摘要
采用弱湍流大气光传输的Rytov近似和运用非衍射光束的平面波展开原理,研究并给出了弱湍流大气中Mathieu-Gauss束的场方程和平均光强解析表达式。研究表明:弱湍流大气中传输Mathieu-Gauss束由传输距离z函数的复振幅、高斯束包络、湍流引入的复相位和复标定横向非衍射束型四个因子构成,其归一化轴上平均光强随归一化距离z=z/zR和参量γ=12kρw0的变化与此类光束在自由空间传输的规律相同。
On the Rytov approximation of light propagation in weak turbulent atmosphere and the fact that nondiffracting beams can be expanded in terms of plane waves, we present the propagation characterization of Mathieu-Gauss beams. The expression of Mathieu-Gauss beams which are propagation in weak turbulent atmosphere can be written as the product of four factors： a complex amplitude depending on the z coordinate only, a Gaussian beam, a factor of complex phase induced by atmospheric turbulence, and a complex scaled version of the transverse shape of the nondiffracting beam. The normalized axial irradiance distribution of Mathieu-Gauss beams as a function of the normalized propa- 1 gation distance z=z/zR and the parameter γ=1/2kpwo which is propagation in atmospheric turbulence is same as that of this beams propagation in flee space.
出处
《激光与红外》
CAS
CSCD
北大核心
2008年第2期112-114,121,共4页
Laser & Infrared
