复宗量厄米双曲余弦高斯光束在湍流大气中的传输特性  

Propagation Properties of Elegant Hermite-Coch-Gaussian Beams in a Turbulent Atmosphere

作　　者：刘永欣[1] 蒲继雄[1] 陈子阳[1] 王涛[1] 

机构地区：[1]华侨大学信息科学与工程学院,福建泉州362021

出　　处：《华侨大学学报（自然科学版）》2011年第2期145-149,共5页Journal of Huaqiao University(Natural Science)

基　　金：福建省科技计划重点项目(2007H0027);福建省自然科学基金资助项目(A0810012);华侨大学科研基金资助项目(07HZR29)

摘　　要：根据广义的惠更斯-菲涅耳原理,推导了复宗量厄米双曲余弦高斯(EHChG)光束在湍流大气中传输时光强分布的理论公式,并研究光束在湍流大气中的传输变化规律.研究发现,EHChG光束在湍流大气中传输时,光强分布均趋于高斯分布.在湍流大气的影响下,EHChG光束由完全相干光变成部分相干光,并且随着传输距离和湍流强度的增加,光束的空间相干性变差.研究还发现,光束的桶中功率与湍流大气的强度、传输距离及光束参数m,n有关.Based on the extended Huygens-Fresnel principle,the theoretical formula of the optical intensity distribution for an Elegant Hermite-cosh-Gaussian（EHChG） beams which propagate in a turbulent atmosphere has been derived,and then the propagation properties of such beam in the turbulent atmosphere have been investigated in detail.It is found that the intensity distribution of EHChG beams will approach to a Gaussian profile after propagating in the turbulent atmosphere.It is also found that a coherent EHChG beam will change into a partially coherent one at the influence of the turbulent atmosphere,and the coherence of beams is getting worse for a longer propagation distance or a stronger atmospheric turbulence.In addition,the power in bucket（PIB） of the EHChG beams has been discussed.It is shown that the PIB of the EHChG beam propagating in turbulent atmosphere is related with the the intensity of the atmospheric turbulence,the propagation distance,and the beam parameter m and n.

关 键 词：EHChG光束 湍流大气 空间相干度 桶中功率 

分 类 号：O435[机械工程—光学工程]