| ELGB在湍流大气中通过圆形光阑的传输特性 |
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| 引用本文： | 费津程,崔执凤,王家驷,屈军.ELGB在湍流大气中通过圆形光阑的传输特性[J].激光技术,2011,35(6):849-853. |
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| 作者姓名： | 费津程 崔执凤 王家驷 屈军 |
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| 作者单位： | 1.安徽师范大学物理与电子信息学院, 芜湖 241000 |
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| 基金项目： | 安徽省自然科学基金，安徽省高校自然科学研究资助项目 |
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| 摘 要： | 为了研究复宗量拉盖尔-高斯光束在湍流大气中通过圆形光阑的传输特性,采用拓展的惠更斯-菲涅耳原理进行了理论推导和数值计算,得到了光强表达式和相应的计算图像。结果表明,光束在湍流大气中受到光阑限制传输时,当截断参量61,光束能够长距离传输且与源场时的光束横截面光强分布大致类似,仍为空心光束,但中心处光强的归一化值大于0;当截断参量1时,小孔的衍射效应不明显,与无小孔限制时非常类似,光束横截面光强分布变为高斯形状;大气湍流强度越小,越容易保持源场时的光束横截面光强分布;不同阶数光束在湍流大气中的传输特性也做了相应研究。该结果对于从事激光传输与自由空间光通讯是有帮助的。
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| 关 键 词： | 大气与海洋光学 复宗量拉盖尔-高斯光束 拓展的惠更斯-菲涅耳原理 湍流大气 光阑 |
| 收稿时间： | 2010-12-27 |
Propagation characteristics of elegant Laguerre-Gaussian beam passing through a circular aperture in turbulent atmosphere |
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| FEI Jin-cheng,CUI Zhi-feng,WANG Jia-si,QU Jun.Propagation characteristics of elegant Laguerre-Gaussian beam passing through a circular aperture in turbulent atmosphere[J].Laser Technology,2011,35(6):849-853. |
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| Authors: | FEI Jin-cheng CUI Zhi-feng WANG Jia-si QU Jun |
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| Abstract: | In order to study propagation characteristics of elegant Laguerre-Gaussian beam(ELGB) passing through a circular aperture in turbulent atmosphere, corresponding analytical formulate based on the extend Huygens-Fresnel integral were deduced and numerical simulation results were obtained. The results indicate that when the value of the truncation parameter 1, the beam profile of ELGB after propagating long distance is similar to that of the source, i.e., hallow beam, but the central normalized intensity is larger than 0; however, the profile tends to Gaussian distribution as the parameter 1. Meanwhile, the weaker the turbulent atmosphere is, the more easily it can preserve the average intensity profile as the source. And the average intensity profiles of different beam orders were also studied. The results are useful to laser beam propagation and free-space laser communication. |
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