فيزياء الليزر
Using the Huygens-Fresnel diffraction integral, the electric field distribution of the Laguerre-Bessel-Gaussian (LBG) beam in a chiral medium is analytically expressed. The findings demonstrate that the LBG beam is divided into two parts: a right circularly polarized (RCP) beam and a left circularly polarized (LCP) beam. The chiral parameter, wavelength, and orders of the Bessel and Laguerre beams are affected by different propagation trajectories. The left circularly polarized beam was observed to accelerate more quickly than the right circularly polarized beam during propagation, and this acceleration was dependent on the chiral parameter. With an increase in the chiral parameter, the RLP beams decreased, and the LCP beams accelerated. The results of this investigation will be useful in optical manipulation and sorting applications.
F. Boufalah, L. Dalil-Essakali, A. Belafhal (2025). A new study on the interaction of structured Laguerre-Bessel-Gaussian beam with a chiral medium. Sana'a University Journal of Applied Sciences and Technology, 1187-1194. DOI: https://doi.org/10.59628/jast.v3i5.2320
F. Boufalah, L. Dalil-Essakali, A. Belafhal . “A new study on the interaction of structured Laguerre-Bessel-Gaussian beam with a chiral medium.” Sana'a University Journal of Applied Sciences and Technology, 2025, pp. 1187-1194. https://doi.org/10.59628/jast.v3i5.2320. Accessed 30 Oct. 2026.
F. Boufalah, L. Dalil-Essakali, A. Belafhal . 2025. “A new study on the interaction of structured Laguerre-Bessel-Gaussian beam with a chiral medium.” Sana'a University Journal of Applied Sciences and Technology : 1187-1194. DOI: https://doi.org/10.59628/jast.v3i5.2320
F. Boufalah, L. Dalil-Essakali, A. Belafhal (2025) ‘A new study on the interaction of structured Laguerre-Bessel-Gaussian beam with a chiral medium’, Sana'a University Journal of Applied Sciences and Technology, pp. 1187-1194. doi: 10.59628/jast.v3i5.2320
@article{jast2025_art2320,
author = {F. Boufalah, L. Dalil-Essakali, A. Belafhal },
title = {A new study on the interaction of structured Laguerre-Bessel-Gaussian beam with a chiral medium},
journal = {Sana'a University Journal of Applied Sciences and Technology}, year = {2025}, month = {October}, pages = {1187-1194}, doi = {10.59628/jast.v3i5.2320},
url = {https://doi.org/10.59628/jast.v3i5.2320},}
A new study on the interaction of structured Laguerre-Bessel-Gaussian beam with a chiral medium
Based on the mathematical framework of the partially coherent Gaussian Schell model vortex (PCGSMV) beam and the Huygens-Fresnel integral, we conducted a study to analyze the intensity distribution and depth of focus (DOF) of the PCGSMV beam as it propagates through a classical axicon. Our numerical results indicate the influence of factors such as the beam width, spatial degree of coherence, topological charge, and axicon base angle on the intensity distribution and DOF. In addition, we investigated the relationship between the beam spot size and propagation distance, as well as the effects of the spatial degree of coherence and propagation distance on the intensity profile. Our findings highlight the importance of the intensity values along the DOF for various applications, including the optical trapping and manipulation of micro particles.
H. O. Al-Nadary, Shukri kaid, Abdu A. Alkelly, Hassan T. Al-Ahsab, M. S. Qusaila (2024). Influence of astigmatic aberration on partially coherent Gaussian-Schell vortex beam focused by lensacon. Sana'a University Journal of Applied Sciences and Technology, 432-439. DOI: https://doi.org/10.59628/jast.v2i5.1274
H. O. Al-Nadary, Shukri kaid, Abdu A. Alkelly, Hassan T. Al-Ahsab, M. S. Qusaila . “Influence of astigmatic aberration on partially coherent Gaussian-Schell vortex beam focused by lensacon.” Sana'a University Journal of Applied Sciences and Technology, 2024, pp. 432-439. https://doi.org/10.59628/jast.v2i5.1274. Accessed 30 Oct. 2026.
H. O. Al-Nadary, Shukri kaid, Abdu A. Alkelly, Hassan T. Al-Ahsab, M. S. Qusaila . 2024. “Influence of astigmatic aberration on partially coherent Gaussian-Schell vortex beam focused by lensacon.” Sana'a University Journal of Applied Sciences and Technology : 432-439. DOI: https://doi.org/10.59628/jast.v2i5.1274
H. O. Al-Nadary, Shukri kaid, Abdu A. Alkelly, Hassan T. Al-Ahsab, M. S. Qusaila (2024) ‘Influence of astigmatic aberration on partially coherent Gaussian-Schell vortex beam focused by lensacon’, Sana'a University Journal of Applied Sciences and Technology, pp. 432-439. doi: 10.59628/jast.v2i5.1274
@article{jast2024_art1274,
author = {H. O. Al-Nadary, Shukri kaid, Abdu A. Alkelly, Hassan T. Al-Ahsab, M. S. Qusaila },
title = {Influence of astigmatic aberration on partially coherent Gaussian-Schell vortex beam focused by lensacon},
journal = {Sana'a University Journal of Applied Sciences and Technology}, year = {2024}, month = {October}, pages = {432-439}, doi = {10.59628/jast.v2i5.1274},
url = {https://doi.org/10.59628/jast.v2i5.1274},}
Influence of astigmatic aberration on partially coherent Gaussian-Schell vortex beam focused by lensacon
The study focused on examining the characteristics of partially coherent Lorentz-Gauss vortex beams in a medium featuring a gradient refractive index. The study employed the ABCD matrix, deriving analytical expressions for the cross-spectral density function based on the extended Huygens-Fresnel principle and the relationship between the Hermitian Gaussian function and Lorentz distribution. The findings revealed that the topological charge, coherence length, and gradient refractive index coefficient are pivotal factors influencing the beam’s behaviour in the medium. An increase in topological charge led to an expansion of the dark spot in intensity, while the gradient refractive index plays a crucial role in altering the size and shape of the intensity periodically in the medium and does not affect the dark spot in the middle of the beam. The findings from this study hold potential for applications in remote sensing and optical communications, making them valuable for further research endeavors.
Mohammed S. Qusailah, Abdu A. Alkelly, Wafa’a A. Al-Bahry (2024). Propagation intensity and phase distribution of a Partially Coherent Lorentz–Gauss Vortex Beam in a Gradient-Index Medium. Sana'a University Journal of Applied Sciences and Technology, 124-133. DOI: https://doi.org/10.59628/jast.v2i2.897
Mohammed S. Qusailah, Abdu A. Alkelly, Wafa’a A. Al-Bahry . “Propagation intensity and phase distribution of a Partially Coherent Lorentz–Gauss Vortex Beam in a Gradient-Index Medium.” Sana'a University Journal of Applied Sciences and Technology, 2024, pp. 124-133. https://doi.org/10.59628/jast.v2i2.897. Accessed 30 Oct. 2026.
Mohammed S. Qusailah, Abdu A. Alkelly, Wafa’a A. Al-Bahry . 2024. “Propagation intensity and phase distribution of a Partially Coherent Lorentz–Gauss Vortex Beam in a Gradient-Index Medium.” Sana'a University Journal of Applied Sciences and Technology : 124-133. DOI: https://doi.org/10.59628/jast.v2i2.897
Mohammed S. Qusailah, Abdu A. Alkelly, Wafa’a A. Al-Bahry (2024) ‘Propagation intensity and phase distribution of a Partially Coherent Lorentz–Gauss Vortex Beam in a Gradient-Index Medium’, Sana'a University Journal of Applied Sciences and Technology, pp. 124-133. doi: 10.59628/jast.v2i2.897
@article{jast2024_art897,
author = {Mohammed S. Qusailah, Abdu A. Alkelly, Wafa’a A. Al-Bahry },
title = {Propagation intensity and phase distribution of a Partially Coherent Lorentz–Gauss Vortex Beam in a Gradient-Index Medium},
journal = {Sana'a University Journal of Applied Sciences and Technology}, year = {2024}, month = {May}, pages = {124-133}, doi = {10.59628/jast.v2i2.897},
url = {https://doi.org/10.59628/jast.v2i2.897},}
Propagation intensity and phase distribution of a Partially Coherent Lorentz–Gauss Vortex Beam in a Gradient-Index Medium
This study investigates the propagation behavior of a class of general circular light beams (CiBs), known as Whittaker–Gaussian beams (WGBs), as they traverse oceanic turbulence by employing the Rytov approximation and diffraction integral formalism. Based on the derived analytical expression, numerical simulations were per- formed to evaluate the impact of oceanic turbulence on the axial intensity distribution of these circular beams. The results indicate that the beam intensity profile is significantly influenced by variations in its initial parameters, namely, the beam waist and wavelength, as well as by key oceanic turbulence parameters, including the rate of mean-square temperature dissipation, balance between temperature and salinity fluctuations, and rate of turbulent kinetic energy dissipation per unit mass. These findings offer deeper insights that can support the development and optimization of optical systems used in underwater communication, remote sensing, and imaging applications.
N. Nossir, L. Dalil-Essakali, A. Belafhal (2025). The Propagation properties of the average intensity evolution of Whittaker–Gaussian beams in oceanic turbulence. Sana'a University Journal of Applied Sciences and Technology, 1419-1428. DOI: https://doi.org/10.59628/jast.v3i6.2334
N. Nossir, L. Dalil-Essakali, A. Belafhal . “The Propagation properties of the average intensity evolution of Whittaker–Gaussian beams in oceanic turbulence.” Sana'a University Journal of Applied Sciences and Technology, 2025, pp. 1419-1428. https://doi.org/10.59628/jast.v3i6.2334. Accessed 30 Oct. 2026.
N. Nossir, L. Dalil-Essakali, A. Belafhal . 2025. “The Propagation properties of the average intensity evolution of Whittaker–Gaussian beams in oceanic turbulence.” Sana'a University Journal of Applied Sciences and Technology : 1419-1428. DOI: https://doi.org/10.59628/jast.v3i6.2334
N. Nossir, L. Dalil-Essakali, A. Belafhal (2025) ‘The Propagation properties of the average intensity evolution of Whittaker–Gaussian beams in oceanic turbulence’, Sana'a University Journal of Applied Sciences and Technology, pp. 1419-1428. doi: 10.59628/jast.v3i6.2334
@article{jast2025_art2334,
author = {N. Nossir, L. Dalil-Essakali, A. Belafhal },
title = {The Propagation properties of the average intensity evolution of Whittaker–Gaussian beams in oceanic turbulence},
journal = {Sana'a University Journal of Applied Sciences and Technology}, year = {2025}, month = {December}, pages = {1419-1428}, doi = {10.59628/jast.v3i6.2334},
url = {https://doi.org/10.59628/jast.v3i6.2334},}
The Propagation properties of the average intensity evolution of Whittaker–Gaussian beams in oceanic turbulence
Based on the derived analytical formulae for the optical intensity and effective beam width of a partially coherent rectangular multi-Gaussian Schell-model (RMGSM) vortex beam, we analyzed the evolution of the effective beam width of a partially coherent RMGSM vortex beam propagating in an anisotropic turbulent plasma using numerical examples. The numerical results demonstrated that the effective beam widths in the x and y directions were similar. In studies on the influences of the source parameters, one can see that an RMGSM vortex beam with a larger topological charge and beam waist or a smaller correlation coefficient σ evolves into a beam with a larger effective beam width. However, the influence of beam order was not evident. In addition, numerical examples proved that the effective beam width increases with increasing propagation distance and refractive index fluctuation variance or decreasing anisotropy parameter , outer scale , and inner scale . This study's results will be beneficial for applications in free-space optical communications.
H. O. AL-Nadary, Abdu Ahmed Alkelly, M. A. H. Khaled, Labiba F. Hassan (2023). The effective beam width of a partially coherent rectangular mul-ti-Gaussian Schell-model vortex beam propagating in a turbulent plasma . Sana'a University Journal of Applied Sciences and Technology. DOI: https://doi.org/10.59628/jast.v1i3.494
H. O. AL-Nadary, Abdu Ahmed Alkelly, M. A. H. Khaled, Labiba F. Hassan . “The effective beam width of a partially coherent rectangular mul-ti-Gaussian Schell-model vortex beam propagating in a turbulent plasma .” Sana'a University Journal of Applied Sciences and Technology, 2023, https://doi.org/10.59628/jast.v1i3.494. Accessed 30 Oct. 2026.
H. O. AL-Nadary, Abdu Ahmed Alkelly, M. A. H. Khaled, Labiba F. Hassan . 2023. “The effective beam width of a partially coherent rectangular mul-ti-Gaussian Schell-model vortex beam propagating in a turbulent plasma .” Sana'a University Journal of Applied Sciences and Technology DOI: https://doi.org/10.59628/jast.v1i3.494
H. O. AL-Nadary, Abdu Ahmed Alkelly, M. A. H. Khaled, Labiba F. Hassan (2023) ‘The effective beam width of a partially coherent rectangular mul-ti-Gaussian Schell-model vortex beam propagating in a turbulent plasma ’, Sana'a University Journal of Applied Sciences and Technology. doi: 10.59628/jast.v1i3.494
@article{jast2023_art494,
author = {H. O. AL-Nadary, Abdu Ahmed Alkelly, M. A. H. Khaled, Labiba F. Hassan },
title = {The effective beam width of a partially coherent rectangular mul-ti-Gaussian Schell-model vortex beam propagating in a turbulent plasma },
journal = {Sana'a University Journal of Applied Sciences and Technology}, year = {2023}, month = {September}, doi = {10.59628/jast.v1i3.494},
url = {https://doi.org/10.59628/jast.v1i3.494},}
The effective beam width of a partially coherent rectangular mul-ti-Gaussian Schell-model vortex beam propagating in a turbulent plasma
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Sana'a University Journal
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A peer-reviewed, open-access journal publishing high-quality research in applied sciences, engineering, and technology since 2023.