Browsing by Author "Chen, Yahong"

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Citation Count: Yuan, Y...et al. (2013). Effect of spatial coherence on the scintillation properties of a dark hollow beam in turbulent atmosphere. Applied Physisc B-Lasers And Optics, 110(4), 519-529. http://dx.doi.org/10.1007/s00340-012-5288-y
Effect of spatial coherence on the scintillation properties of a dark hollow beam in turbulent atmosphere
(Springer, 2013) Yuan, Yangsheng; Chen, Yahong; Liang, Chunhao; Cai, Yangjian; Baykal, Yahya; 7812
With the help of a tensor method, we derive an explicit expression for the on-axis scintillation index of a circular partially coherent dark hollow (DH) beam in weakly turbulent atmosphere. The derived formula can be applied to study the scintillation properties of a partially coherent Gaussian beam and a partially coherent flat-topped (FT) beam. The effect of spatial coherence on the scintillation properties of DH beam, FT beam and Gaussian beam is studied numerically and comparatively. Our results show that the advantage of a DH beam over a FT beam and a Gaussian beam for reducing turbulence-induced scintillation increases particularly at long propagation distances with the decrease of spatial coherence or the increase of the atmospheric turbulence, which will be useful for long-distance free-space optical communications
Citation Count: Yuan, Y...et al. (2013). Scintillation index of a multi-Gaussian Schell-model beam in turbulent atmosphere. Optics Communications, 305, 57-65. http://dx.doi.org/10.1016/j.optcom.2013.04.076
Scintillation index of a multi-Gaussian Schell-model beam in turbulent atmosphere
(Elsevier Science Bv, 2013) Yuan, Yangsheng; Liu, Xianlong; Wang, Fei; Chen, Yahong; Cai, Yangjian; Qu, Jun; Eyyuboğlu, Halil T.; 7688
Multi-Gaussian Schell-model (MGSM) beam was introduced recently [Sahin and Korotkova, Opt. Lett. 37 (2012) 2970; Korotkova et al., J. Opt. Soc. Am. A 29 (2012) 2159]. In this paper, an explicit expression for the scintillation index of a multi-Gaussian Schell-model (MGSM) beam in weakly or extremely strong turbulent atmosphere is derived with the help of a tensor method. Applying the derived formulae, the scintillation properties of a MGSM beam and a GSM beam in weakly or extremely strong turbulent atmosphere are studied numerically and comparatively. Our results show that a MGSM beam has advantage over a GSM beam for reducing turbulence-induced scintillation, which will be useful for long-distance free-space optical communications.