M^2-factor of coherent and partially coherent dark hollow beams propagating in turbulent atmosphere

Yuan, Yangsheng; Cai, Yangjian; Qu, Jun; Eyyuboğlu, Halil T.; Baykal, Yahya; Korotkova, Olga

doi:10.1364/oe.17.017344

Cited by 133 publications

(59 citation statements)

References 47 publications

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“…It has been reported [39,40] that partially coherent beams are less sensitive to distortions caused by the propagation in random media than their coherent counterparts, making them of interest for free-space laser communications and sensing. Another recently proposed scheme for data transmission employing orbital angular momentum multiplexing use, as in the Experiment 3, collinear incoherent mode combination for information encoding [13].…”

Section: Discussionmentioning

confidence: 99%

Optical coherenscopy based on phase-space tomography

Cámara¹,

Rodrigo²,

Alieva³

2013

Opt. Express

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Abstract:Partially coherent light provides attractive benefits in imaging, beam shaping, free-space communications, random medium monitoring, among other applications. However, the experimental characterization of the spatial coherence is a difficult problem involving second-order statistics represented by four-dimensional functions that cannot be directly measured and analyzed. In addition, real-world applications usually require quantitative characterization of the local spatial coherence of a beam in the absence of a priori information, together with fast acquisition and processing of the experimental data. Here we propose and experimentally demonstrate a technique that solves this problem. It comprises an optical setup developed for automatized video-rate measurement and a method -phase-space tomographic coherenscopy-allowing parallel data acquisition, processing, and analysis. This technique significantly simplifies the spatial coherence analysis and opens up new perspectives for the development of tools exploiting the degrees of freedom hidden into light coherence.

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Section: Discussionmentioning

confidence: 99%

Optical coherenscopy based on phase-space tomography

Cámara¹,

Rodrigo²,

Alieva³

2013

Opt. Express

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“…Moreover, in recent research, it has already been reported that coherent as well as partially coherent DHBs are less affected by the atmospheric turbulence [15].…”

Section: Importance Growth Avenues and Future Challengesmentioning

confidence: 97%

Spectral Anomalies of Polychromatic DHGB and Its Applications in FSO

Kandpal

2011

J. Lightwave Technol.

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Abstract-This paper contains some interesting experimental results of the study carried out on anomalous spectral behavior due to coherence and polarization change on polychromatic focused dark hollow Gaussian beam (DHGB). On the basis of experimental and numerical analysis, the possibility and significance of DHGB based free-space optical (FSO) links for indoor and outdoor optical communications are explored.Index Terms-Dark hollow Gaussian beam, free-space optical communication, spectral switching.

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“…Paraxial propagation properties of such beams have been studied in detail. It has been shown that the PCDHBs are less sensitive to phase distortion and are less affected by atmospheric turbulence [13,14]. Thus, these beams might find potential applications in FSO communications.…”

Section: Introductionmentioning

confidence: 99%

Effect of coherence and polarization on the polychromatic partially coherent dark hollow beam generated from axicon-lens system

Joshi¹,

Bk²,

Khan³

et al. 2014

J. Opt.

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An experimental study is carried out to investigate the effect of coherence and polarization on the polychromatic partially coherent dark hollow beam (PCDHB). The experimental results show that the spatial coherence and source polarization affect the dark region of the generated hollow beam. The study shows that by varying the source degree of polarization (DOP), we get a tunable dark region. We find that the longer the spatial coherence length of the input beam, the larger the central dark size of the resultant PCDHB. Further, it is shown that polychromatic PCDHB with low spatial coherence travel a longer distance without being distorted than a beam with a high spatial coherence. These kinds of polychromatic beams may find potential application in the field of polychromatic light based free-space optical (FSO) communications.

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M^2-factor of coherent and partially coherent dark hollow beams propagating in turbulent atmosphere

Cited by 133 publications

References 47 publications

Optical coherenscopy based on phase-space tomography

Optical coherenscopy based on phase-space tomography

Spectral Anomalies of Polychromatic DHGB and Its Applications in FSO

Effect of coherence and polarization on the polychromatic partially coherent dark hollow beam generated from axicon-lens system

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