Scintillation in turbulent atmosphere laser communication

XU Chun-feng; NI Xiao-long; LIU Zhi

doi:10.3788/OPE.20162413.0183

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Scintillation in turbulent atmosphere laser communication

更新时间：2020-08-13

- Scintillation in turbulent atmosphere laser communication
- Optics and Precision Engineering Vol. 24, Issue 10s, Pages: 183-189(2016)
- 作者机构：
  
  1. 长春理工大学光电工程学院,吉林长春,130022
  2. 长春理工大学空地激光通信技术国防重点学科实验室,吉林长春,130022
- 作者简介：
- 基金信息：
- DOI：10.3788/OPE.20162413.0183
  CLC： TN929.12
- Received：04 June 2016，
  
  Revised：10 July 2016，
  
  Published：14 November 2016
- 稿件说明：
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徐春凤, 倪小龙, 刘智. 激光大气湍流传输中的光强闪烁特性[J]. 光学精密工程, 2016,24(10s): 183-189

XU Chun-feng, NI Xiao-long, LIU Zhi. Scintillation in turbulent atmosphere laser communication[J]. Editorial Office of Optics and Precision Engineering, 2016,24(10s): 183-189
徐春凤, 倪小龙, 刘智. 激光大气湍流传输中的光强闪烁特性[J]. 光学精密工程, 2016,24(10s): 183-189 DOI： 10.3788/OPE.20162413.0183.

XU Chun-feng, NI Xiao-long, LIU Zhi. Scintillation in turbulent atmosphere laser communication[J]. Editorial Office of Optics and Precision Engineering, 2016,24(10s): 183-189 DOI： 10.3788/OPE.20162413.0183.

摘要

利用激光大气通信系统进行了近地面激光大气传输实验，对不同季节、不同波长下的闪烁因子进行了观测。实验时间均为每天的8点~21点，每隔10分钟测量一次，单次测量采集15 000幅灰度图像进行处理和分析，选取规律较好的日样本进行对比分析。实验结果表明：闪烁因子随着气温的升高、湍流效应的增强而增加，随着气温的降低、湍流效应的减弱而减小；闪烁因子随着波长的增加而减小，并且波长越长，稳定性越好。实测闪烁因子值与理论上的Rytov方差基本吻合，验证了Rytov方差在弱起伏条件下的适用性；从统计数据分布的规律中得出光强闪烁概率密度函数服从正态分布。光强起伏功率谱幂指数在-7/3~-12/3之间波动，低于其它文献中给出的实验结果。所得的结果对大气信道的激光通信研究具有一定的借鉴作用。

Abstract

The laser atmosphere communication system was employed to carry out near-surface laser atmosphere transmission experiments for observation of scintillation indexes of different seasons and different wavelengths. The measurements were performed every 10 minutes in a period from 8 am to 21 pm. Each time collected 15000 gray level images for processing and analysis

where the daily samples in good regularity were selected for comparison. Experimental result shows that scintillation index increases with the increases of temperature and turbulence effect

but decreases with the decreases of temperature and turbulence effect. In addition

the index decreases with the increases of wavelength. The longer the wavelength is

the better stability will be. The measured scintillation index is basically equal to theoretical Rytov variance

which verifies the feasibility of Rytov variance under weak fluctuation condition. It can be concluded that the scintillation probability density function of light intensity conforms to normal distribution according to the statistical data distribution. The exponents of light intensity fluctuation power spectrum vary in the range of -7/3 to -12/3

being lower than experimental results given in other documents. The results can be a reference for the further research of satellite-ground laser communication.

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references

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