Experimental research on phase diversity method for correcting vortex beam distortion wavefront

Ke, Xizheng; Cui, NaMei

doi:10.1007/s00340-020-7413-7

Cited by 10 publications

(2 citation statements)

References 26 publications

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“…Sudden changes in the time and space references of physical quantities, such as the temperature and pressure of atmospheric turbulence, are the main reasons behind the random fluctuations of the atmospheric refractive index. Therefore, vortex beam propagation in the atmosphere is also subject to the absorption and scattering effects of atmospheric molecules, which produce wavefront distortion [10], beam spreading [11], light intensity scintillation [12], singularities drift [13] and other phenomena, namely, turbulence effects [14][15][16]. However, with a limited receiving aperture, a portion of the topological charge drifts out of the receiving aperture as the beam broadens, thus degrading the beam quality [17,18].…”

Section: Introductionmentioning

confidence: 99%

Analysis on the characteristics of vortex beam in field turbulence

Xie¹,

Ke²,

Dong³

et al. 2022

Laser Phys.

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In this study, we have investigated the propagation characteristics of single-mode Laguerre–Gaussian (LG) beams under field atmospheric turbulence conditions. We constructed a 1200 meter experimental platform for representing vortex beams in the field. Accordingly, we analyzed the spot changes in an LG beam after transmitted through atmospheric turbulence. Based on the principle of Fresnel diffraction and the random phase screen method, we studied the evolution and spiral spectrum distribution of low-order LG beams transmitted by atmospheric turbulence by numerical simulation. Moreover, we carried out an experimental study regarding the LG beam propagation characteristics mainly based on field experiments. The experimental results indicate that after near-surface turbulent propagation, the LG beam gradually spreads, degree of phase singularity drift becomes larger, and spot size of the Gaussian beam grows faster than that of the LG beam with greater propagation distances. Finally, we concluded that LG beams are not significantly affected by turbulence. It also lays a foundation for the experimental study of vortex beam detection and wavefront correction at the receiving end in multiplexing communication.

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Section: Introductionmentioning

confidence: 99%

Analysis on the characteristics of vortex beam in field turbulence

Xie¹,

Ke²,

Dong³

et al. 2022

Laser Phys.

Self Cite

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“…For FSO systems, whether it is a fading compensation algorithm or a calibration algorithm, the complexity of the algorithm seriously affects the performance of the system. Therefore, people are constantly optimizing the algorithm in the system to increase the computing speed [15][16][17]. In this work, we use circuitous phased encoding for accurate alignment to reduce the complexity of image and hologram conversion, which further increases the calculation speed and reduces handling delays.…”

Section: Introductionmentioning

confidence: 99%

FSO Receiver With Adaptive Alignment Based on Pure Phased Holographic Imaging

Wang

Zhang

2021

Front. Phys.

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This paper proposes a free space optical communication (FSO) receivier system with adaptive alignment based on pure phase holographic imaging. During the frame header transmission period, the optical phased array in this system performs specific holographic imaging on the receiving plane, which assist the system to undergo beam alignment. The system model has been built in this work, along with the receiving signal expression. Based on the physical model, we propose an algorithm for positioning calibration and the circuitous phased encoding for improvement of imaging quality and algorithm complexity.

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Orbital Angular Momentum Beam Techniques

2024

Handbook of Optical Wireless Communication

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Experimental research on phase diversity method for correcting vortex beam distortion wavefront

Cited by 10 publications

References 26 publications

Analysis on the characteristics of vortex beam in field turbulence

Analysis on the characteristics of vortex beam in field turbulence

FSO Receiver With Adaptive Alignment Based on Pure Phased Holographic Imaging

Orbital Angular Momentum Beam Techniques

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