物理学报Issue(4)：162-166,5.DOI:10.7498/aps.62.044203
伪部分相干高斯-谢尔模型光束在湍流大气中传播的闪烁孔径平滑效应
The aperture averaging effect of scintillation of pseudo-partially Gaussian-Schell model beam propagation in turbulent atmosphere∗
摘要
Abstract
By using numerical simulation, the propagation of pseudo-partially coherent Gaussian-Schell model beam in atmospheric turbu-lence is simulated. The properties of intensity fluctuation of different receiving aperture and aperture averaging factors are statistically analyzed. And the influence of relative changing frequency of the modulating phase which models the partial coherence of beam source on scintillation index is also discussed. The simulation results of pseudo-partially coherent beam are compared with those of the well-developed partially coherent beam and fully coherent Gaussian beam. It is found that the reduction of coherence degree may cause scintillation index to decrease. However, the aperture averaging effect is weakened at the same time. At the same receiving aperture diameter, the aperture averaging factor of pseudo-partially coherent beam is greater than that of the fully coherent beam. The increase of relative changing frequency of modulating phase may cause a reduction of scintillation index to some degree. And with the increase of relative changing frequency, the scintillation index of pseudo-partially coherent beam tends to be coincident with that of the partially coherent beam.关键词
伪部分相干高斯-谢尔模型光束/湍流大气/孔径平滑闪烁指数/数值模拟Key words
pseudo-partially coherent Gaussian-Schell model beam/turbulent atmosphere/aperture averaging scin-tillation index/numerical simulation引用本文复制引用
钱仙妹,朱文越,饶瑞中..伪部分相干高斯-谢尔模型光束在湍流大气中传播的闪烁孔径平滑效应[J].物理学报,2013,(4):162-166,5.基金项目
国家自然科学基金(批准号:11074120)和南京大学大学生创新训练计划(批准号:XZ1110284048)资助的课题 （批准号:11074120）
