Superposing and modulating heterogeneous optical vortices of high-order orbital angular momentum

Abstract

This article reports the preparation of high orbital angular momentum (OAM) using non-uniform beam interference both theoretically and experimentally. This study commences with the reconstruction of Bessel–Gaussian vortex beams utilizing power-exponential-phase vortices. Subsequently, two reconstructed beams are used for interfere, followed by the application of the phase multiplication technique. This methodology enables higher-order operations on the interfered beams, thereby escalating their topological charges and facilitating the attainment of high-orbit angular momentum. The implementation of these methods is especially relevant in the realms of optical manipulation and remote sensing. Lastly, the high OAM optical vortex is subjected to rotation at any controllable angle. This manipulation introduces an additional degree of freedom for particle operations, thereby expanding their application prospects.