研究余弦-高斯相关谢尔模型(CGSM))脉冲光束经准均匀介质散射的相干特性,得到远场处散射场时间相干度的解析表达式。讨论脉冲参数和介质特性对散射场时间相干度的影响。数值计算结果表明,余弦阶数对散射场时间相干度分布有着重要影响。对比研究高斯谢尔模型脉冲光束和CGSM脉冲光束的相干特性,详细分析两者间的异同点。

We investigate the coherence properties of a cosine-Gaussian-correlated Schell-model (CGSM) pulse scattered from a quasi-homogeneous random medium. Further, we derive an analytic expression to obtain the temporal coherent degree of the scattered field in the far-zone and investigate the influences of the pulse parameters and properties of the medium on the temporal coherent degree of the scattered field. The numerical calculations denote that the cosine order plays an important role in the distribution of temporal coherent degree of the scattered field. Furthermore, we compare the coherent characteristics, similarities, and differences between a CGSM pulse and a Gaussian Schell-model pulse.