采用光传播数值模拟的方法，研究了长脉冲、短脉冲和连续波圆偏振激光传播至钠层并激发钠信标回波光子的分布及变化情况，并比较了Greenwood和Hufnagel-valley5/7（HV5/7）两种大气湍流模式下回波光子在钠层的分布及光子数的差异。结果表明相对于Greenwood湍流模式，长脉冲、短脉冲和连续波圆偏振激光在HV5/7湍流模式下传播至钠层的光强分布分散性增强且光强分布的峰值受到削弱；长脉冲和连续波激光与钠层作用可激发更多的回波光子，但是短脉冲激光却不能激发更多的回波光子。而且在两种湍流模式下短脉冲和连续波激光激发的光子数分布与光强分布具有很好的一致性，而长脉冲激光激发的光子数分布却没有这种特点。

For laser of the long pulses, short pulses and continuous wave with circular polarization, the effect of atmospheric turbulence on the return photons number of sodium laser beacon is studied by numerical simulation method of light propagation under the Greenwood and Hufnagel-valley5/7 (HV5/7) model for atmospheric turbulence. Results indicate that compared with Greenwood model under the HV4/7 model, the atmospheric turbulence causes the further dispersive distribution of laser intensity in the mesosphere and the reduced peak intensity, and return photons number is increased for laser of long pulses and continuous wave with circular polarization. However, the circularly-polarized short pulses cannot get more return photons under the HV5/7 model for atmospheric turbulence. Furthermore, the distribution of photons number exited by the circularly-polarized short pulses and continuous-wave laser is in an agreement with the distribution of laser intensity, but the long pulses are in absence of this character.