Dynamics of Fractional Vortex Beams at Fraunhofer Diffraction Zone

Eduardo Peters*, Gustavo Funes, L. Martínez-León, Enrique Tajahuerce

*Autor correspondiente de este trabajo

Resultado de la investigación: Contribución a una revistaArtículorevisión exhaustiva

Resumen

Fractional vortex beams (FVBs) possess unique topological properties that are manifested in the vortex distribution. However, there are still discrepancies in the value of the vortex strength of FVBs at the far field. In this work we present a complete picture of the behavior of the phase singularities of non-integer (commonly known as fractional) beams in the Fraunhofer diffraction region and demonstrate a very good correspondence between experiments and simulations. As shown in the text, the original beam waist ω0 was found to be a key factor relating to the beam profile topology. This variable was measured in the process of calibrating the experiment. Finally, an experimental method to obtain the non-integer topological charge is proposed. This method only requires an analysis of the intensity, knowledge of the transition behaviors, and the beam waist.
Idioma originalInglés
Número de artículo479
PublicaciónPhotonics
Volumen9
N.º7
DOI
EstadoPublicada - jul. 2022

Nota bibliográfica

Publisher Copyright:
© 2022 by the authors.

Palabras clave

  • Singular optics
  • Optical vortices
  • Spatial light modulators

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