摘要
基于广义惠更斯-菲涅尔原理,并采用将部分相干双曲余弦高斯光束用厄米-高斯光束的非相干叠加表示的方法,研究了部分相干双曲余弦高斯光束通过湍流大气的光束扩展问题,推导出了部分相干双曲余弦高斯光束通过湍流大气均方根束宽的解析表达式.研究表明,部分相干双曲余弦高斯光束的扩展随着湍流大气的折射率结构常数C2n和光束离心参数δ的增大而加剧.但是,随着δ的增大,部分相干双曲余弦高斯光束受到湍流的影响减小.
Based on the extended Huygens-Fresnel principle, the spreading of partially coherent cosh-Gaussian beams propagating through turbulent atmosphere is studied by using the incoherent superposition of higher-order Hermite-Gaussian beams. The analytic expression of the mean-squared width of partially coherent cosh-Gaussian beams in turbulence is derived. It is shown that the spreading increases with increasing turbulent parameter Cn^2 and decentered parameter δ of the beams. However, partially δ coherent cosh-Gaussian beams with larger δ are less sensitive to the effect of turbulence than those with smaller δ.
出处
《物理学报》
SCIE
EI
CAS
CSCD
北大核心
2006年第2期978-982,共5页
Acta Physica Sinica
基金
国家高技术863-802项目(批准号:A823070)
四川省教育厅自然科学基金(批准号:2005A093)资助的课题.~~
关键词
部分相干双曲余弦高斯光束
湍流大气
光束扩展
partially coherent eosh-Gaussian beam, turbulence atmosphere, beam spreading
