Effect of atmospheric turbulence on the BER performance of an optical CDMA FSO link with SIK receiver
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DOI: 10.1016/j.ijleo.2018.08.008
Abstract: Abstract An analytical approach is presented to evaluate the effect of atmospheric turbulence on the bit error rate (BER) performance of an optical code division multiple access (OCDMA) free space optical (FSO) link using optical… read more here.
Keywords: effect; sik receiver; ber; atmospheric turbulence ... See more keywords
Numerical simulation for echo characteristics of laser beams reflected by retro-reflectors in atmospheric turbulence
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DOI: 10.1016/j.ijleo.2018.10.200
Abstract: Abstract In this study, a split-step Fourier method (FFSM) was extended in the simulation of a double-passage laser propagation in atmospheric turbulence. The characteristics of the coherence length and intensity scintillation for the plane wave,… read more here.
Keywords: echo characteristics; numerical simulation; atmospheric turbulence; simulation echo ... See more keywords
Study on the influence of atmospheric turbulence on the along axial beam
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DOI: 10.1016/j.ijleo.2019.04.095
Abstract: Abstract In order to obtain clearer interference pattern of interferometric radar and obtain more accurate detection target, this paper studies the influence of atmospheric turbulence on axial transmission beam. The response of random wave number… read more here.
Keywords: turbulence; influence; fluctuation; atmospheric turbulence ... See more keywords
Echo characteristics of laser beams reflected from rough targets with a finite size in atmospheric turbulence
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DOI: 10.1016/j.ijleo.2020.165861
Abstract: Abstract Based on the extended Huygens-Fresnel principle, echo characteristics of the plane and spherical waves reflected from a rough target with a finite size in atmospheric turbulence were studied. The expressions of the intensity variance,… read more here.
Keywords: turbulence; target; atmospheric turbulence; reflected rough ... See more keywords
Atmospheric turbulence compensation in orbital angular momentum communications: Advances and perspectives
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DOI: 10.1016/j.optcom.2017.09.034
Abstract: Abstract Orbital angular momentum (OAM)-carrying beams have recently generated considerable interest due to their potential use in communication systems to increase transmission capacity and spectral efficiency. For OAM-based free-space optical (FSO) links, a critical challenge… read more here.
Keywords: turbulence compensation; angular momentum; turbulence; atmospheric turbulence ... See more keywords
Spectrum sensing for free space optical communications in strong atmospheric turbulence channel
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DOI: 10.1016/j.optcom.2019.04.009
Abstract: Abstract One of the primary challenges in multi-user optical wireless communications (OWC) is to periodically sense the optical frequency spectrum at the receiver to detect whether the channel is occupied by other transceiver pairs in… read more here.
Keywords: turbulence channel; spectrum sensing; strong atmospheric; atmospheric turbulence ... See more keywords
Investigations on the turbulence resistant characteristics of Custom Designed Beams embedded with multiple phase singularities
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DOI: 10.1016/j.optlastec.2019.105851
Abstract: Abstract Investigation on the propagation of an optical beam carrying phase singularities through atmospheric turbulence attracts researcher involved in the laser projection applications. In this paper, a group of Custom Designed Beams (CDB) are designed… read more here.
Keywords: phase; custom designed; turbulence; atmospheric turbulence ... See more keywords
Influence of atmospheric turbulence on coherent source in a horizontal long-distance laser link
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DOI: 10.1016/j.optlastec.2019.105877
Abstract: Abstract In coherent optical communication, the application of linearly polarized light can greatly improve communication sensitivity and communication capacity. However, when a laser transmits in an inferior atmospheric layer, the polarization character is influenced by… read more here.
Keywords: influence atmospheric; communication; turbulence coherent; turbulence ... See more keywords
Non-Kolmogorov atmospheric turbulence and orbital angular momentum of entangled states for optical communication
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DOI: 10.1016/j.rinp.2019.102676
Abstract: Abstract We extend the theory of detection probabilities of single-photon communication in turbulent atmosphere to the entangled case and derive analytical expressions for detection probabilities. We show that the rotational field correlation in the entangled… read more here.
Keywords: detection; kolmogorov atmospheric; non kolmogorov; angular momentum ... See more keywords
Settling and clustering of snow particles in atmospheric turbulence
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DOI: 10.1017/jfm.2020.1153
Abstract: Abstract The effect of turbulence on snow precipitation is not incorporated into present weather forecasting models. Here we show evidence that turbulence is in fact a key influence on both fall speed and spatial distribution… read more here.
Keywords: snow particles; velocity; turbulence; atmospheric turbulence ... See more keywords
Atmospheric Turbulence May Promote Cloud Droplet Formation
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DOI: 10.1029/2021eo155989
Abstract: Turbulence causes local variations in relative humidity, which can push particles past a critical saturation threshold for droplet nucleation. read more here.
Keywords: may promote; promote cloud; turbulence; cloud droplet ... See more keywords