M 2-factors of a non-circular partially coherent flat-topped beam

被引：6
|
作者：
Ding, J. [1 ]
Cheng, F. [1 ]
Cai, Y. [1 ]
机构：
[1] Soochow Univ, Sch Phys Sci & Technol, Suzhou 215006, Peoples R China
来源：
APPLIED PHYSICS B-LASERS AND OPTICS | 2011年 / 102卷 / 03期
基金：
中国国家自然科学基金;
关键词：
FLATTENED GAUSSIAN-BEAM; FRACTIONAL FOURIER-TRANSFORM; SCHELL-MODEL BEAMS; PROPAGATION FACTOR; CIRCULAR APERTURE; LIGHT-BEAMS; 2ND-HARMONIC GENERATION; ATMOSPHERIC-TURBULENCE; PARAXIAL PROPAGATION; RADIATION FORCE;
D O I：
10.1007/s00340-010-4116-5
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
Based on the extended Huygens-Fresnel integral and the second-order moments of the Wigner distribution function, analytical formulae for the propagation factors (known as M (2)-factors) of a non-circular (i.e., rectangular or elliptical) partially coherent flat-topped beam in turbulent atmosphere are derived. The properties of the M (2)-factors of a non-circular partially coherent flat-topped beam in turbulent atmosphere and in free space are studied numerically and comparatively. It is found that the evolution properties of the M (2)-factors are mainly determined by the parameters of the beam and the turbulent atmosphere. The relative M (2)-factors of a non-circular partially coherent flat-topped beam can be smaller than a circular partially coherent flat-topped beam and a Gaussian Schell-model beam, particularly at long propagation ranges in turbulent atmosphere. Our results will be useful in long-distance free-space optical communications.
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页码：673 / 687
页数：15
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