The formation of a beam propagating in a slow-expansion mode on diffraction of a circular segment-shaped laser beam

  • Iosif ZeylikovichEmail author
  • Aleksandr Nikitin
Regular Article


The light field structure on diffraction of a circular segment-shaped laser beam was studied. At distances of 6–20 cm from a segment-shaped aperture obstructing a circular laser beam, the formation of the beam structure propagating in a slow-expansion mode was detected. The diffracted beam structure has been fully formed in the shadow region at a distance of 20 cm from the obstacle. In the boundary region of the aperture straight edge, the helical beams of the opposite topological charges were reconstructed by the theoretical 3-D propagation of the laser beam.

Graphical abstract


Optical Phenomena and Photonics 


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Copyright information

© EDP Sciences / Società Italiana di Fisica / Springer-Verlag GmbH Germany, part of Springer Nature 2019

Authors and Affiliations

  1. 1.Physics and Technology department, Yanka Kupala State University of GrodnoGrodnoBelarus

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