Orbital angular momentum complex spectrum analyzer for vortex light based on the rotational Doppler effect

Hai-Long Zhou; Dong-Zhi Fu; Jian-Ji Dong; Pei Zhang; Dong-Xu Chen; Xin-Lun Cai; Fu-Li Li; Xin-Liang Zhang

doi:10.1038/lsa.2016.251

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Orbital angular momentum complex spectrum analyzer for vortex light based on the rotational Doppler effect

Original Articles

- Orbital angular momentum complex spectrum analyzer for vortex light based on the rotational Doppler effect
- Orbital angular momentum complex spectrum analyzer for vortex light based on the rotational Doppler effect
- LSA 2017年6卷第2期
- Affiliations：
  
  1.Wuhan National Laboratory for Optoelectronics, School of Optical and Electronic Information, Huazhong University of Science and Technology, Wuhan 430074, China
  2.Key Laboratory for Quantum Information and Quantum Optoelectronic Devices, Shaanxi Province, Department of Applied Physics, Xi'an Jiaotong University, Xi'an 710049, China
  3.State Key Laboratory of Optoelectronic Materials and Technologies and School of Physics and Engineering, Sun Yatsen University, Guangzhou 510275, China
- Author bio：
  
  JJ Dong, Email: jjdong@hust.edu.cn
  P Zhang, Email: zhangpei@mail.ustc.edu.cn
- Funds：
- DOI：10.1038/lsa.2016.251
  中图分类号：
- 纸质出版日期：2017-06，
  
  网络出版日期：2016-11-11，
  
  收稿日期：2016-06-27，
  
  修回日期：2016-10-31，
  
  录用日期：2016-11-08
- Accepted：
Scan QR Code
Orbital angular momentum complex spectrum analyzer for vortex light based on the rotational Doppler effect[J]. LSA, 2017,6(2).

Zhou, H. L. et al. Orbital angular momentum complex spectrum analyzer for vortex light based on the rotational Doppler effect. Light: Science & Applications, 6, e16251 (2017).
Orbital angular momentum complex spectrum analyzer for vortex light based on the rotational Doppler effect[J]. LSA, 2017,6(2). DOI： 10.1038/lsa.2016.251.

Zhou, H. L. et al. Orbital angular momentum complex spectrum analyzer for vortex light based on the rotational Doppler effect. Light: Science & Applications, 6, e16251 (2017). DOI： 10.1038/lsa.2016.251.

摘要

Abstract

The ability to measure the orbital angular momentum (OAM) distribution of vortex light is essential for OAM applications. Although there have been many studies on the measurement of OAM modes

it is difficult to quantitatively and instantaneously measure the power distribution among different OAM modes

let alone measure the phase distribution among them. In this work

we propose an OAM complex spectrum analyzer that enables simultaneous measurements of the power and phase distributions of OAM modes by employing the rotational Doppler effect. The original OAM mode distribution is mapped to an electrical spectrum of beat signals using a photodetector. The power and phase distributions of superimposed OAM beams are successfully retrieved by analyzing the electrical spectrum. We also extend the measurement technique to other spatial modes

such as linear polarization modes. These results represent a new landmark in spatial mode analysis and show great potential for applications in OAM-based systems and optical communication systems with mode-division multiplexing.

关键词

Keywords

mode analysisorbital angular momentumrotational Doppler effect

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