Non-Kolmogorov spectrum scintillation aspects of dark hollow and flat topped beams

被引:11
作者
Eyyuboglu, Halil T. [1 ]
Cai, Yangjian [2 ]
机构
[1] Cankaya Univ, Dept Elect & Commun Engn, Ankara, Turkey
[2] Soochow Univ, Sch Phys Sci & Technol, Suzhou 215006, Peoples R China
基金
中国国家自然科学基金;
关键词
Non-Kolmogorov power spectrum; DH and FT beams; Scintillation; SCHELL MODEL BEAM; TURBULENT ATMOSPHERE; GAUSSIAN BEAMS;
D O I
10.1016/j.optcom.2011.11.095
中图分类号
O43 [光学];
学科分类号
070207 ; 0803 ;
摘要
The scintillation aspects of dark hollow (DH) and fiat topped (FT) beams propagating in the turbulent atmosphere containing the non-Kolmogorov power spectrum are investigated. It is found that low scintillations will occur when the exponent of the power spectrum is just above the numeric value of 3. Initially, the rises in scintillations will take place as the exponent becomes larger, but later the scintillation reductions will be experienced as the exponent grows further, eventually minimum scintillations will be seen when the exponent has reached the value of 4. This will be the case, for scintillation variations against propagation distance, source size, wavelength, inner and outer scales of turbulence. Furthermore, it is found that at the small source sizes, DH beams will offer less scintillation than FT beams, while at the large source sizes, the reverse will be applicable. (C) 2011 Elsevier B.V. All rights reserved.
引用
收藏
页码:969 / 974
页数:6
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