Mode Conversion and Transfer of Orbital Angular Momentum Between Hermite-Gaussian and Laguerre-Gaussian Beams

被引：8

作者：

Shen, Donghui ^{[1
]}

He, Tong ^{[1
]}

Yu, Xianbin ^{[2
,3
]}

Zhao, Daomu ^{[4
,5
]}

机构：

[1] Zhejiang Lab, Inst Intelligent Networks, Hangzhou 311100, Peoples R China

[2] Zhejiang Univ, Coll Informat Sci & Elect Engn, Hangzhou 310027, Peoples R China

[3] Zhejiang Univ, Zhejiang Lab, Hangzhou 311100, Peoples R China

[4] Zhejiang Univ, Zhejiang Prov Key Lab Quantum Technol & Device, Hangzhou 310027, Peoples R China

[5] Zhejiang Univ, Dept Phys, Hangzhou 310027, Peoples R China

来源：

IEEE PHOTONICS JOURNAL | 2022年 / 14卷 / 01期

基金：

中国国家自然科学基金;

关键词：

Laser beams; Lenses; Measurement by laser beam; Extraterrestrial measurements; Optical beams; Optical vortices; Diffraction; Mode converter; orbital angular momentum; vortex beam; LIGHT; INTERFERENCE; CHARGE;

D O I：

10.1109/JPHOT.2022.3140359

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

The cross phase (CP) opens up a new horizon for the generation and measurement of vortex beams, and the conversion between Hermite-Gaussian (HG) and Laguerre-Gaussian (LG) modes can be done with a CP. However, the conversion plane is in the far plane, and the width cannot be adjusted. In this article, we present a more convenient and practical mode converter between HG and LG modes based on CP combined with a lens. The feasibility of the converter for the conversion between two modes is theoretically analyzed. The conversion can be accomplished in the determined plane and the width of converted beam can be controlled by adjusting the parameter of converter. Proof-of-concept experiment is carried out to verify theoretical analysis and the experimental results are agree well with theoretical simulations. The transfer of orbital angular momentum (OAM) between two modes after passing through the converter is also analyzed. From the perspective of OAM conservation, the required parameter conditions for the converter are discussed. In principle, such a converter as proposed here might even be applied to microwave, millimeter wave, and terahertz OAM fields.

引用

页数：6

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