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部分相干高斯-谢尔光束在大气湍流中的平均强度与展宽 被引量：6

Average intensity and spreading of a partially coherent Gaussian Schell-model beam propagation through atmospheric turbulence
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摘要 基于广义惠更斯—菲涅耳原理,交叉密度函数以及Rytov’s相位结构函数二次近似,利用傅里叶高斯变换推导出部分相干高斯-谢尔光束在大气湍流中的强度分布表达式,并在此基础上分析了大气湍流对角展宽、桶中功率以及光束漂移的影响。数值结果表明:角展宽和光束漂移与光束的初始半径、光源的相干长度有关;远场能量集中度随湍流强度增加、光源相干宽度减小而减小。 Based on the extended Huygens - Fresnel integral, the cross - spectral density and Rytov ＇ s phase structure function, average intensity is derived by a formula for the Fourier transform of Ganssian function. Angular spread , PIB, beam wander of a partially coherent Gaussian - Schell - model （ GSM ） beam in turbulent atmosphere are found out. It shows that angular spread and beam wander have relation with initial beam radius, initial coherence width in the atmospheric turbulence, The energy centrality will decrease as the turbulence intensity increases, spatial correlation length decreases.
作者 向宁静 王明军 王太荣
机构地区 咸阳师范学院物理与电子工程学院 西安电子科技大学理学院
出处 《激光杂志》 CAS CSCD 北大核心 2012年第5期4-6,共3页 Laser Journal
基金 国家自然科学基金(61172031) 陕西省自然科学基金(2010JQ8016)
关键词 大气湍流 高斯-谢尔光束 平均强度 角辰壳 atmospheric turbulence Gaussian- Schell- model beam average intensity ongular spread
分类号 O431.1 [机械工程—光学工程]
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参考文献11

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共引文献2

同被引文献52

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引证文献6

二级引证文献36

激光杂志
2012年 第5期

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