Generating a Bessel-Gaussian beam for the application in optical engineering

Chu, Xiuxiang; Sun, Quan; Wang, Jing; Lü, Peng; Xie, Weiping; Xu, Xiaojun

doi:10.1038/srep18665

Cited by 73 publications

(34 citation statements)

References 34 publications

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“…However, a typical high directional antenna fails to reduce the energy loss incurred by beam diffraction. As a result, the Gaussian beam as well as the non-diffracted electromagnetic waves such as Bessel beams and Bessel-Gaussian beams [136] can be exploited for the sake of further alleviating the adverse effect of beam diffraction. Relying on their non-diffracting nature, the Bessel-Gaussian beams are capable of efficiently reducing the energy dissipation and hence improve the WET efficiency over wireless channels.…”

Section: B Wet Over Rf Channelsmentioning

confidence: 99%

Integrated Data and Energy Communication Network: A Comprehensive Survey

Yang

Wen

et al. 2018

IEEE Commun. Surv. Tutorials

135

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In order to satisfy the power thirsty of communication devices in the imminent 5G era, wireless charging techniques have attracted much attention both from the academic and industrial communities. Although the inductive coupling and magnetic resonance based charging techniques are indeed capable of supplying energy in a wireless manner, they tend to restrict the freedom of movement. By contrast, RF signals are capable of supplying energy over distances, which are gradually inclining closer to our ultimate goal -charging anytime and anywhere. Furthermore, transmitters capable of emitting RF signals have been widely deployed, such as TV towers, cellular base stations and Wi-Fi access points. This communication infrastructure may indeed be employed also for wireless energy transfer (WET). Therefore, no extra investment in dedicated WET infrastructure is required. However, allowing RF signal based WET may impair the wireless information transfer (WIT) operating in the same spectrum. Hence, it is crucial to coordinate and balance WET and WIT for simultaneous wireless information and power transfer (SWIPT), which evolves to Integrated Data and Energy communication Networks (IDENs). To this end, a ubiquitous IDEN architecture is introduced by summarising its natural heterogeneity and by synthesising a diverse range of integrated WET and WIT scenarios. Then the inherent relationship between WET and WIT is revealed from an information theoretical perspective, which is followed by the critical appraisal of the hardware enabling techniques extracting energy from RF signals. Furthermore, the transceiver design, resource allocation and user scheduling as well as networking aspects are elaborated on. In a nutshell, this treatise can be used as a handbook for researchers and engineers, who are interested in enriching their knowledge base of IDENs and in putting this vision into practice.Index Terms-RF signals, wireless energy transfer (WET), wireless information transfer (WIT), simultaneous wireless information and power transfer (SWIPT), wireless powered communication networks (WPCNs), integrated data and energy communication networks (IDENs).an increasing research interest from both the electronic and communication engineering communities. C. Near-field Wireless Energy TransferAt the time of writing, resonant inductive coupling [35] and magnetic resonance coupling [36] emerge as flexible wireless charging options for electronic devices in the nearfield. Resonant inductive coupling based wireless charging relies on the magnetic coupling that delivers electrical energy between two coils tuned to resonate at the same frequency. This technique has already been commercialised for small electronic appliances [37], such as mobile phones, electric toothbrushes and smart watches etc. However, the coupling coils only support near-field wireless power transfer over a distance spanning from a few millimetres to a few centimetres [38], while achieving a power transfer efficiency as high as 56.7%, when operating at a frequency of 508 kHz [...

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Section: B Wet Over Rf Channelsmentioning

confidence: 99%

Integrated Data and Energy Communication Network: A Comprehensive Survey

Yang

Wen

et al. 2018

IEEE Commun. Surv. Tutorials

135

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“…© 2018 Optical Society of America under the terms of the OSA Open Access Publishing Agreement Light conveys electric and magnetic fields that are polarized perpendicularly with respect to the propagation axis due to its transversal nature. It has been decades since such a discreet definition of light was experimentally overturned, as a result of the realization of radially polarized Bessel-Gauss and Laguerre-Gaussian beams [1][2][3][4]. When radially polarized beams are tightly focused, the longitudinal components will be constructively added together and provide finite field amplitude at the focus, while the transversal components cancel out.…”

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confidence: 99%

Multi-MV/cm longitudinally polarized terahertz pulses from laser–thin foil interaction

Woldegeorgis¹,

Kurihara²,

Almassarani³

et al. 2018

Optica

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Longitudinally polarized terahertz radiation offers access to the elementary excitations and particles that cannot be addressed by transverse waves. While transverse electric fields exceeding 1 MV/cm are widely utilized for nonlinear terahertz spectroscopy, longitudinally polarized terahertz waves at this field strength are yet to be realized. In this paper, we experimentally demonstrate that by focusing radially polarized terahertz fields generated from laser-thin metallic foil interaction, longitudinally polarized terahertz with record-breaking field strength above 1.5 MV/cm can be obtained. Furthermore, we also traced the evolution of the geometric phase of the longitudinal component as it propagates through focus. A novel scheme based on noncollinear electro-optic detection has been utilized to unambiguously measure the polarization states. Our result will scale up the nonlinear spectroscopy of solid materials and particle acceleration experiments where on-axis polarization plays a crucial role.

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“…In a previous study, multistaircase SPPs were used to generate vortex phases and provided a reference for analyzing intensity profiles. 19 In this study, the rule of the error due to the multistaircase is valued by the error function E Q -T A R G E T ; t e m p : i n t r a l i n k -; e 0 1 7 ; 3 2 6 ; 4 9 4…”

Section: Solution Of the Finite Hypergeometric Series Summation Fraunmentioning

confidence: 99%

Finite hypergeometric series summation-based Fraunhofer diffraction analysis for optical vortices generated by spiral phase plates

et al. 2019

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Multistaircase spiral phase plates (SPPs) are more commonly used to generate an optical vortex, as compared to ideal continuous surface SPPs. However, due to the complexities and difficulties involved in the manufacturing of the multistaircase SPPs, the number of the staircases M should not be high and should be sufficient to guarantee a similarity between the M staircase situation (considering an intrinsic topological charge l) and the ideal situation. Therefore, a Fraunhofer diffraction analysis model is proposed to quantitatively and quantificationally solve the diffraction field of the vortex generated by multistaircase SPPs. A finite hypergeometric series summation is applied to solve the diffraction fields of the vortices with different parameters, under the conditions of uniform and Gaussian incident beams. The simulation results show that the summation of the first certain terms of the Fourier expansions can appropriately approximate the diffraction field, and M is positively related with l to approach the ideal situations. Thus, the proposed model can provide a reference for designing and setting the parameters of multistaircase SPPs.

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Generating a Bessel-Gaussian beam for the application in optical engineering

Cited by 73 publications

References 34 publications

Integrated Data and Energy Communication Network: A Comprehensive Survey

Integrated Data and Energy Communication Network: A Comprehensive Survey

Multi-MV/cm longitudinally polarized terahertz pulses from laser–thin foil interaction

Finite hypergeometric series summation-based Fraunhofer diffraction analysis for optical vortices generated by spiral phase plates

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