| 部分相干平顶光束在大气湍流中空间相干性研究 |
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| 引用本文： | 步青华,王海燕,李相银.部分相干平顶光束在大气湍流中空间相干性研究[J].大气与环境光学学报,2009,4(1):13-21. |
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| 作者姓名： | 步青华 王海燕 李相银 |
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| 作者单位： | 南京理工大学理学院,江苏,南京,210094 |
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| 摘 要： | 采用Rytov相位结构函数二次近似的方法和广义惠更斯-菲涅耳原理,推导出了部分相干平顶光束通过大气湍流传输的空间相干度公式,研究了湍流对光束空间相干特性的影响.研究表明:部分相干平顶光束的空间相干性由大气湍流折射率结构常数、光束的相对空间相关长度、平顶光束的阶数、传输距离和观察点位置坐标等因素共同确定.部分相干平顶光束通过湍流大气传输时,其空间相干度会出现振荡和相位奇异现象,但随着湍流的增强,振荡减弱,直至振荡和相位奇异现象消失.
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| 关 键 词： | 大气湍流 部分相干平顶光束 空间相干度 相位奇异 |
| 收稿时间： | 2008/11/7 |
Property of Spatial Degree of Coherence of Partially Coherent Flat-topped Beams Through Atmospheric Turbulence |
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| BU Qing-hua,WANG Hai-yan,LI Xiang-yin.Property of Spatial Degree of Coherence of Partially Coherent Flat-topped Beams Through Atmospheric Turbulence[J].Journal of Atmospheric and Environmental Optics,2009,4(1):13-21. |
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| Authors: | BU Qing-hua WANG Hai-yan LI Xiang-yin |
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| Affiliation: | BU Qing-hua,WANG Hai-yan,LI Xiang-yin (School of Sciences,Nanjing University of Science and Technology,Nanjing 210094,China) |
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| Abstract: | Based on the quadratic approximation of the Rytov's phase structure function and the Huygens-Fresnel principle,propagation equation for the spatial degree of coherence of partially coherent flat-topped beams propagating in turbulence atmosphere is derived,and the properties of the spatial degree of coherence in turbulence atmosphere are investigated numerically.The result shows that properties of spatial degree of coherence of partially coherent fiat-topped beams are determined by the refractive index struc... |
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| Keywords: | atmosphere turbulence partially coherent flat-topped beam spatial degree of coherence phase singularity |
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