OPTICAL VORTICES GENERATED IN MULTI-CASCADE OPTICAL SYSTEMS WITH TORSION-STRESSED LINBO3 CRYSTALLINE ELEMENTS.

This work theoretically tested the possibility of expanding the spectrum of vortex charges generated using multi-cascade optical systems based on LiNbO3 crystals twisted around their optical axis. As a result, analytical expressions for the electric field parameters of the output optical wave were obtained for the four main types of elementary cascades that allow the generation of vortices with charges +1 and –1 and also provide the matching of adjacent cascades in the multi-cascade optical system. At the same time, it was shown that when using the appropriate number of sequentially located cascades, each of which belongs to a certain type from the above, it is possible to generate a vortex beam with arbitrary integer vortex charges, including zero. Using the proposed cascade system, one can operate the outgoing beam parameters. This system can be used at the vortex beam multiplexing for information transfer. [ABSTRACT FROM AUTHOR]