| 高斯-谢尔光束在斜程大气湍流中的短期光束展宽 |
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| 引用本文： | 向宁静,王巧艳,华雪侠.高斯-谢尔光束在斜程大气湍流中的短期光束展宽[J].咸阳师范学院学报,2014(2):15-18. |
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| 作者姓名： | 向宁静 王巧艳 华雪侠 |
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| 作者单位： | [1]咸阳师范学院物理与电子工程学院,陕西咸阳712000 [2]武功县代家初级中学,陕西武功712200 |
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| 基金项目： | 国家自然科学基金项目（61271110,61102018）. |
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| 摘 要： | 基于广义惠更斯-菲涅耳原理，利用Yura期展宽理论和ITu-R大气结构模型，研究斜程湍流大气部分相干高斯-谢尔（GSM）光束的短期光束展宽。根据推导的解析表达式，得出短期光束展宽小于长期光束展宽。数值模拟了短期光束展宽随波长、初始半径、接收机高度、光源相干性的变化。结果表明：当增加入射波波长、增大波束初始半径、提高接收机高度时，光源相干性变差，短期光束展宽变小，受大气湍流影响小，有利于激光通信。
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| 关 键 词： | 大气湍流 高斯-谢尔光束 斜程 短期展宽 |
Short-term Spread and Wander of a Partially Coherent Gaussian Schell-model Beam Propagation in Slant Atmospheric Turbulence |
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| XIANG Ning-jing,WANG Qiao-yan,HUA Xue-xia.Short-term Spread and Wander of a Partially Coherent Gaussian Schell-model Beam Propagation in Slant Atmospheric Turbulence[J].Journal of Xianyang Normal University,2014(2):15-18. |
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| Authors: | XIANG Ning-jing WANG Qiao-yan HUA Xue-xia |
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| Institution: | 1. School of Physics and Electronic Engineering, Xianyang Normal University, Xianyang 712000,Shaanxi,China; 2. Wugong Daijia High School,Wugong 712200,Shaanxi,China) |
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| Abstract: | Based on the extended Huygens - Fresnel integral, the Yura theory and ITU-R model, the short-term spread of a partially coherent Gaussian-Schell-model （GSM） beam in slant turbulent at- mosphere is obtained. In terms of expression, short-term spread is less than long-term spread in turbu- lence. The numerical conclusions indicate that beam short-term spread has relation with the initial beam radius, the height of receiver, the wavelength and the coherence width of source. The higher receiver, the larger initial beam radius and wavelength, the smaller coherence width of source, the smaller the short-term beam spread, then short-term spread becomes small or the GSM is less affected by turbu- lence, which is good for laser communication. |
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| Keywords: | atmospheric turbulence Gaussian Schell-model beam slant path short-term spread |
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