Changes of skewness and sharpness of partially coherent decentered annular beams on propagation

Changes of skewness and sharpness of partially coherent decentered annular beams on propagation
复制标题

部分相干偏心环形光束传播过程中偏斜度和锐度的变化

DOI:
10.1016/j.optcom.2015.00.019
复制
发表时间:
2016-01
影响因子:
2.4
通讯作者:
Wang Tao
Wang Tao
中科院分区:
物理与天体物理3区
文献类型:
--
作者:
Yang Ting;Ji Xiaoling;Li Xiaoqing;Zhang Hao;Wang Tao

文献摘要

参考文献

相似文献

研究了部分相干偏心环形光束(PCDA光束)在自由空间和海洋湍流中传输时光束的偏斜度和锐度的变化。基于Wigner分布函数,推导出PCDA光束的偏度参数A和峰度参数K的解析表达式。本文还导出了海洋湍流参数T ′与K的关系式,并对T ′的特性进行了分析。发现海洋湍流中的A和K的行为与自由空间中的行为有很大的不同。在自由空间中,强度分布的质量可以以一定的传播距离z 0从形心位置轴yc的一侧移动到另一侧,z 0与相关参数τ无关。只有在弱相干光束在自由空间中传输时,光强分布的质量才集中在光子传输的一侧,但当海洋湍流不弱时,不同的τ值总是这种情况。在自由空间中,它在远场呈现尖峰分布,高斯分布只出现在相干性差的光束中。然而,在海洋湍流中,对于不同的τ值,远场总是达到高斯分布。
Changes of skewness and sharpness of partially coherent decentered annular beams (PCDA beams) on propagation both in free space and in oceanic turbulence are studied. Based on the Wigner distribution function, the analytical expressions for the skewness parameterAand the kurtosis parameterKof PCDA beams are derived. The analytical expression for the oceanic turbulence parameterT′ related toKis also derived, and characteristics ofT′ are examined. It is found that the behaviors ofAandKin oceanic turbulence are quite different from those in free space. In free space, the mass of the intensity distribution may move from one side of the centroid position axisycto another side at a certain propagation distancez0, andz0is independent of the correlation parameterτ. The mass of the intensity distribution is concentrated on one side ofycon propagation only for a poorly coherent beam in free space, but it is always this situation for different value ofτwhen oceanic turbulence is not weak. In free space, it takes a leptokurtic profile in the far field, and a Gaussian profile appears only for a poorly coherent beam. However, in oceanic turbulence it always reaches a Gaussian profile for different value ofτin the far field.
DOI: 10.1007/bf01588604
发表时间: 1992-09
影响因子: 3
作者:
H. Weber
通讯作者: H. Weber
DOI: 10.1117/12.25903
发表时间: 1991-02
期刊: --
影响因子: --
作者:
M. Sanchez;Jose Luis Hernandez Neira;J. Delgado;G. Calvo
通讯作者: M. Sanchez;Jose Luis Hernandez Neira;J. Delgado;G. Calvo
DOI: 10.1364/josaa.31.001552
发表时间: 2014-07
期刊: Journal of the Optical Society of America. A, Optics, image science, and vision
影响因子: --
作者:
Y. Ata;Y. Baykal
通讯作者: Y. Ata;Y. Baykal
DOI: 10.1615/interjfluidmechres.v27.i1.70
发表时间: 2000
影响因子: 1.1
作者:
V. Nikishov;V. Nikishov
通讯作者: V. Nikishov;V. Nikishov
DOI: 10.1364/josaa.11.002643
发表时间: 1994-10-01
影响因子: 1.9
作者:
DRAGOMAN, D
通讯作者: DRAGOMAN, D