Laser physics

Items 5

فيزياء الليزر

A new study on the interaction of structured Laguerre-Bessel-Gaussian beam with a chiral medium

F. Boufalah, L. Dalil-Essakali, A. Belafhal

1187-1194

2025-10-28

DOI: 10.59628/jast.v3i5.2320

Abstract

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.

Keywords

Propagation Right circularly polarized beams Chiral medium Left circularly polarized beams
How to Cite This Article
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 15 Sep. 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},}

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A new study on the interaction of structured Laguerre-Bessel-Gaussian beam with a chiral medium

F. Boufalah belafhal@gmail.com

L. Dalil-Essakali latifadalilessakali@gmail.com

A. Belafhal Corresponding belafhal@gmail.com

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Influence of astigmatic aberration on partially coherent Gaussian-Schell vortex beam focused by lensacon

H. O. Al-Nadary, Shukri kaid, Abdu A. Alkelly, Hassan T. Al-Ahsab, M. S. Qusaila

432-439

2024-10-30

DOI: 10.59628/jast.v2i5.1274

Abstract

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.

Keywords

partially coherent Gaussian Schell model vor- tex dark hollow lensacon astigmatic aberra- tion depth of focus.
How to Cite This Article
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 15 Sep. 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},}

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Influence of astigmatic aberration on partially coherent Gaussian-Schell vortex beam focused by lensacon

Shukri kaid Corresponding shukre.kaid@su.edu.ye

M. S. Qusaila m.qusailah@su.edu.ye

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Propagation intensity and phase distribution of a Partially Coherent Lorentz–Gauss Vortex Beam in a Gradient-Index Medium

Mohammed S. Qusailah, Abdu A. Alkelly, Wafa’a A. Al-Bahry

124-133

2024-05-05

DOI: 10.59628/jast.v2i2.897

Abstract

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.

Keywords

Partially Coherent Lorentz–Gauss Vortex Beam Gradient-Index Medium
How to Cite This Article
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 15 Sep. 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},}

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Propagation intensity and phase distribution of a Partially Coherent Lorentz–Gauss Vortex Beam in a Gradient-Index Medium

Mohammed S. Qusailah m.qusailah@su.edu.ye

Abdu A. Alkelly Corresponding a.alkelly@su.edu.ye

Wafa’a A. Al-Bahry w.albahri@su.edu.ye

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The Propagation properties of the average intensity evolution of Whittaker–Gaussian beams in oceanic turbulence

N. Nossir, L. Dalil-Essakali, A. Belafhal

1419-1428

2025-12-28

DOI: 10.59628/jast.v3i6.2334

Abstract

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.

Keywords

Circular light beams Whittaker–Gaussian beams Oceanic turbulence Rytov approximation theory Diffraction integral formalism Remote sensing
How to Cite This Article
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 15 Sep. 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},}

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The Propagation properties of the average intensity evolution of Whittaker–Gaussian beams in oceanic turbulence

N. Nossir naima.nossir@gmail.com

L. Dalil-Essakali latifadalilessakali@gmail.com

A. Belafhal Corresponding belafhal@gmail.com

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The effective beam width of a partially coherent rectangular mul-ti-Gaussian Schell-model vortex beam propagating in a turbulent plasma

H. O. AL-Nadary, Abdu Ahmed Alkelly, M. A. H. Khaled, Labiba F. Hassan

2023-09-20

DOI: 10.59628/jast.v1i3.494

Abstract

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.

Keywords

Effective beam width Partially coherent Rectangular multi-Gaussian Schell-model Turbulent plasma
How to Cite This Article
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 15 Sep. 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},}

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The effective beam width of a partially coherent rectangular mul-ti-Gaussian Schell-model vortex beam propagating in a turbulent plasma

H. O. AL-Nadary Corresponding qminsanaa@yahoo.com

Abdu Ahmed Alkelly a.alkelly@su.edu.ye

M. A. H. Khaled mahkhaled@hotmail.com

Labiba F. Hassan labibahassan71@gmail.com

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