Generating, multiplexing/demultiplexing and receiving the orbital angular momentum of radio frequency signals using an optical true time delay unit

被引：26

作者：

Gao, Xinlu ^{[1
]}

Huang, Shanguo ^{[2
]}

Zhou, Jing ^{[1
]}

Wei, Yongfeng ^{[2
]}

Gao, Chao ^{[2
]}

Zhang, Xukai ^{[2
]}

Gu, Wanyi ^{[2
]}

机构：

[1] Beijing Normal Univ, Dept Phys, Appl Opt Beijing Area Major Lab, Beijing 100875, Peoples R China

[2] Beijing Univ Posts & Telecommun, State Key Lab Informat Photon & Opt Commun, Beijing 100876, Peoples R China

来源：

JOURNAL OF OPTICS | 2013年 / 15卷 / 10期

基金：

中国国家自然科学基金;

关键词：

optical true time delay; fiber optics and optical communications; radio over fiber; optical angular momentum; PHOTONS; LIGHT;

D O I：

10.1088/2040-8978/15/10/105401

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

A scheme for generating and/or eliminating the orbital angular momentum (OAM) of radio frequency (RF) signals based on the true time delay (OTTD) system is proposed for the first time. The central structure of the scheme is the OTTD unit connected with a circular antenna array which can provide or compensate the helical phase variation precisely, and therefore can form or eliminate the OAM radio beam with different states (the topological charges) conveniently. Other prominent advantages of the proposed system are support for multiplexing/demultiplexing the OAM states carried on the RF signals with the same frequency and support for exchange of the OAM states carried on two RF signals. This can be regarded as the analog of various other multiplexing technologies for increasing the capacity and efficiency in radio communication systems. Theoretical analysis and numerical simulations demonstrate the feasibility of the proposed scheme.

引用

页数：6

共 18 条

[1] ORBITAL ANGULAR-MOMENTUM OF LIGHT AND THE TRANSFORMATION OF LAGUERRE-GAUSSIAN LASER MODES [J].