中国物理B ›› 2012, Vol. 21 ›› Issue (9): 94202-094202.doi: 10.1088/1674-1056/21/9/094202

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

Long-distance propagation of pseudo-partially coherent Gaussian Schell-model beams in atmospheric turbulence

钱仙妹, 朱文越, 饶瑞中   

  1. Key Laboratory of Atmospheric Composition and Optical Radiation of Chinese Academy of Sciences, Anhui Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Hefei 230031, China
  • 收稿日期:2011-11-23 修回日期:2012-02-12 出版日期:2012-08-01 发布日期:2012-08-01
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant Nos. 61107066 and 40805006).

Long-distance propagation of pseudo-partially coherent Gaussian Schell-model beams in atmospheric turbulence

Qian Xian-Mei (钱仙妹), Zhu Wen-Yue (朱文越), Rao Rui-Zhong (饶瑞中)   

  1. Key Laboratory of Atmospheric Composition and Optical Radiation of Chinese Academy of Sciences, Anhui Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Hefei 230031, China
  • Received:2011-11-23 Revised:2012-02-12 Online:2012-08-01 Published:2012-08-01
  • Contact: Qian Xian-Mei E-mail:qianxianmei@aiofm.ac.cn
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant Nos. 61107066 and 40805006).

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摘要： Propagation properties of spatially pseudo-partially coherent Gaussian Schell-model beams through the atmospheric turbulence over a long-distance uplink path are studied by numerical simulation. A linear coordination transformation is introduced to overcome the window effect and the loss-of-resolution problem. The beam spreading, beam wandering, and intensity scintillation as functions of turbulence strength, source correlation length, and change frequency of random phase that models the partial coherence of the source are analyzed. It is found that the beam spreading and the intensity scintillation of the partially coherent beam are less affected by the turbulence than those of the coherent one, but it suffers from severer diffractive effect, and the change frequency of random phase has no evident influence on it. The beam wandering is insensitive to the variation of source correlation length, and decreases firstly then goes to a fixed value as the change frequency increases.

关键词: long-distance propagation, pseudo-partially coherent Gaussian Schell-model beam, atmospheric turbulence, numerical simulation

Abstract: Propagation properties of spatially pseudo-partially coherent Gaussian Schell-model beams through the atmospheric turbulence over a long-distance uplink path are studied by numerical simulation. A linear coordination transformation is introduced to overcome the window effect and the loss-of-resolution problem. The beam spreading, beam wandering, and intensity scintillation as functions of turbulence strength, source correlation length, and change frequency of random phase that models the partial coherence of the source are analyzed. It is found that the beam spreading and the intensity scintillation of the partially coherent beam are less affected by the turbulence than those of the coherent one, but it suffers from severer diffractive effect, and the change frequency of random phase has no evident influence on it. The beam wandering is insensitive to the variation of source correlation length, and decreases firstly then goes to a fixed value as the change frequency increases.

Key words: long-distance propagation, pseudo-partially coherent Gaussian Schell-model beam, atmospheric turbulence, numerical simulation

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

  • 42.25.Bs
42.25.Kb (Coherence) 92.60.Ta (Electromagnetic wave propagation) 92.60.hk (Convection, turbulence, and diffusion)