M2-factor of a truncated electromagnetic Gaussian Schell-model beam

被引:0
作者
S. Zhu
Y. Cai
机构
[1] Soochow University,School of Physical Science and Technology
来源
Applied Physics B | 2011年 / 103卷
关键词
Laser Beam; Turbulent Atmosphere; Evolution Property; Source Plane; Coherent Beam;
D O I
暂无
中图分类号
学科分类号
摘要
Based on the extended Huygens–Fresnel integral and the second-order moments of the Wigner distribution function, analytical expression for the M2-factor of a truncated electromagnetic Gaussian Schell-model (EGSM) beam in turbulent atmosphere is derived by expanding the hard-aperture function into a finite sum of complex Gaussian functions. It is found that the evolution properties of the normalized M2-factor of a truncated EGSM beam are closely determined by the truncation parameter, the parameters of the source beam and the parameters of the turbulent atmosphere together. The advantage of the EGSM beam for overcoming the turbulence-induced degradation disappears gradually as the truncation parameter decreases.
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页码:971 / 984
页数:13
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