余弦-高斯相关谢尔模型脉冲光束经随机介质散射的相干特性  

Coherence Properties of Cosine-Gaussian-Correlated Schell-Model Pulse After Random Medium Scattering

作　　者：赵新亮 王海霞[2] 张永涛[2] 李同海 Zhao Xinliang;Wang Haixia;Zhang Yongtao;Li Tonghai(CAMA(Luoyang)Measurement&Control Equipments Co.Ltd.,Luoyang,Heyian 471009,China;College of Physical&Electronic Information,Luoyang Normal University t Luo yang,Henan 471934,China)

机构地区：[1]凯迈(洛阳)测控有限公司,河南洛阳471009 [2]洛阳师范学院物理与电子信息学院,河南洛阳471934

出　　处：《光学学报》2019年第11期22-29,共8页Acta Optica Sinica

基　　金：国家自然科学基金(11474143);国家航空基金(20150172002);河南省高等学校青年骨干教师培养计划(2016GGJS-116)

摘　　要：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.

关 键 词：相干光学 散射 余弦-高斯相关谢尔模型脉冲光束 准均匀介质 时间相干度 

分 类 号：O435[机械工程—光学工程]