›› 2014, Vol. 23 ›› Issue (9): 99502-099502.doi: 10.1088/1674-1056/23/9/099502

• GEOPHYSICS, ASTRONOMY, AND ASTROPHYSICS • 上一篇    

Scintillation characterization for multiple incoherent uplink Gaussian beams

吴武明, 宁禹, 马阎星, 习锋杰, 许晓军   

  1. College of Optoelectric Science and Engineering, National University of Defense Technology, Changsha 410073, China
  • 收稿日期:2014-01-21 修回日期:2014-03-28 出版日期:2014-09-15 发布日期:2014-09-15
  • 基金资助:
    Project supported by the Open Research Fund of Key Laboratory of Atmospheric Composition and Optical Radiation, Chinese Academy of Sciences (Grant No. 2012JJ05).

Scintillation characterization for multiple incoherent uplink Gaussian beams

Wu Wu-Ming (吴武明), Ning Yu (宁禹), Ma Yan-Xing (马阎星), Xi Fen-Jie (习锋杰), Xu Xiao-Jun (许晓军)   

  1. College of Optoelectric Science and Engineering, National University of Defense Technology, Changsha 410073, China
  • Received:2014-01-21 Revised:2014-03-28 Online:2014-09-15 Published:2014-09-15
  • Contact: Wu Wu-Ming E-mail:treewwm@126.com
  • Supported by:
    Project supported by the Open Research Fund of Key Laboratory of Atmospheric Composition and Optical Radiation, Chinese Academy of Sciences (Grant No. 2012JJ05).

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摘要： By means of numerical simulations, we analyze the scintillation characterization for multiple incoherent uplink Gaussian beams under weak fluctuations cases. Because truly independent beams are difficult to create, we present a more general but approximate model for the multiple of beams traveling through partially correlated paths. This model compares with wave-optics simulations and highlights the reduced correlation coefficient as the beam separation is increased. The scintillation index of three and six incoherent uplink Gaussian beams is also induced. The result shows that the scintillation index decreases with the increase of beams amount and beam separation. When the beams amount and strength of atmospheric turbulence are fixed, the reduction of scintillation index is affected by the ratio of beams separation and the Fried length. The corresponding physical mechanisms for the results are discussed.

关键词: scintillation characterization, uplink beams, correlation coefficient, beam separation

Abstract: By means of numerical simulations, we analyze the scintillation characterization for multiple incoherent uplink Gaussian beams under weak fluctuations cases. Because truly independent beams are difficult to create, we present a more general but approximate model for the multiple of beams traveling through partially correlated paths. This model compares with wave-optics simulations and highlights the reduced correlation coefficient as the beam separation is increased. The scintillation index of three and six incoherent uplink Gaussian beams is also induced. The result shows that the scintillation index decreases with the increase of beams amount and beam separation. When the beams amount and strength of atmospheric turbulence are fixed, the reduction of scintillation index is affected by the ratio of beams separation and the Fried length. The corresponding physical mechanisms for the results are discussed.

Key words: scintillation characterization, uplink beams, correlation coefficient, beam separation

中图分类号:  (Adaptive and segmented optics)

  • 95.75.Qr
96.50.Tf (MHD waves; plasma waves, turbulence)