| 离轴扭曲各向异性高斯-谢尔模型光束在湍流大气中的传播 |
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| 引用本文： | 王海燕,李相银.离轴扭曲各向异性高斯-谢尔模型光束在湍流大气中的传播[J].南京理工大学学报(自然科学版),2009,33(2). |
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| 作者姓名： | 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： | 该文基于广义惠更斯-菲涅耳原理,利用部分相干光复曲率张量推导出了离轴扭曲各向异性高斯-谢尔模型光束在湍流大气中传播的解析表达式,详细研究了该类光束在湍流大气中的传播特性.研究表明:离轴扭曲各向异性高斯-谢尔模型光束光斑在湍流大气中将退化为非离轴高斯圆形光斑;离轴参数与传播距离之间的关系曲线随着湍流强度的减弱、扭曲参数的增大以及光源相干性减弱变化缓慢.结果还表明,利用部分相干光复曲率张量分析各类高斯-谢尔光束在大气湍流中的传播和变换特性是一种简单有效的方法.
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| 关 键 词： | 光束传输 离轴扭曲各向异性高斯-谢尔模型光束 湍流大气 复曲率张量 |
Propagation of Decentered Twist Anisotropic Gaussian-Schell Model Beam in Turbulent Atmosphere |
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| WANG Hai-yan,LI Xiang-yin.Propagation of Decentered Twist Anisotropic Gaussian-Schell Model Beam in Turbulent Atmosphere[J].Journal of Nanjing University of Science and Technology(Nature Science),2009,33(2). |
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| Authors: | WANG Hai-yan LI Xiang-yin |
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| Institution: | School of Sciences;NUST;Nanjing 210094;China |
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| Abstract: | Based on the extended Huygens-Fresnel integral,analytical formulas are derived for the propagation of a decentered twisted anisotropic Gaussian-Schell model(DTAGSM) beam in a turbulent atmosphere by the use of partially coherent complex curvature tensor.Propagation properties of a DTAGSM beam in a turbulent atmosphere are investigated in detail.It is found that a DTAGSM beam becomes a circular and non-decentered beam in a turbulent atmosphere.Decentered parameter along with the propagation distance decrease... |
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| Keywords: | laser propagation decentered twisted anisotropic Gaussian-Schell model beams turbulent atmosphere complex curvature tensors |
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