Far-field properties of circular flattened Gaussian beams diffracted by a circular aperture(圆平顶高斯光束经圆形光阑衍射的远场特性)

基于角谱表述和稳相法，导出了圆平顶高斯光束经圆形光阑衍射后在远场的解析表达式，进而利用该公式数值计算了衍射圆平顶高斯光束在远场的归一化强度分布和远场发散角.结果表明，f参数对衍射圆平顶高斯光束远场傍轴性的影响相对较大，而截取参数δ的影响相对较小.衍射圆平顶高斯光束采用非傍轴处理和傍轴处理两者的差异与光束阶数N无关.随着f参数的增大，衍射圆平顶高斯光束的远场发散角先增大后趋向于一饱和值.增大截取参数δ，远场发散角先增大后趋向于一最小值.衍射圆平顶高斯光束的远场发散角几乎与光束阶数N无关....

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Bibliographic Details

Published in:	Zhejiang Daxue xuebao. Lixue ban
Main Authors:	XUYi-qing(徐一清), ZHOUGuo-quan(周国泉)
Format:	Article
Language:	Chinese
Published:	Zhejiang University Press 2012-09-01
Subjects:	圆平顶高斯光束 远场特性 圆形光阑 衍射
Online Access:	https://doi.org/10.3785/j.issn.1008-9497.2012.05.010