Publications by authors named "Hassan Al-Ahsab"
This study introduces and experimentally demonstrates the concept of a modified anomalous vortex beam (MAVB), which carries orbital angular momentum (OAM) and exhibits unique self-focusing properties. By utilizing holographic techniques and customizing phase masks, we precisely control the beam's phase and intensity distribution, enhancing self-focusing behavior while preserving traditional anomalous vortex beam features. We derive an analytical formula to describe MAVB propagation within a paraxial ABCD optical system.
View Article and Find Full Text PDFUsing the extended Huygens-Fresnel principle, a cross-spectral density formula was developed for a Gaussian Schell model vortex (PCGSMV) beam diffracted through a lensacon (lens with an axicon). The intensity and depth of focus (DOF) shaped by the lensacon were calculated. Our numerical results show the relationship between the intensity distribution and depth of focus with the beam waist width as well as the spatial correlation of the coherence length.
View Article and Find Full Text PDFUnveiling detection probability for multi-Gaussian correlated anomalous vortex modes in maritime atmospheric turbulence.
J Opt Soc Am A Opt Image Sci Vis
December 2023
Article Synopsis
- - In this study, we use the Rytov approximation to analyze how well we can detect orbital angular momentum (OAM) in specific laser beams called multi-Gaussian correlated anomalous vortex (MGCAV) beams when affected by maritime atmospheric turbulence, which is not uniform like typical models suggest.
- - Our findings indicate that factors such as increased distance, beam order, and beam index reduce the OAM detection probability, while certain combinations of beam parameters can optimize this detection.
- - We also find that Gaussian-Schell correlated anomalous vortex (GSCAV) beams perform better than MGCAV beams in dealing with turbulence, offering potential applications for improving optical communication over water.