Effects of atmospheric turbulence on the polarization of apertured electromagnetic Gaussian Schell-model beams

Effects of atmospheric turbulence on the polarization of apertured electromagnetic Gaussian Schell-model beams
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大气湍流对孔径电磁高斯谢尔模型光束偏振的影响

DOI:
10.1088/1464-4258/11/4/045701
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发表时间:
2009-01
期刊:
J. Opt. A: Pure Appl. Opt.
影响因子:
--
通讯作者:
Xiaoling Ji
Xiaoling Ji
中科院分区:
其他
文献类型:
--
作者:
Zhengcai Pu;Xiaoling Ji

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研究了大气湍流对孔径电磁高斯谢尔模型 (EGSM) 光束偏振的影响。推导了通过大气湍流传播的孔径 EGSM 光束的偏振度的封闭式表达式。结果表明,在足够长的距离上传播时,具有不同光束截断参数和光束相干参数值的孔径EGSM光束的偏振度在源平面处趋于相同值,并且由于湍流而变得均匀,这与自由空间中的行为有很大不同。光束截断参数越小,偏振度受湍流的影响越小。特别是,有孔 EGSM 光束的偏振度对湍流影响的敏感度低于无孔 EGSM 光束的偏振度。
The effects of atmospheric turbulence on the polarization of apertured electromagnetic Gaussian Schell-model (EGSM) beams are studied. The closed-form expression for the degree of polarization of apertured EGSM beams propagating through atmospheric turbulence is derived. It is shown that on propagation over sufficient long distances the degree of polarization of apertured EGSM beams with different values of beam truncation parameter and beam coherence parameter tends to the same value at the source plane and becomes uniform due to turbulence, which is quite different from the behavior in free space. The smaller the beam truncation parameter is, the less the degree of polarization is affected by turbulence. In particular, the degree of polarization of apertured EGSM beams is less sensitive to the effects of turbulence than that of unapertured EGSM beams.
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