Title :
Study of scintillation for a Gaussian beam propagating in atmospheric turbulence on Earth-space paths
Author :
Yang, RuiKe ; Wu, Zhensen ; Chen, Hui ; Guo, Lixin
Author_Institution :
Sci. Sch., Xidian Univ., Xi´´an, China
Abstract :
On Earth-space paths, by applying a modification of the Rytov method that incorporates a spatial frequency filter function under strong fluctuation conditions, a model for the scintillation index of a Gaussian laser beam wave that is valid under moderate-to-strong irradiance fluctuations is developed. The scintillation indexes for a collimation Gaussian beam are predicted by using this analytic model, based on the ITU-R Cn2 model. The results agree with theoretic expected scintillation. This scintillation model can be converted into a plane or a sphere wave scintillation index model on Earth-space paths, and also reduced to a Gaussian beam wave model on horizontal sight paths of invariable Cn2.
Keywords :
Gaussian distribution; atmospheric light propagation; atmospheric turbulence; fluctuations; scintillation; spatial filters; Earth-space propagation paths; Gaussian beam scintillation; Rytov method; atmospheric turbulence laser beam propagation; collimation Gaussian beam; horizontal sight paths; irradiance fluctuations; optical turbulence; plane/sphere wave scintillation index; scintillation index model; spatial frequency filter function; strong fluctuation conditions; Atmospheric modeling; Atmospheric waves; Filters; Fluctuations; Frequency; Laser beams; Laser modes; Laser theory; Optical propagation; Predictive models;
Conference_Titel :
Radio Science Conference, 2004. Proceedings. 2004 Asia-Pacific
Print_ISBN :
0-7803-8404-0
DOI :
10.1109/APRASC.2004.1422474