摘要
研究了修正贝塞尔高斯谢尔(MBGS)光束在柯尔莫哥诺夫湍流模型下的演变特性,推导了MBGS光束在源平面场的表达式,在此基础上利用广义惠更斯-菲涅尔积分原理获得任意阶修正贝塞尔高斯谢尔光束在经过湍流大气后的平均光强解析表达式.数值计算和分析表明:相关宽度对MBGS光束在湍流大气中的演变特性具有重要影响,增大相关宽度减缓了修正贝塞尔高斯谢尔光束演变为高斯光束的进程,增大了光束经过湍流大气后接收平面的光强.相比于高阶MBGS光束,低阶MBGS光束在湍流大气中传播后能够获得更大的归一化平均光强,但在传播过程中比高阶MBGS光束更早演变为高斯光束.MBGS光束在湍流大气中传播时,相关宽度优化选取后的低阶、短波长MBGS光束具备更强的抗干扰性.
The propagation characteristics of modified Bessel-Gaussian Schell-model(MBGS)beams traveling in the Kolmogorov turbulent atmosphere were investigated in this paper.The MBGS beams at the source plane were formulated.Based on this formulation and the extended Huygens-Fresnel principle,the receiver plane intensity of an arbitrary-order MBGS beam through turbulent atmosphere was obtained.Numerical results reveal that the correlation width has an important influence on the evolution properties of MBGS beams propagating in the atmosphere.The MBGS beams with the large correlation width have a slow evolving process into Gaussian beams and large intensity.Furthermore,the low-order MBGS beams have a large intensity at the receiving plane after propagating in the turbulent atmosphere,but they evolve into Gaussian beams earlier than the higher-order MBGS beams.We find that MBGS beams with short wavelength,low-order,by appropriately selecting the correlation width,are more robust.While propagating in the turbulent atmosphere,they have a large intensity at the receiving plane.
作者
王瑾
曾福江
李杏梅
梁晴晴
WANG Jin;ZENG Fujiang;LI Xingmei;LIANG Qingqing(School of Mechanical Engineering and Electronic Information,China University of Geoscience,Wuhan 430074,China)
出处
《华中科技大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2019年第3期109-114,共6页
Journal of Huazhong University of Science and Technology(Natural Science Edition)
基金
高等学校博士学科点专项科研基金资助项目(20120145120011)
