Statistic of a Gaussian beam from an arbitrary rough target in the single passage atmospheric turbulence  

作　　者：XIANG NingJing WU ZhenSen WANG MingJun 

机构地区：[1]School of Physics and Electronic Engineering, Xian Yang Normal College [2]School of Science, Xidian University

出　　处：《Science China(Physics,Mechanics & Astronomy)》2014年第10期1854-1859,共6页中国科学：物理学、力学、天文学（英文版）

基　　金：supported by the National Natural Science Foundation of China(Grant Nos.61172031,61271110 and 61102018);the New Scientific and Technological Star of Shaanxi Province Funded Project(Grant No.2011KJXX39);the Natural Science Foundation of Shaanxi Province education office,China(Grant No.12Jk0955)

摘　　要：The extended Huygens-Fresnel principle and Goodman model was utilized for target surface to derive the mutual coherence function(MCF) of a Gaussian beam reflected from an arbitrary rough target in atmospheric turbulence. According to the MCF, expressions of the mean irradiance and average speckle size at the receiver were obtained. The analysis indicated that the mean intensity is closely related to the ratio of root mean square(rms) height to the lateral correlation length. In addition, the speckle size at the receiver is associated with turbulence strength, propagation distance and roughness of the target. The results can be reduced to the result of a Gaussian beam illuminating rough target and scattering from a target in free space.The extended Huygens-Fresnel principle and Goodman model was utilized for target surface to derive the mutual coherence function （MCF） of a Gaussian beam reflected from an arbitrary rough target in atmospheric turbulence. According to the MCF, expressions of the mean irradiance and average speckle size at the receiver were obtained. The analysis indicated that the mean intensity is closely related to the ratio of root mean square （rms） height to the lateral correlation length. In addition, the speckle size at the receiver is associated with turbulence strength, propagation distance and roughness of the target. The results can be reduced to the result of a Gaussian beam illuminating rough target and scattering from a target in free space.

关 键 词：atmospheric turbulence arbitrary rough target mutual coherence function SPECKLE 

分 类 号：O357.5[理学—流体力学]