Polarization characteristics of aberrated partially coherent flat-topped beam propagating through turbulent atmosphere

Kashani, F.D.; Alavinejad, M.; Ghafary, Bijan

doi:10.1016/j.optcom.2009.07.008

Cited by 34 publications

(13 citation statements)

References 18 publications

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“…Furthermore, we have found that there exist equivalent partially coherent standard and elegant LG beams, equivalent fully coherent standard and elegant LG beams, Gaussian Schell-model beams that may have the same directionality as a fully coherent Gaussian beam both in free space and in turbulence atmosphere under the condition of Eq. (22). Our formulae are valid for both weak and strong turbulence conditions.…”

Section: Resultsmentioning

confidence: 81%

“…Various methods have been proposed to overcome or reduce the turbulenceinduced degradation of laser beams [1]. It was shown that partially coherent beams are less affected by turbulence than fully coherent beams [2,7,10,[13][14][15][16][17][18][20][21][22][23]. The use of higher-order beams such as Hermite-Gaussian, Hermite-Sine-Gaussian, Hermite-sinh-Gaussian and Laguerre-Gaussian (LG) beams also can reduce the turbulenceinduced degradation [3][4][5][6].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Average Intensity and Spreading of Partially Coherent Standard and Elegant Laguerre-Gaussian Beams in Turbulent Atmosphere

Wang¹,

Cai²,

Eyyuboğlu³

et al. 2010

PIER

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Abstract-Analytical expressions for the average intensity, meansquared beam width and angular spread of partially coherent standard and elegant Laguerre-Gaussian (LG) beams propagating in turbulent atmosphere are derived. The properties of the average intensity, spreading and directionality of partially coherent standard and elegant LG beams in turbulent atmosphere are studied numerically and comparatively. It is found that the beam parameters and structure constant of turbulence together determine the properties of the beams in turbulent atmosphere. Partially coherent standard and elegant LG beams with smaller coherence length, larger beam orders and longer wavelength are less affected by the turbulence. A partially coherent elegant LG beam is less affected by turbulence than a partially coherent standard LG beam under the same condition. Furthermore, it is found that there exist equivalent partially coherent standard and elegant LG beams, equivalent fully coherent standard and elegant LG beams, equivalent Gaussian Schell-model beams that may have the same directionality as a fully coherent Gaussian beam both in free space and in turbulent atmosphere. Our results will be useful in long distance free-space optical communications.

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Section: Resultsmentioning

confidence: 81%

Section: Introductionmentioning

confidence: 99%

Average Intensity and Spreading of Partially Coherent Standard and Elegant Laguerre-Gaussian Beams in Turbulent Atmosphere

Wang¹,

Cai²,

Eyyuboğlu³

et al. 2010

PIER

View full text Add to dashboard Cite

show abstract

“…The aforementioned papers [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19] follow the suit, and describe wave propagation of the polarized waves by a pair of uncoupled scalar equations. As a result depolarization is completely disregarded by this propagation model.…”

Section: Propagation Of Short Electromagnetic Waves In the Turbulent mentioning

confidence: 99%

Coherence of beam arrays propagating in the turbulent atmosphere

Charnotskii

2010

SPIE Proceedings

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We analyze some recent publications addressing propagation of the partially coherent polarized beams and beam arrays in the turbulent atmosphere. We show that the published results are limited to the scalar propagation model, and are not particular to the beam polarization. Therefore these results are equally relevant for the scalar beam pairs and arrays discriminated by some parameters such as small frequency shift, time delay or geometry, but not necessary the polarization. We use the virtual incoherent source model to derive the general form of the mutual coherence function of the two Schell-type beams. We discuss some physical stochastic models that result in the creation of the Schell-type beams and beam arrays. New classes of the uniformly, nonuniformly and nonlocally coherent beam pairs emerge naturally from this analysis. Rigorous, Markov approximation-based, propagation model provides relatively simple analytic results for the second-order moments of the optical field of the partially-coherent individual beams and beam pairs. We examine the changes of the beam mutual coherence in the process of the free-space propagation and propagation through the turbulent atmosphere.

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“…The normalized spectrum of the beam generated by QH source after propagating through turbulent media has been proved to be equal to the normalized spectrum of the source [12]. The degree of polarization of electromagnetic Gaussian-Schell beams and partially coherent electromagnetic flat-topped beams also have self-reconstructed properties in atmospheric turbulence [13][14]. However, recent reports have shown that beams generated from anisotropic sources don't have polarization self-reconstructed properties in turbulent media [15][16].…”

Section: Introductionmentioning

confidence: 99%

Polarization Properties of Quasi-Homogeneous Beams Propagating in Oceanic Turbulence

Chen¹,

Zhao²,

Chen³

et al. 2013

Journal of the Optical Society of Korea

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Based on the extended Huygens-Fresnel principle and generalized Stokes theory, the evolution of polarization properties of beams generated by quasi-homogenous (QH) sources propagating in clear oceanic water was studied by the use of the oceanic turbulence spatial spectrum function. The results show that the beams have similar polarization self-reconstructed behavior under different turbulence conditions in the far field, but if the propagation distance is not long enough, the degree of polarization (DOP) fluctuates with much more complexity than state of polarization (SOP) of QH beams. The self-reconstructed ability of DOP at the special distance in turbulence would get to the best value if the values of coherence of width were chosen suitably, but for SOP, it has no best value.

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Polarization characteristics of aberrated partially coherent flat-topped beam propagating through turbulent atmosphere

Cited by 34 publications

References 18 publications

Average Intensity and Spreading of Partially Coherent Standard and Elegant Laguerre-Gaussian Beams in Turbulent Atmosphere

Average Intensity and Spreading of Partially Coherent Standard and Elegant Laguerre-Gaussian Beams in Turbulent Atmosphere

Coherence of beam arrays propagating in the turbulent atmosphere

Polarization Properties of Quasi-Homogeneous Beams Propagating in Oceanic Turbulence

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