Application of nondiffracting beams to wireless optical communications

Kollárova, Věra; Medřík, T.; Čelechovský, Radek; Bouchal, Zdeněk; Wilfert, Otakar; Kolka, Zdenek

doi:10.1117/12.737361

Cited by 23 publications

(7 citation statements)

References 18 publications

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“…To mitigate turbulence-induced diffraction, it has been suggested to use BG-beams. 7 However, it was found that BG-beams propagating through turbulence indeed suffer from diffraction. [8][9][10][11][12][13] This was attributed to the fact that the beam is emersed in the turbulent fluid thus preventing the beam from self-healing.…”

Section: Introductionmentioning

confidence: 99%

Scintillation and bit error rate analysis of zero-order Bessel–Gauss beams in atmospheric turbulence based on the extended Rytov theory

Shishter,

Ali,

Young

2023

Opt. Eng.

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Free space diffraction causes the spreading of the received energy at the receiver and thus reduces the signal-to-noise ratio. Bessel-Gauss (BG) beams are considered physically realizable beams, which are robust to free space diffraction over finite propagation distances. Non-diffraction beams have proved useful in many applications, such as optical wireless communications (OWC) and non-linear optics. However, in turbulence BG-beams do suffer from turbulence-induced diffraction. The extended Huygens-Fresnel principle is the main tool of analysis under the effect of strong turbulence. However, the extended Rytov theory (ERT) method provides expressions for the small-and large-scale turbulence-induced signal fluctuations and hence is particularly suitable for statistical channel modeling. In this work, application of the ERT to BG-beams propagating through turbulence is carried out. Closed-form expressions for the induced on-axis small-and large-scale log-irradiance variances are derived. The resultant index of scintillation is analyzed. Then, the error performance of OWC is investigated for BG-beams combined with intensity modulation, M-ary phase shift keying, polarization shift keying, and single-inputmultiple-output systems. Significant performance gains are reported compared to Gaussian beams.

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Section: Introductionmentioning

confidence: 99%

Scintillation and bit error rate analysis of zero-order Bessel–Gauss beams in atmospheric turbulence based on the extended Rytov theory

Shishter,

Ali,

Young

2023

Opt. Eng.

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“…Although the ideal Bessel beams with infinite transverse extent and energy cannot be produced experimentally, the quasi-Bessel beams with finite size approximation can be generated by use of holographic elements [2], an axicon [3,4,5], a Spatial Light Modulator (SLM) [6], a conical mirror [7] or a Digital Micro Mirror device (DMD) [8]. Because of their special properties, such as non-diffraction [1], selfreconstruction [9] and superluminality [10], Bessel beams have prospective applications in the fields of optical manipulation [11], the design of optics devices, imaging [12] and communication [13]. Most noteworthy, investigation results show that beams with orbital angular momentum (OAM), which are also called vortex beams, have great potential in improving the communication efficiency [14][15][16], hence the high-order Bessel beams [17][18][19], which belong to a class of OAM beams, are worthy of more attention.…”

Section: Introductionmentioning

confidence: 99%

Intensity, phase, and polarization of a vector Bessel vortex beam through multilayered isotropic media

Honary

Wang

et al. 2018

Appl. Opt.

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This paper investigates the characteristics of reflected and transmitted fields of a vector Bessel vortex beam through multilayered isotropic media on the basis of the vector angular spectrum expansion and presents the effects of media on intensity, phase, and polarization. The method is verified by studying the reflection and transmission on a single interface at vertical incidence. For both paraxial and nonparaxial incident beam cases, numerical simulations of the field components and the time-averaged Poynting vector power density of the reflected and transmitted beams for the three-layered media are presented and discussed in detail. It is shown that as the incident angle increases, the magnitude distribution of the reflected beams illustrates significant distortions and no longer represents similar patterns to that of the incident beam, whereas the magnitude distribution of the transmitted beams can maintain similar profiles to the incident beam, apart from the notable distortion of the central ring. For the same incident angle, the effects of media on the magnitude distribution for the nonparaxial case are more evident than those for the paraxial case. The results of phase distribution and polarization of the reflected and transmitted fields show that as the incident angle increases, the distortion of the phase distribution and polarization for the reflected fields are more significant and the topological charge cannot be preserved.

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“…Ideal nondiffracting beams [1], exact solutions of the wellknown Helmholtz equation, behave with a special nondiffracting property: they remain unchanged in free-space propagation. The special properties of nondiffracting beams, such as long focal length and self-healing [2,3], have stimulated a lot of practical applications: optical interconnections [3,4], laser machining [5,6], collimation and measurement [7], optical manipulation [8][9][10], etc. However, the characteristics possessing an infinite extent and energy make ideal nondiffracting beams physically unrealizable.…”

Section: Introductionmentioning

confidence: 99%

Numerical study on the selective excitation of Helmholtz–Gauss beams in end-pumped solid-state digital lasers with the control of the laser gain transverse position provided by off-axis end pumping

Tsai

Chu²

2018

Laser Phys.

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This study proposes a complete and unified method for selective excitation of any specified nearly nondiffracting Helmholtz-Gauss (HzG) beam in end-pumped solid-state digital lasers. Four types of the HzG beams: cosine-Gauss beams, Bessel-Gauss beams, Mathieu-Gauss beams, and, in particular, parabolic-Gauss beams are successfully demonstrated to be generated with the proposed methods. To the best of the authors' knowledge, parabolic-Gauss beams have not yet been directly generated from any kind of laser system. The numerical results of this study show that one can successfully achieve any lasing HzG beams directly from the solid-state digital lasers with only added control of the laser gain transverse position provided by off-axis end pumping. This study also presents a practical digital laser set-up for easily manipulating off-axis pumping in order to achieve the control of the laser gain transverse gain position in digital lasers. The reported results in this study provide advancement of digital lasers in dynamically generating nondiffracting beams. The control of the digital laser cavity gain position creates the possibility of achieving real-time selection of more laser modes in digital lasers, and it is worth further investigation in the future.

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Application of nondiffracting beams to wireless optical communications

Cited by 23 publications

References 18 publications

Scintillation and bit error rate analysis of zero-order Bessel–Gauss beams in atmospheric turbulence based on the extended Rytov theory

Scintillation and bit error rate analysis of zero-order Bessel–Gauss beams in atmospheric turbulence based on the extended Rytov theory

Intensity, phase, and polarization of a vector Bessel vortex beam through multilayered isotropic media

Numerical study on the selective excitation of Helmholtz–Gauss beams in end-pumped solid-state digital lasers with the control of the laser gain transverse position provided by off-axis end pumping

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