Deformation and collapse of the higher-order optical vortices obtained by large-angle diffraction in computer-generated holograms

Aleksandr Bekshaev; Oksana Orlinska

doi:10.1117/12.848199

31 December 2009 Deformation and collapse of the higher-order optical vortices obtained by large-angle diffraction in computer-generated holograms

Aleksandr Bekshaev, Oksana Orlinska

Author Affiliations +

Proceedings Volume 7388, Ninth International Conference on Correlation Optics; 738804 (2009) https://doi.org/10.1117/12.848199
Event: Correlation Optics 2009, 2009, Chernivsti, Ukraine

Abstract

Spatial characteristics of the optical-vortex (OV) beams created during the Gaussian beam diffraction by a grating with groove bifurcation are analyzed theoretically and numerically. In contrast to previous works, condition of small-angle diffraction is no longer required and the diffracted beam can be strongly deformed. This causes the intensity profile rotation and the high-order OV decomposition into a set of secondary single-charged OVs. These effects are studied quantitatively and confronted with similar properties of a Laguerre-Gaussian beam that undergoes astigmatic telescopic transformation. In contrast to the latter case, the secondary OVs do not lie on a single straight line within the beam cross section, and morphology parameters of the individual secondary OVs carried by the same beam are, in general, different. The results can be used for practical generation of OV beams and OV arrays with prescribed properties.

Citation Download Citation

Aleksandr Bekshaev and Oksana Orlinska "Deformation and collapse of the higher-order optical vortices obtained by large-angle diffraction in computer-generated holograms", Proc. SPIE 7388, Ninth International Conference on Correlation Optics, 738804 (31 December 2009); https://doi.org/10.1117/12.848199

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