Propagation properties of electromagnetic rectangular multi-Gaussian Schell-model beams in oceanic turbulence

Chen, Xudong; Zhao, Daomu

doi:10.1016/j.optcom.2016.03.082

Cited by 18 publications

(5 citation statements)

References 20 publications

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“…Notably, ( 12) is independent regarding the parameter, N or M, as expected in [22,23], which tighter than that of the classical EGSM source in [39] for N (or M) = 1.…”

Section: Theoretical Model Of the Twisted Emgsmp Sourcesmentioning

confidence: 63%

Twisted Electromagnetic Multi-Gaussian Schell-Model Pulsed Source and Its Propagation

Gao

2021

IEEE Photonics J.

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Here, a novel family of random electromagnetic sources (twisted electromagnetic multi-Gaussian Schell-model pulsed beams) exhibiting transverse orbital angular momentum is proposed. The physically realizable conditions for these sources are established, and the analytical formulas of the cross-spectral density matrix elements of the beam propagating through an ABCD optical system are derived within the framework of the extended Collins formula. The behaviors of the spectral density, and the spectral degree of coherence of the beam during transmission are investigated numerically. This work enriches the classical theory of stochastic electromagnetic beams propagation, and may benefit applications requiring a specified degree of beam coherence with transverse orbital angular momentum. Index Terms-multi-Gaussian function, optical propagation, optical pulse, transverse orbital angular momentum. I. INTRODUCTION OR nearly 30 years, vortex beams exhibiting orbital angular momentum (OAM) have attracted enormous attention owing to their various potential applications in free-space optical communications (FSOC), optical tweezers, astronomy [1-5], etc. In a 1993 paper, Simon and Mukunda introduced the twisted Gaussian Shell-model (GSM) beam [6] exhibiting OAM. This phase, which can only exist in the partially coherent field, can twist the beam around its axis during propagation [6, 7]. Ever since, twisted partially coherent field has generated significant interest. For example, Borghi et al. presented a twisted Schell-model beam exhibiting axial symmetry [8]. Mei and Korotkova constructed two different random sources bearing the twisted phase via the modal representation technique [9]. Gori and Santarsiero presented a mathematical method for generating genuine twisted sources [10]. Moreover, unique twisted partially coherent sources, such as twisted electromagnetic beams with structured correlations [11], twisted Laguerre-GSM beams [12], twisted GSM array beams

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“…Notably, ( 12) is independent regarding the parameter, N or M, as expected in [22,23], which tighter than that of the classical EGSM source in [39] for N (or M) = 1.…”

Section: Theoretical Model Of the Twisted Emgsmp Sourcesmentioning

confidence: 63%

Twisted Electromagnetic Multi-Gaussian Schell-Model Pulsed Source and Its Propagation

Gao

2021

IEEE Photonics J.

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“…When a PCOADVB propagates along the z-axis, recalling the generalized Huygens-Fresnel integral, the expression of a PCOADVB in oceanic turbulence is given as [16][17][18][19][20][21][22][23][24][25][26]:…”

Section: Propagation Csd Of a Pcoadvb In Oceanic Turbulencementioning

confidence: 99%

“…From previous work [15], one finds that partially coherent beams (PCBs) can reduce the negative effects of atmospheric turbulence. So far, the properties of the PCBs in oceanic turbulence have been discussed [16][17][18][19][20][21]. Wu et al derived the expressions of a Gaussian-Schell model (GSM) beam in oceanic turbulence and found that the beam wander can be affected by the source parameters and the ocean [16].…”

Section: Introductionmentioning

confidence: 99%

“…Lu and Zhao derived the expressions of a cusped random beam in oceanic turbulence, analyzed the propagation properties (intensity and coherence), and found that the intensity pattern can be destroyed by strong turbulence [17]. Chen and Zhao proposed an electromagnetic rectangular multi-GSM beam, studied the properties of this rectangular multi-GSM beam in oceanic turbulence, and found that the rectangular profiles became less flat as the distance increased [18]. Zhou et al derived the analytical equations of a multi-sinc correlation beam in an anisotropic turbulent ocean and investigated the evolutions of the lattice intensity profile on propagation [19].…”

Section: Introductionmentioning

confidence: 99%

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Partially Coherent Off-Axis Double Vortex Beam and Its Properties in Oceanic Turbulence

Chen,

Wang,

Yin

et al. 2023

Photonics

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A partially coherent off-axis double vortex beam (PCOADVB) composed of two off-axis vortices is theoretically presented. The analytical equations of a PCOADVB in oceanic turbulence are presented, and the intensity profiles and the number of coherence vortices of the PCOADVBs are investigated based on the derived expressions. The numerical results show that the intensity profiles of PCOADVBs are determined by the initial topological charges M1 and M2 and the positions of the off-axis vortices (x1d,y1d) and (x2d,y2d). The intensity profiles of PCOADVBs will lose the off-axis ring intensity profile and acquire a Gaussian-like profile as z increases, and stronger oceanic turbulence and a smaller σ can help the PCOADVB evolve into a spot with a Gaussian-like profile faster on propagation. The number of coherence vortices of a PCOADVB in oceanic turbulence will increase on propagation. The PCOADVB may have potential applications in underwater laser sensing and wireless communications.

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“…10,11 Multiple approaches were implemented for improving the wireless communication range consisting of MIMO 12,13 and OFDM. [12][13][14] Along with that, individual beams like the spectral degree of coherence, 15,16 partially coherent, 17 and nondiffracted 18 beams will improve the underwater optical communication's distance. However, underwater networks will face few significant defects like high bit error rates, multipath fading, and severely restricted available bandwidth that requires extensive researches for acceptance.…”

mentioning

confidence: 99%

Enhancing the spectral efficiency and energy efficiency of underwater channel communication by optimal cooperative spectrum sensing using hybrid optimization

Umamaheshwararao

Kumar

Madhu

2020

Int J Communication

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Summary Underwater wireless sensor networks (UWSNs) contain quite a lot of components such as vehicles and sensors that are deployed in a specific acoustic area to perform collaborative monitoring and data collection errands. These networks are adopted interactively between diverse nodes and ground‐based stations. Currently, UWSNs face problems and challenges that pertain to limited bandwidth, media access control, high propagation delay, 3D topology, spectrum sensing, resource utilization, routing, and power constraints. This proposal deals with the intelligent spectrum sensing in underwater cognitive sonar communication networks (CSCN). Here, the improved performance of spectrum sensing in underwater communication is attained by optimizing the cooperative spectrum sensing and data transmission. The parameters of system like subchannel allocation and transmission power is optimized by a new hybrid meta‐heuristic algorithm by integrating the concepts of deer hunting optimization algorithm (DHOA) and lion algorithm (LA) termed as lion‐enabled DHOA (L‐DHOA). The main intention of optimizing these parameters is to maximize the spectrum efficiency (SE) and energy efficiency (EE) of the underwater channel communication system. From the analysis, with respect to convergence rate, minimum detection probability, and local sensing time, it is proved that the novel hybrid optimization algorithm keeps a great role in making the trade‐off between the SE and EE in underwater channel modeling.

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Propagation properties of electromagnetic rectangular multi-Gaussian Schell-model beams in oceanic turbulence

Cited by 18 publications

References 20 publications

Twisted Electromagnetic Multi-Gaussian Schell-Model Pulsed Source and Its Propagation

Twisted Electromagnetic Multi-Gaussian Schell-Model Pulsed Source and Its Propagation

Partially Coherent Off-Axis Double Vortex Beam and Its Properties in Oceanic Turbulence

Enhancing the spectral efficiency and energy efficiency of underwater channel communication by optimal cooperative spectrum sensing using hybrid optimization

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