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多高斯-榭尔光束通过强湍流对光强闪烁的影响
引用本文:刘维慧,吴健.多高斯-榭尔光束通过强湍流对光强闪烁的影响[J].应用光学,2005,26(1):25-28.
作者姓名:刘维慧  吴健
作者单位:电子科技大学,光电信息学院,四川,成都,610054
摘    要:在Rytov方差的基础上,利用Andrews的唯像闪烁模型,推导出部分相干光通过强大气湍流后的对数光强起伏方差,并在此基础上进行了仿真.结果表明,当光源的相干性变差,即变为部分相干光后,对数光强起伏方差变小;当采用多束部分相干光通过大气湍流时,接收面上光强起伏方差得到明显改善,并且光束越多,改善越明显,但利用部分相干光通信时传输距离受限制.所以,光源的相干参数选择要适当.

关 键 词:强湍流  部分相干  对数光强起伏方差  折射率结构常数  内尺度
文章编号:1002-2082(2005)01-0025-04
收稿时间:2003/8/8

Effect of Mutiple Gaussian-Schell Beams through Strong Turbulence on Log-intensity Variance
LIU Wei-hui,WU Jian.Effect of Mutiple Gaussian-Schell Beams through Strong Turbulence on Log-intensity Variance[J].Journal of Applied Optics,2005,26(1):25-28.
Authors:LIU Wei-hui  WU Jian
Institution:College of Opto-Electronic Information, UESTC, Chengdu 610054, China
Abstract:On the basis of Rytov variance, the log-intensity variance when partially coherent beam goes through strong turbulenc with Andrews model is deduced . The result shows along with the light source coherence becomes worse, that is the light becomes partially coherent light,the log-intensity variance on the receiving plane decreases. When the partially coherent light in multiple beams are used, the log-intensity variance is distinctly improved. But the transmission distance of communication is limited, when the coherence is bad. Therefor, the value of coherence parameter must be chosen properly.
Keywords:strong turbulence  partial coherence  atmospheric refractive index structure constant  inner scale
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