Turbulence-induced degradation properties of partially coherent flat-topped beams

Alavinejad, M.; Ghafary, Bijan

doi:10.1016/j.optlaseng.2007.12.005

Cited by 42 publications

(6 citation statements)

References 26 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In general, the atmospheric turbulence will cause the extra spreading beyond the diffraction, wander and scintillation of laser beams, which limits the performance in the previously mentioned applications. Thus, knowledge of the propagation behavior of light beams in atmospheric turbulence is utmost significant [19][20][21][22][23][24][25][26][27][28][29][30][31][32][33][34]. It is known that decreasing spatial coherence and modulating polarization distribution of light beams are two effective methods to reduce the turbulence-induced degradation.…”

Section: Introductionmentioning

confidence: 99%

Effect of the atmospheric turbulence on a special correlated radially polarized beam on propagation

Cui

Wei

Wang

et al. 2015

Optics Communications

View full text Add to dashboard Cite

Section: Introductionmentioning

confidence: 99%

Effect of the atmospheric turbulence on a special correlated radially polarized beam on propagation

Cui

Wei

Wang

et al. 2015

Optics Communications

View full text Add to dashboard Cite

“…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%

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

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.

show abstract

“…In the past decades, most research on partially coherent beams is devoted to Gaussian Schell-model beams whose intensity distribution and degree of coherence are Gaussian functions. Recently, more and more attention is being paid to Schell-model beams with special profiles [42,[48][49][50][51][52][53][54][55][56][57][58][59][60][61][62][63], such as partially coherent Hermite-Gaussian beams, partially coherent dark hollow beams, partially coherent flat-topped beams, partially coherent vortex beams, partially coherent cosh-Gaussian, cos-Gaussian and cosine-Gaussian beam, partially coherent Laguerre-Gaussian (0,1) beams, due to their important potential applications in various fields, including free-space optical communication, optical trapping and singular optics.…”

Section: Introductionmentioning

confidence: 99%

“…Partially coherent vortex beams [61,62] and partially coherent LG(0,1) beams [63] can be regarded as special cases of partially coherent LG beams. Recent research has shown that partially coherent beams with special profiles have advantages over corresponding coherent beams for reducing turbulenceinduced intensity fading in laser communication systems [50,52,[55][56][57]62], and for optical trapping [42]. We expect to apply partially coherent standard or elegant LG beam of all orders to free-space optical communication and optical trapping.…”

Section: Introductionmentioning

confidence: 99%

Partially coherent standard and elegant Laguerre-Gaussian beams of all orders

2009

View full text Add to dashboard Cite

Partially coherent standard and elegant Laguerre-Gaussian (LG) beams of all orders are introduced as a natural extension of coherent standard and elegant LG beams to the stochastic domain. By expanding the LG modes into a finite sum of Hermite-Gaussian modes, the analytical formulae are obtained for the cross-spectral densities of partially coherent standard and elegant LG beams in the source plane and after passing through paraxial ABCD optical system, based on the generalized Collins integral formula. A comparative study of the propagation properties of the partially coherent standard and elegant LG beams in free space is carried out via a set of numerical examples. Our results indicate that the intensity and spreading properties of partially coherent standard and elegant LG beams are closely related to their initial coherence states, and are very different from the corresponding results for the coherent standard and elegant LG beams. In particular, an elegant LG beam spreads slower than a standard LG beam, while this advantage disappears when their initial coherences are very small. Our results may find applications in connection with laser beam shaping, singular optics and astrophysical measurements of angular momentum of radiation.

show abstract

Turbulence-induced degradation properties of partially coherent flat-topped beams

Cited by 42 publications

References 26 publications

Effect of the atmospheric turbulence on a special correlated radially polarized beam on propagation

Effect of the atmospheric turbulence on a special correlated radially polarized beam on propagation

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

Partially coherent standard and elegant Laguerre-Gaussian beams of all orders

Contact Info

Product

Resources

About