余弦高斯光束在海洋湍流中的传输特性  

Propagation Properties of Cosine-Gaussian-Correlated Beams in Oceanic Turbulence

作　　者：李沪光 付静静 周健阳 

机构地区：[1]上海理工大学理学院,上海

出　　处：《应用物理》2023年第5期202-212,共11页Applied Physics

摘　　要：基于光的相干偏振的统一理论和扩展的惠更斯–菲涅耳原理,研究了余弦高斯谢尔模型光束(CGSM)在海洋湍流中的传播。推导了CGSM光束在海洋湍流中传播的交叉谱密度的解析公式。通过数值模拟,解释了CGSM光束在海洋湍流中传播的光谱强度分布和光谱相干度的统计特征。此外,还详细讨论了海洋湍流参数对CGSM光束传输质量的影响。研究发现,单位质量湍流动能耗散率、湍流内尺度以及盐度引起的湍流涨落等对CGSM光束的传播特性均有影响。Based on the unified theory of coherence and polarization of light and the extended Huygens-Fresnel principle, we have investigated the propagation of Cosine-Gaussian spectral coherence Schell model (CGSM) beams in ocean turbulence. We have derived the analytical formula of cross spectral density of CGSM beam propagating in oceanic turbulence. Through numerical simulation, the statistical characteristics of spectral intensity distribution and coherence of CGSM beam propagating in oceanic turbulence are explained. In addition, we discussed in detail the effect of ocean parameters on the transmission quality of CGSM beams. It is found that the kinetic energy dissipation rate per unit fluid mass, turbulent internal scale of fluid per unit mass and turbulent fluctuation caused by salinity all have effects on the propagation characteristics of CGSM beam.

关 键 词：余弦高斯光束 海洋湍流模型 光谱强度 光谱相干度 

分 类 号：O43[机械工程—光学工程]