大气与环境光学学报 ›› 2011, Vol. 6 ›› Issue (3): 231-234.

• 光电技术 • 上一篇    下一篇

大气湍流模拟装置性能测试

申永1,2,刘建国1,曾宗泳1,徐亮1   

  1. (1中国科学院安徽光学精密机械研究所中国科学院环境光学与技术重点实验室, 安徽 合肥 230031; 
    2 中国科学院研究生院, 北京 100039)
  • 收稿日期:2010-05-04 修回日期:2010-06-25 出版日期:2011-05-28 发布日期:2011-05-23
  • 通讯作者: 申永(1985-),男,湖南隆回县人,研究生,从事环境监测精密仪器研究。 E-mail:yshen@aiofm.ac.cn
  • 作者简介:申永(1985-),男,湖南隆回县人,研究生,从事环境监测精密仪器研究。
  • 基金资助:

    合肥研究院知识创新工程青年人才领域前沿项目(083RC11121)资助

Performance Testing of Atmospheric Turbulence Simulator

SHEN Yong1,2, LIU Jian-guo1,ZENG Zong-yong1,XU Liang1   

  1. (1 Key Laboratory of Environment Optics and Technology, Anhui Institute of Optics and Fine Mechanics, Chinese Academy of Science,Hefei 230031,China; 
    2 Graduate University of Chinese Academy of Science ,Beijing 100039,China)
  • Received:2010-05-04 Revised:2010-06-25 Published:2011-05-28 Online:2011-05-23

摘要:

利用光传输实验的大气湍流模拟装置测量了光传输特性。实验中采用了到达角起伏和光强闪烁两种方法来测试光传输特性。测试结果表明,温差1~200 ℃时,Fried相干长度为0.7~40 cm;温差200℃时,到达角起伏谱频率范围达到100 Hz;光强闪烁强度频率可达100 Hz,湍流特征速度约0.1 m/s,,外尺度约20 cm。湍流模拟装置所测的性能指标和实际大气湍流性能较为接近,并且湍流强度具有较好的稳定性和可控性,能满足光传输实验要求。

关键词: 大气湍流, 光强闪烁, 相干长度, 到达角起伏, 外尺度

Abstract:

Using the atmospheric turbulence simulator used in optical transmission experiments, characteristics of optical transmission are measured. Two methods such as the fluctuation of beam’s arrival angle and the intensity of beam’s scintillation are used to measure the characteristics in the experiment . Results show that, the range of Fried coherence length is 0.7~40 cm when the difference in temperature is 1~200 ℃, and the frequency of arrival angle fluctuation spectrum ranges can be up to100 Hz when the difference in temperature is 200 ℃. The scintillation intensity frequency is up to 100 Hz, feature speed of turbulence is about 0.1 m/s, and the outer scale is about 20 cm. All the tested performances of turbulence simulator are relatively close to the actual atmospheric turbulence’s performance, and the turbulence intensity also has good stability and controllability. So both of them can satisfy the needs of optical transmission experiments.

Key words: atmospheric turbulence, scintillation of beam, coherence length, arrival angle fluctuation, outer scale

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