中文摘要：

基于Rytov近似和Huygens-Fresnel原理,推导出外差激光雷达在non-Kolmogorov弱湍流中斜程探测时目标平面的平均光强和闪烁指数,得到外差激光雷达系统效率,并针对广义指数、天顶角、结构常量、基站结构、望远镜孔径和光束类型对系统效率的影响进行了研究.研究结果表明：当广义指数小于3.2或大于3.8时,外差激光雷达的系统效率减小幅度较大;随着天顶角的增大系统效率逐渐减小;双基站结构外差激光雷达的系统效率小于单基站结构;随着望远镜孔径的增大,系统效率存在最低值,并最终趋于平缓;近场时平行光系统效率最大,远场时发散光的系统效率最大.

英文摘要：

Based on Rytov approximation and extended Huygens-Fresnel principle,the analytical expressions for average intensity and scintillation index on target plane in non-Kolmogorov weak turbulence along slant paths were derived,the system efficiency of heterodyne lidar wass given.The system efficiency of heterodyne lidar is examined and the effects of exponent parameter,zenith angle,structure constant,system configurations and telescope aperture on system efficiency are also analyzed.It is shown that when the generalized index is less than 3.2or greater than 3.8,the system efficiency decreases fast as the index increases.System efficiency decreases with the increase of zenith angle.System efficiency of bistatic configurations is smaller than that of monostatic configurations.With the increase of the telescope aperture,the system efficiency arrives the minimum,and eventually flattens out.In near field,the system efficiency of collimated beam is larger than the other two forms,but in far field the system efficiency of divergent beam is the largestone.