非科尔莫戈罗夫湍流情况下光学波前的到达角起伏方差分析

引入非科尔莫戈罗夫 (Kolmogorov)湍流情况下的归一化相位空间功率谱 ,针对 G倾斜和Z倾斜两种情形 ,分别推导了非科尔莫戈罗夫湍流情况下光学波前的到达角起伏方差与相位空间功率谱指数下降因子β和归一化大气湍流相干长度ρ0 之间的关系。结果表明 ,对于 2 <β <4 ,非科尔莫戈罗夫湍流情况下光学波前的到达角起伏方差随着β的增加而增大 ,β相同时 ,G倾斜方差总是小于 Z倾斜方差。

Analysis of Arrival-of-Angle Fluctuations of Optical Wavefront for Non-Kolmogorov Turbulence

For Z-tilt and G-tilt, the variances of the arrival-of-angle fluctuations of optical wavefront, which are functions of the power-law exponent β and the generalized coherence length ρ0, are deduced by introducing the generalized phase spatial power spectrum for non-Kolmogorov turbulence respectively. The results show that for 2<β<4, the variances of the arrival-of-angle fluctuations of optical wavefront become larger and larger with the increasing of the power-law exponent β and the variance of G-tilt is smaller than that of Z-tilt for the same β.