基于非Kolmogorov湍流谱理论,建立了激光在非Kolmogorov谱湍流大气中 传输的数学物理模型,并在此基础上进行了数值仿真。结果表明湍流谱指数对激光传输特性及其相位补偿有重要影响。 在相同广义大气折射率结构常数条件下,湍流谱指数接近区间(3,4)两端时,激光远场光束质量较好;湍流谱指数趋向4时 自适应光学相位补偿效果较好。在广义大气相干长度相同的条件下,峰值Strehl比随湍流谱指数增加而增加。 针对归一化功率谱下激光传输特性进行了探讨,初步揭示了激光在非Kolmogorov湍流大气中的传输机理。

Based on the theory of non-Kolmogorov turbulence spectrum, the mathematics and physics model of laser propagation in non-Kolmogorov spectrum turbulence atmosphere is established, and numerical simulation is carried out based on the model. Results show that the turbulence spectral index has important effects on the laser propagation characteristics and its phase compensation. Under the condition of the same generalized atmospheric refractive index structure constant, the laser beam quality of far-field is better when turbulence spectral index is close to both ends of the interval (3,4). When turbulence spectral index is nearly to 4, the effect of adaptive optics compensation is better. Under the condition of the same generalized atmospheric coherence length, the peak Strehl ratio increases with the increase of turbulence spectral index. The laser propagation characteristics under normalization power spectrum are discussed, and the propagation mechanism of laser in non-Kolmogorov turbulence atmosphere is preliminary revealed.