Statistical models for intensity and phase fluctuation of laser light in a turbulent medium

The probability density function of irradiance fluctuations in a turbulent atmosphere remains an open topic of research. It is generally considered that the speckle field has an elliptical-Gaussian speckle distribution, but because of its complexity there is still no exact analytical solution. By in...

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Bibliographic Details
Published in:Chinese science bulletin 2011-05, Vol.56 (15), p.1539-1542
Main Authors: Wang, HongXing, Liu, Min, Wang, Qian, Zhang, TieYing, Liu, XiGuo
Format: Article
Language:English
Subjects:
Chemistry/Food Science
Earth Sciences
Engineering
Humanities and Social Sciences
lasers
Life Sciences
light intensity
mathematical models
multidisciplinary
Physics
probability
Science
Science (multidisciplinary)
statistical models
概率密度函数
波动强度
湍流介质
激光
相位波动
统计模型
随机波动
高斯近似
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Summary:The probability density function of irradiance fluctuations in a turbulent atmosphere remains an open topic of research. It is generally considered that the speckle field has an elliptical-Gaussian speckle distribution, but because of its complexity there is still no exact analytical solution. By introducing the concept of random fluctuation intensity and using an equiprobability density ellipse, exact models of the random fluctuation intensity and its phase are proposed. Through theoretical analysis and numerical simulation, it is concluded that the random fluctuation intensity and its corresponding phase are independent only under the circular-Gaussian approximation.
ISSN:1001-6538
1861-9541
DOI:10.1007/s11434-011-4448-5