Universal orbital angular momentum spectrum analyzer for beams

Shiyao Fu; Yanwang Zhai; Jianqiang Zhang; Xueting Liu; Rui Song; Heng Zhou; Chunqing Gao

doi:10.1186/s43074-020-00019-5

Universal orbital angular momentum spectrum analyzer for beams

doi: 10.1186/s43074-020-00019-5

基金项目:

National Postdoctoral Program for Innovative Talents of China (BX20190036)

China Postdoctoral Science Foundation (2019M650015)

National Natural Science Foundation of China (NSFC) (11834001, 61905012)

CETC joint research foundation (6141B08231125).

Beijing Institute of Technology Research Fund Program for Young Scholars

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出版历程
- 收稿日期: 2020-05-13
- 录用日期: 2020-07-23
- 网络出版日期: 2020-08-17

Universal orbital angular momentum spectrum analyzer for beams

1.
School of Optics and Photonics, Beijing Institute of Technology, Beijing, 100081, China
2.
Key Laboratory of Photoelectronic Imaging Technology and System, Ministry of Education of the People’s Republic of China, Beijing, 100081, China

Funds:

National Postdoctoral Program for Innovative Talents of China (BX20190036)

China Postdoctoral Science Foundation (2019M650015)

National Natural Science Foundation of China (NSFC) (11834001, 61905012)

CETC joint research foundation (6141B08231125).

Beijing Institute of Technology Research Fund Program for Young Scholars

摘要

摘要: The orbital angular momentum (OAM) of beams provides a new dimension, and have already found lots of applications in various domains. Among such applications, the precisely and quantitatively diagnostic of intensity distributions among different OAM modes, namely the OAM spectrum of a beam, is of great significance. In this paper we propose and experimentally validate a simple interferential method to achieve this goal. By analyzing the interference pattern formed by the beam and a reference field, the OAM spectrum can be obtained instantaneously. Furthermore, the proposed method is also available for more complex light fields, for instance, the multi-ring optical vortices. In the proof-ofconcept experiment, the OAM spectra of both single-mode and N-fold multiplexed OAM modes with various intensity distributions are well detected. Our work offers a new way to precisely measure the OAM spectra of beams and will advance the development of many applications ranging from classical to quantum physics as the OAM based large-capacity data transmissions, rotation detection, quantum manipulation and so on.
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Abstract: The orbital angular momentum (OAM) of beams provides a new dimension, and have already found lots of applications in various domains. Among such applications, the precisely and quantitatively diagnostic of intensity distributions among different OAM modes, namely the OAM spectrum of a beam, is of great significance. In this paper we propose and experimentally validate a simple interferential method to achieve this goal. By analyzing the interference pattern formed by the beam and a reference field, the OAM spectrum can be obtained instantaneously. Furthermore, the proposed method is also available for more complex light fields, for instance, the multi-ring optical vortices. In the proof-of-concept experiment, the OAM spectra of both single-mode and N-fold multiplexed OAM modes with various intensity distributions are well detected. Our work offers a new way to precisely measure the OAM spectra of beams and will advance the development of many applications ranging from classical to quantum physics as the OAM based large-capacity data transmissions, rotation detection, quantum manipulation and so on.
- Orbital angular momentum /
- Orbital angular momentum spectrum /
- Laser field modulation /
- Interference

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参考文献(59)

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