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非均匀关联随机电磁光束的产生

昌成成 蒲继雄 陈子阳 陈旭东

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非均匀关联随机电磁光束的产生

昌成成, 蒲继雄, 陈子阳, 陈旭东

Generation of non-uniformly correlated stochastic electromagnetic beams

Chang Cheng-Cheng, Pu Ji-Xiong, Chen Zi-Yang, Chen Xu-Dong
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  • 从理论和实验两方面对非均匀关联随机电磁光束的产生进行了研究.在理论上基于相位关联与相干度的联系推导出非均匀关联随机电磁光束的22交叉谱密度矩阵及相干性分布.理论分析表明,这种非均匀关联随机电磁光束中两点间的相干度不仅和两点间距有关,而且和两点的位置有关.在实验上,利用两个相位型液晶空间光调制器对入射的完全相干光的两个偏振分量分别加载随机相位调制,并测量了随机电磁光束的相干度分布.实验结果表明,光束中间距相等的两点之间的相干度随着两点与光斑中心的距离的增加而减小.实验结果与理论结果一致.这种非均匀关联的随机电磁光束在自由空间光通信和激光微操控等领域具有广阔的应用前景.
    Until now, there have been many reports concerning the generation and propagation of partially coherent beams due to their less influencing ability in turbulent atmosphere and random media. Of particular interest, a Gaussian-Schell model beam has been widely chosen as a special example of partially coherent beam, since its spatial coherence degree is dependent on position only through the difference between the two position vectors. In the scalar domain, many coherent models have been well studied such as Gaussian and multi-Gaussian Schell-model sources, Bessel-Gaussian and Laguerre-Gaussian Schell-model sources and so on. Based on the theory for devising genuine cross-spectral density matrices for a stochastic electromagnetic beam, several scalar models have been also extended to the electromagnetic domain. In recent years, the propagation of partially coherent beams with spatially varying and non-uniform correlations has become a hot topic, because of their interesting characteristics such as locally sharpened and laterally shifted intensity maxima. In one of our previous studies, we have experimentally investigated the generation of non-uniformly correlated partially coherent beams. However, to the best of our knowledge, so far, there has been no investigation on the generation of non-uniformly correlated stochastic electromagnetic beams. In this paper, we theoretically and experimentally investigate the generation of non-uniformly correlated stochastic electromagnetic beams. Based on the relation between phase correlation and optical coherence, we investigate the 22 cross-spectral density matrix and the coherence distribution of the non-uniformly correlated stochastic electromagnetic beam we generated. It is shown that the coherence degree between two points in the generated beam depends not only on the distance between them, but also on the distances between the points and the center of the beam. In experiment, we use the Matlab rand function to generate a random phase pattern with uniform distribution. The modulation magnitudes of different positions are different and follow an inverse Gaussian distribution in position. Dynamic phase patterns are created from a series of random grey-scale images. Two phase-only liquid crystal spatial light modulators are employed to display computer-generated dynamic phase patterns and modulate the two orthogonally polarized components of the incident coherent light, respectively, and generate a stochastic electromagnetic beam. We measure the correlation distribution of the generated beam in Young's two-pinhole experiment. It is shown that the experimental observations are in agreement with our theoretical analyses. Other kinds of non-uniformly correlated stochastic electromagnetic beams can also be obtained by this approach. Non-uniformly correlated stochastic electromagnetic beams may have some applications in optical manipulation and free-space optical communication.
      通信作者: 陈旭东, chenxd@hqu.edu.cn
    • 基金项目: 国家自然科学基金(批准号:61605049,61575070,11304104,11674111)和华侨大学研究生科研创新能力培育计划资助的课题.
      Corresponding author: Chen Xu-Dong, chenxd@hqu.edu.cn
    • Funds: Project supported by the National Natural Science Foundation of China (Grant Nos. 61605049, 61575070, 11304104, 11674111) and the Subsidized Project for Cultivating Postgraduates' Innovative Ability in Scientific Research of Huaqiao University, China.
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    Mei Z R, Tong Z S, Korotkova O 2012Opt.Express 20 26458

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    Tong Z S, Korotkova O 2012J.Opt.Soc.Am.A 29 2154

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    Gu Y, Gbur G 2013Opt.Lett. 38 1395

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    Cui S W, Chen Z Y, Zhang L, Pu J X 2013Opt.Lett. 38 4821

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    Tervo J, SetlT, Friberg A T 2012Opt.Lett. 37 151

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    Mei Z R 2014Opt.Lett. 39 4188

    [2]

    Wang F, Korotkova O 2016Opt.Lett. 41 516

    [3]

    Hyde M W, Basu S, Voelz D G, Xiao X F 2015Opt.Eng.Lett. 54 120501

    [4]

    Pu J X, Dong M M, Wang T 2006Appl.Opt. 45 7553

    [5]

    Wang Y X, Meng P H, Wang D Y, Rong L, Panezai S 2013Opt.Express 21 19568

    [6]

    Redding B, Choma M A, Cao H 2012Nat.Photonics 6 355

    [7]

    Ryczkowski P, Turunen J, Friberg A T, Genty G 2016Sci.Rep. 6 22126

    [8]

    Gora M J, Sauk J S, Carruth R W 2013Nat.Med. 19 238

    [9]

    Arpali, Arpali S A, Baykal Y, Eyyuboğlu H T 2010Appl.Phys.B 103 237

    [10]

    Avramov-Zamurovic S, Nelson C, Guth S, Korotkova O, Malek-Madani R 2016Opt.Commun. 359 207

    [11]

    Wang X Y, Yao M W, Qiu Z L, Yi X, Liu Z J 2015Opt.Express 23 12508

    [12]

    Zhu Q Z, Wu F T, Hu R, Feng C 2016Acta Phys.Sin. 65 184101(in Chinese)[朱清智, 吴逢铁, 胡润, 冯聪2016物理学报65 184101]

    [13]

    Mei Z R, Mao Y H 2014Opt.Express 22 22534

    [14]

    Lajunen H, Saastamoinen T 2011Opt.Lett. 36 4104

    [15]

    Zhang L, Chen Z Y, Cui S W, Liu J L, Pu J X 2015Acta Phys.Sin. 64 034205(in Chinese)[张磊, 陈子阳, 崔省伟, 刘绩林, 蒲继雄2015物理学报64 034205]

    [16]

    Mei Z R, Tong Z S, Korotkova O 2012Opt.Express 20 26458

    [17]

    Tong Z S, Korotkova O 2012J.Opt.Soc.Am.A 29 2154

    [18]

    Gu Y, Gbur G 2013Opt.Lett. 38 1395

    [19]

    Cui S W, Chen Z Y, Zhang L, Pu J X 2013Opt.Lett. 38 4821

    [20]

    Chen X D, Chang C C, Chen Z Y, Lin Z L, Pu J X 2016Opt.Express 24 21587

    [21]

    Wolf E 2007Introduction to the Theory of Coherence and Polarization of Light(Cambridge:Cambridge University Press) pp174-179

    [22]

    Tervo J, SetlT, Friberg A T 2012Opt.Lett. 37 151

    [23]

    Wolf E 2003Phys.Lett.A 312 263

    [24]

    Shirai T, Wolf E 2004J.Opt.Soc.Am.A 21 1907

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出版历程
  • 收稿日期:  2016-10-02
  • 修回日期:  2016-11-21
  • 刊出日期:  2017-03-05

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