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Properties of Stochastic Electromagnetic Beams Propagating Through Atmospheric Turbulence
Pages: 195-200
Year: Issue:  3
Journal: Optoelectronic Technology

Keyword:  cross-spectral density matrixGaussian Schell-model beamsspectral densityspectral degree of polarizationspectral degree of coherencefree spaceatmospheric turbulence;
Abstract: 建立了随机电磁光束通过大气湍流的传输模型,并对比研究了高斯-谢尔模光束在大气湍流和自由空间的传输特性.研究表明,光谱偏振度随传输距离变化,并在远场趋于稳定;得到了远场稳定偏振度的解析表达式,其在大气湍流传输中与光束的自相关长度和互相关长度无关;光谱相干度在自由空间的远场趋于1,而在大气湍流的远场趋于0,并且湍流强度越大光谱相干度下降越快,光谱密度衰减越快.
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