Focusing characteristics of Bessel-Gaussian beam passing through Cassegrain antenna system in weak turbulence

Qin, Yi; Yang, Huajun; Jiang, Ping; Caiyang, Weinan; Zhou, Miaofang; Cao, Biao

doi:10.1016/j.rinp.2021.104614

Cited by 6 publications

(1 citation statement)

References 25 publications

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“…Two commonly employed methods to mitigate crosstalk in free-space optical communication include adaptive optics [13,14], and the utilization of anti-diffraction light sources such as Bessel-Gaussian beams [15], Lommel beams [16], Hermite-Gaussian vortex pulsed beams [17], Laguerre-Gaussian beams [18,19]. However, both approaches possess certain disadvantages; the adaptive optics systems are highly intricate while generating anti-diffraction beams requires some complex instruments.…”

Section: Introductionmentioning

confidence: 99%

Modulation effect of focusing mirror on beam propagation through anisotropic turbulence

Yu,

Wang,

Zhou

et al. 2024

Phys. Scr.

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In this study, we modulated the Bessel-Gaussian (BG) beam using a focusing mirror to enhance the performance of wireless optical communication (WOC) while considering the angles between turbulence cells and the transmitted direction when beams propagate through anisotropic atmospheric turbulence along a slant path. Numerical results reveal that when the BG beam is modulated by a focusing mirror with a focusing length of 1 km, the detection probability of orbital angular momentum (OAM) is increased by 9.06% compared with the unmodulated BG beam when the OAM quantum number is 1. Simultaneously, this modulation method effectively reduces the bit error rate and enhances the channel capacity in OAM-based WOC. Furthermore, we observed that the smaller the OAM number, the better the effect of the modulation. Through our analysis, we identified that the most significant distortions in OAM mode propagation occur at the exponential parameter approximately 3.1 in the modified von Karman spectrum. Moreover, we demonstrated that the effects of the anisotropic tilt angle can not be negligible for beams through a slant path. Therefore, the modulation of the focusing mirror, in combination with a well-designed propagation direction that takes appropriate angles into account, can significantly improve the overall quality and quality of optical communication systems.

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Section: Introductionmentioning

confidence: 99%

Modulation effect of focusing mirror on beam propagation through anisotropic turbulence

Yu,

Wang,

Zhou

et al. 2024

Phys. Scr.

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The collimation of the Bessel Gauss beams using a composite optical system consisting of multiple pairs of Cassegrain antennas

Shang

Jiang

Yang

2023

Optik

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Coupling condition analysis of Bessel–Gaussian beam to few mode fibers

et al. 2023

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In this paper, the theoretical model of the coupling efficiency of BG beams to few-mode fibers (FMFs) in the case of perfect alignment, lateral or vertical offsets, and random angular jitter is investigated and compared with that of sew-mode fibers (SMFs). Under the same conditions, FMF obtains a higher coupling efficiency with the BG beam and flatter response characteristics to deviations from ideal conditions compared with SMF. At the same time, the effects of the half-cone angle and topological charge of the BG beam on the coupling efficiency and response characteristics during nonideal conditions are studied. According to the precision of the coupling system, a higher coupling efficiency can be obtained by adjusting the half-cone angle, topological charge, and focal length. That makes them a more practical choice for information transmissions, such as mobile platform communication and the transmission of pedestrian data collected during transportation. The research results could help apply the BG beam and other orbital angular momentum (OAM) beams coupled with FMF.

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Focusing characteristics of Bessel-Gaussian beam passing through Cassegrain antenna system in weak turbulence

Cited by 6 publications

References 25 publications

Modulation effect of focusing mirror on beam propagation through anisotropic turbulence

Modulation effect of focusing mirror on beam propagation through anisotropic turbulence

The collimation of the Bessel Gauss beams using a composite optical system consisting of multiple pairs of Cassegrain antennas

Coupling condition analysis of Bessel–Gaussian beam to few mode fibers

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