Combined optical vortices in low-mode optical fibers

This paper devotes to a problem of the whole description of birth, death and explosion events of vectorial singularities in low-mode fiber vortex fields. Life tracks of these singular events are represented by terms of the vector Poynting fields, namely, there are current and pseudophase lines, and topological pseudocharges as well. All set of these vectorial singularities joins the total topological index and total topological pseudocharge conservation laws. As an example, it is discussed the Optical Rytov-Magnus effect and a topological birefringence for high-order vectorial vortices in a low-mode fiber.