny Monin 1_8 Approach for finding amplitudes of the transmitted diffraction orders in the framework of a rigorous coupled wave analysis Artem Antonov 1_9 Integrated spectral filters consisting of several dielectric ridges on the surface of a slab waveguide Evgeni Bezus, Dmitry Bykov, Leonid Doskolovich 1_10 The formation of diffraction-free beams with a given distribution based on the Whittaker integral Pavel Khorin, Andrey Ustinov 1_11 The investigation of the cylindrically polarized beams focusing by a diffractive axicon using highperformance computer systems Dmitry Savelyev 1_12 Propagation of optical vortices in loop resonators on the basis of multimode optical fibers Constantine Alexeyev, Elena Barshak, Dmitriy Vikulin, Boris Lapin, Maxim Yavorsky 1_13 Topological charge and other Invariants of Gaussian vortex light fields and their superpositions