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Research on performance of convex partially coherent flat-topped beams in vertical atmospheric turbulent paths
Optics Communications ( IF 2.4 ) Pub Date : 2021-03-01 , DOI: 10.1016/j.optcom.2020.126577
Xiaoxin Zhou , Zeyu Zhou , Xiuhua Yuan

Abstract Previous studies on non-uniformly correlated (NUC) beams mainly focus on beams with Gaussian amplitude profiles. In this paper we research a new class of non-uniformly correlated flat-topped beams, which are called convex partially coherent flat-topped (CPCFT) beams. Using wave optics simulation (WOS), we investigate the propagation properties of such beams in vertical atmospheric turbulent paths in detail and calculated the mean signal-to-noise ratio (SNR) and bit-error rate (BER). It is found that CPCFT beams will self-focus during propagation, resulting in larger on-axis intensity than Gaussian Schell-model (GSM) and PCFT beams, and they also have smaller scintillation in most cases. These properties have made CPCFT beams effective for improving the mean SNR and reducing the mean BER. WOS results show that turbulence induced degradation can be dramatically reduced by using CPCFT beams under certain circumstances.

中文翻译:

垂直大气湍流路径中凸部分相干平顶光束的性能研究

摘要 以前对非均匀相关 (NUC) 光束的研究主要集中在具有高斯幅度分布的光束上。在本文中,我们研究了一类新的非均匀相关平顶光束,称为凸部分相干平顶 (CPCFT) 光束。使用波动光学模拟 (WOS),我们详细研究了此类光束在垂直大气湍流路径中的传播特性,并计算了平均信噪比 (SNR) 和误码率 (BER)。发现CPCFT光束在传播过程中会自聚焦,导致轴上强度比高斯谢尔模型(GSM)和PCFT光束更大,并且在大多数情况下它们的闪烁也更小。这些特性使 CPCFT 波束对于提高平均 SNR 和降低平均 BER 非常有效。
更新日期:2021-03-01
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