Abstract

The scintillation index is formulated for a flat-topped Gaussian beam source in atmospheric turbulence. The variations of the on-axis scintillations at the receiver plane are evaluated versus the link length, the size of the flat-topped Gaussian source, and the wavelength at selected flatness scales. The existing source model that represents the flat-topped Gaussian source as the superposition of Gaussian beams is employed. In the limiting case our solution correctly matches with the known Gaussian beam scintillation index. Our results show that for flat-topped Gaussian beams scintillation is larger than that of the single Gaussian beam scintillation when the source sizes are much smaller than the Fresnel zone. However, this trend is reversed and scintillations become smaller than the Gaussian beam scintillations for flat-topped sources with sizes much larger than the Fresnel zone.

© 2006 Optical Society of America

Scintillation index of flat-topped Gaussian laser beam in strongly turbulent medium

Hamza Gerçekcioğlu and Yahya Baykal
J. Opt. Soc. Am. A 28(8) 1540-1544 (2011)

Scintillations of incoherent flat-topped Gaussian source field in turbulence

Yahya Baykal and Halil T. Eyyuboǧlu
Appl. Opt. 46(22) 5044-5050 (2007)

Scintillations of partially coherent multiple Gaussian beams in turbulence

Yahya Baykal, Halil T. Eyyuboğlu, and Yangjian Cai
Appl. Opt. 48(10) 1943-1954 (2009)

Inner scale effect on scintillation index of flat-topped beam in non-Kolmogorov weak turbulence

Zhihong Zeng, Xiujuan Luo, Aili Xia, Yu Zhang, and Bei Cao
Appl. Opt. 54(10) 2630-2638 (2015)

Scintillation characteristics of cosh-Gaussian beams

Halil T. Eyyuboglu and Yahya Baykal
Appl. Opt. 46(7) 1099-1106 (2007)