|
文摘
|
采用多层相位屏的数值模拟方法,定量研究了几种典型像差对聚焦高斯光束在湍流大气中传输的轴闪烁特性的影响。研究结果表明,像散和慧差像差对远场光斑的轴闪烁分别具有较强的抑制和促进作用,较强的慧差和像散能分别提前和延后光斑轴闪烁饱和的出现。湍流较弱时的聚焦高斯光束大气传输光强起伏概率严重,湍流越强,光强起伏概率越接近于对数正态分布,且基本满足偏斜度为负,陡峭度为正。弱、中等湍流强度下,像差权重较大时,光强起伏概率分布主要受像差影响;像差权重系数较小时,光强起伏概率分布主要受湍流效应的影响,且各像差主要影响光强较弱区域的起伏分布情况。强湍流强度下,湍流效应对光强起伏概率分布占主要作用,趋近于对数正态分布。 |
|
其他语种文摘
|
Based multi-phase screen numerical simulation,the influences of on-axis scintillation of focus Gaussian beams propagating in the turbulent atmosphere on several typical aberrations are investigated quantitatively.It is found that astigmatism and coma aberrations can restrain and promote the axis-scintillation to some extent, respectively.Stronger coma and astigmatism aberrations can forward and delay the appearance of scintillation saturation,respectively.The distribution of intensity deviates from log-normal distribution when turbulence strength is weaker.It is close to log-normal distribution when the intensity of turbulence rises.The skewness of the intensity distribution is less than zero and its kurtosis is greater than zero basically.Under weak or moderate turbulence intensity,the distribution of intensity fluctuation is always determined by aberrations when the aberration is big enough,however,the effects of turbulence play the main role on the distribution of intensity fluctuation and the aberrations mainly affect the fluctuation distributions of weak intensity areas when the weight of aberration is small.The strong turbulence influences the probability distribution of intensity fluctuation mostly,and the distribution fits to log-normal distribution approximately. |
|
来源
|
光学学报
,2017,37(11):1101001-1-1101001-10 【核心库】
|
|
DOI
|
10.3788/AOS201737.1101001
|
|
关键词
|
大气光学
;
激光传输
;
轴闪烁
;
数值模拟
;
像差
;
湍流大气
|
|
地址
|
1.
中国科学院安徽光学精密机械研究所, 中国科学院大气光学重点实验室, 安徽, 合肥, 230031
2.
光电对抗测试评估技术重点实验室, 河南, 洛阳, 471003
|
|
语种
|
中文 |
|
文献类型
|
研究性论文 |
|
ISSN
|
0253-2239 |
|
学科
|
物理学 |
|
基金
|
光电对抗测试评估技术重点实验室开放课题
|
|
文献收藏号
|
CSCD:6122544
|
了解气象卫星更多信息，请访问