A modified light diffusion solution model was proposed from a heuristic version of beam spreading (BS) model and diffusion approximation (DA) theory.
受到光束扩散模型和漫射近似理论的启发，提出了一种改进的光传输求解模型。
The influence of atmospheric turbulence on the relative beam width spreading is larger for PCFT beam array with larger beam order and smaller coherence length.
光束阶数越大、相干长度越小，部分相干平顶光束序列的相对束腰宽度扩散较快；
The expression of optical-beam wander is obtained from above long-term optical-beam spreading formula and the MA.
应用上面长期光束扩展半径表达式和马尔可夫近似获得了光束漂移表达式。
The results show that the obscuring ratio has obvious influence on the beam spreading in weak turbulence.
结果表明，对于均强聚焦光束湍流大气传输，在弱湍流效应条件下，光斑扩展受遮拦比影响较大；
In this paper, numerical method was used to quantitatively calculate the limited uniform-intensity focused beam spreading induced by atmospheric turbulence.
利用数值模拟方法讨论了发射系统遮拦比对均强聚焦光束湍流大气传输光斑扩展的影响。
The influence of turbulence on beam spreading of the spatially partially coherent polychromatic light is smaller than that of spatially fully coherent polychromatic light.
多色部分空间相干光光束扩展比多色完全空间相干光受湍流的影响小。
But when turbulence is strong, this influence can be neglected and the beam spreading is mainly determined by the intensity of turbulence effects.
在较强湍流效应条件下，不同遮拦比光斑扩展变化趋势相同。此时远场光斑扩展主要还是受湍流效应强弱的影响。
The transmission beam, starting with a single dot (to represent the user), shows their ideas spreading out.
无线电波，始发于一个“点”(代表用户)，体现他们的理念在传播。
It is shown that the atmospheric turbulence gives rise to spectral shift and to beam spreading of spatially partially coherent polychromatic light whether the scaling law is satisfied or not.
结果表明，无论是否满足定标律，大气湍流会引起多色部分空间相干光的光谱移动和光束扩展；多色部分空间相干光光束扩展比多色完全空间相干光受湍流的影响小。
Moreover, the scaling relation between the beam spreading and the characteristic parameter described turbulence effects is derived.
获得了常用遮拦比条件下均强聚焦光束光斑扩展和湍流效应特征参数的定标关系。
The mean-square width and the equivalent-beam width are put forward to investigate the spreading of vortex beam while propagating.
提出了均方根光斑尺寸以及等效光斑尺寸的定义，并分别采用这两种定义对涡旋光束的光斑展宽进行了分析。
The mean-square width and the equivalent-beam width are put forward to investigate the spreading of vortex beam while propagating.
提出了均方根光斑尺寸以及等效光斑尺寸的定义，并分别采用这两种定义对涡旋光束的光斑展宽进行了分析。
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