Abstract
Our research concerns the problem of constructing multiple-twisted spiral beams and the geometry of their fine structure. We analyzed the distribution of energy flows in triangular spiral beams and critical points’ positions responsible for their structural stability. It was shown experimentally that a three-spot beam propagates without breaking the internal structure, while the intricate framing of a multiple-twisted triangular beam is distorted beyond the Rayleigh length. We associate such a structural violation with the imperfection of the holographic grating in the spatial light modulator.
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