中国物理B ›› 2018, Vol. 27 ›› Issue (3): 34201-034201.doi: 10.1088/1674-1056/27/3/034201

• ELECTROMAGNETISM, OPTICS, ACOUSTICS, HEAT TRANSFER, CLASSICAL MECHANICS, AND FLUID DYNAMICS • 上一篇    下一篇

Further analysis of scintillation index for a laser beam propagating through moderate-to-strong non-Kolmogorov turbulence based on generalized effective atmospheric spectral model

Jing Ma(马晶), Yu-Long Fu(付玉龙), Si-Yuan Yu(于思源), Xiao-Long Xie(谢小龙), Li-Ying Tan(谭立英)   

  1. National Key Laboratory of Tunable Laser Technology, Harbin Institute of Technology, Harbin 150001, China
  • 收稿日期:2017-09-29 修回日期:2017-11-30 出版日期:2018-03-05 发布日期:2018-03-05
  • 通讯作者: Yu-Long Fu E-mail:fuyulongm@163.com

Further analysis of scintillation index for a laser beam propagating through moderate-to-strong non-Kolmogorov turbulence based on generalized effective atmospheric spectral model

Jing Ma(马晶), Yu-Long Fu(付玉龙), Si-Yuan Yu(于思源), Xiao-Long Xie(谢小龙), Li-Ying Tan(谭立英)   

  1. National Key Laboratory of Tunable Laser Technology, Harbin Institute of Technology, Harbin 150001, China
  • Received:2017-09-29 Revised:2017-11-30 Online:2018-03-05 Published:2018-03-05
  • Contact: Yu-Long Fu E-mail:fuyulongm@163.com

摘要: A new expression of the scintillation index (SI) for a Gaussian-beam wave propagating through moderate-to-strong non-Kolmogorov turbulence is derived, using a generalized effective atmospheric spectrum and the extended Rytov approximation theory. Finite inner and outer scale parameters and high wave number “bump” are considered in the spectrum with a generalized spectral power law in the range of 3-4, instead of the fixed classical Kolmogorov power law of 11/3. The obtained SI expression is then used to analyze the effects of the spectral power law and the inner scale and outer scale on SI under various non-Kolmogorov fluctuation conditions. These results will be useful in future investigations of optical wave propagation through atmospheric turbulence.

关键词: atmospheric optics, non-Kolmogorov turbulence, scintillation index, Gaussian-beam wave

Abstract: A new expression of the scintillation index (SI) for a Gaussian-beam wave propagating through moderate-to-strong non-Kolmogorov turbulence is derived, using a generalized effective atmospheric spectrum and the extended Rytov approximation theory. Finite inner and outer scale parameters and high wave number “bump” are considered in the spectrum with a generalized spectral power law in the range of 3-4, instead of the fixed classical Kolmogorov power law of 11/3. The obtained SI expression is then used to analyze the effects of the spectral power law and the inner scale and outer scale on SI under various non-Kolmogorov fluctuation conditions. These results will be useful in future investigations of optical wave propagation through atmospheric turbulence.

Key words: atmospheric optics, non-Kolmogorov turbulence, scintillation index, Gaussian-beam wave

中图分类号:  (Wave propagation, transmission and absorption)

  • 42.25.Bs
42.25.Dd (Wave propagation in random media) 42.68.Bz (Atmospheric turbulence effects) 42.68.Ay (Propagation, transmission, attenuation, and radiative transfer)