Effects of coherence and polarization on the beam spreading and direction through atmospheric turbulence
Effects of coherence and polarization on the beam spreading and direction through atmospheric turbulence
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DOI：
10.1016/j.optcom.2011.05.080
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发表时间：
2011-09
影响因子：
2.4
通讯作者：
Guohua Wu;Bin Luo;Song Yu;A. Dang;Tonggang Zhao;Hong Guo
中科院分区：
文献类型：
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作者：
Guohua Wu;Bin Luo;Song Yu;A. Dang;Tonggang Zhao;Hong Guo
基于推广的惠更斯-菲涅耳原理，得到了电磁高斯-谢尔模型（EGSM）光束在湍流大气中传输的光束宽度和远场角扩展的解析表达式。详细研究了相干性和偏振性对大气湍流中光束扩展和方向性的影响。得到了不同空间相干度和偏振度的光束在湍流大气中产生相同远场角扩展的条件。我们的结果在长距离自由空间光通信中具有潜在的应用价值。
Based on extended Huygens-Fresnel principle, analytical expressions of beam width and far-field angular spreading for electromagnetic Gaussian Schell-model (EGSM) beams propagating in atmospheric turbulence are obtained. The effects of coherence and polarization on beam spreading and directionality in atmospheric turbulence are investigated in detail. A condition is obtained under which beams with different degrees of spatial coherence and polarization will generate the same far-field angular spreading in atmospheric turbulence. Our results have potential application in long-distance free space optical communications.