ORBITAL ANGULAR MOMENTUM OF AN ASTIGMATIC HERMITE-GAUSSIAN BEAM

被引：0

作者：

Kotlyar, V. V. ^{[1
,3
]}

Kovalev, A. A. ^{[1
,3
]}

Porfirev, A. P. ^{[2
,3
]}

机构：

[1] Samara Natl Res Univ, Samara, Russia

[2] Samara Natl Res Univ, Tech Cybernet Dept, Samara, Russia

[3] RAS, Image Proc Syst Inst, Branch FSRC Crystallog & Photon, Samara, Russia

来源：

COMPUTER OPTICS | 2018年 / 42卷 / 01期

基金：

俄罗斯基础研究基金会; 俄罗斯科学基金会;

关键词：

orbital angular momentum; elliptical Hermite-Gaussian beam; phase reconstruction;

D O I：

10.18287/2412-6179-2018-42-1-13-21

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

An explicit formula for the normalized orbital angular momentum (OAM) of an elliptical Her mite -Gaussian (HG) beam of orders (0, n) focused by a cylindrical lens is obtained. In modulus, this OAM can be both greater and smaller than n. If the cylindrical lens focuses not an elliptical, but a conventional HG beam, the latter will also have an OAM that can be both larger and smaller in modulus than that of an elliptical HG beam. For n = 0, this beam converts to an astigmatic Gaussian beam, but, as before, it will still have OAM. With the help of two interferograms, a phase of the astigmatic Gaussian beam is reconstructed, which is then used to calculate the normalized OAM. The values of the OAM calculated by the theoretical formula and using a hybrid method combining modeling with experiment differ only by 6 %.

引用

页码：13 / 21

页数：9

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