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Broadband optical orbital angular momentum multiplexing and demultiplexing method and device and storage medium

A technology of orbital angular momentum and demultiplexing, applied in polarization multiplexing systems, free space transmission, etc., can solve problems such as system complexity and achieve the effect of reducing complexity

Pending Publication Date: 2021-06-04
SHENZHEN UNIV
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Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a broadband optical orbital angular momentum multiplexing and demultiplexing method and device for the above-mentioned defects of the prior art, aiming at solving the problem of broadband optical orbital angular momentum multiplexing and demultiplexing in the prior art. Problems of System Complexity in Demultiplexing

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  • Broadband optical orbital angular momentum multiplexing and demultiplexing method and device and storage medium
  • Broadband optical orbital angular momentum multiplexing and demultiplexing method and device and storage medium
  • Broadband optical orbital angular momentum multiplexing and demultiplexing method and device and storage medium

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[0023] In order to make the object, technical solution and effect of the present invention more clear and definite, the present invention will be further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0024] The vortex beam carrying OAM has an annular intensity distribution and a helical phase wavefront exp(ilθ), where l is the topological charge and θ is the azimuth angle. OAM beams have a wide range of applications in optical manipulation, quantum information processing, super-resolution imaging and other fields. In addition, the number of OAM eigenstates is theoretically infinite, and different OAM beams are mutually orthogonal. OAM modes offer a new degree of freedom in addition to other inherent physical properties of light, such as amplitude, frequency, and phase. Therefore, optic...

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Abstract

The invention discloses a broadband optical orbital angular momentum multiplexing and demultiplexing method and device and a storage medium. The method comprises the steps: transmitting signal light through a plurality of independent polarization and independent wavelength light sources, enabling the signal light to enter a metasurface grating from different angles, generating OAM light beams with different topological charges, synthesizing the OAM light beams into a coaxial light beam in a 0-level diffraction direction, and enabling the coaxial light beam to be emitted out, thereby realizing the OAM multiplexing; the coaxial light beam is incident on the metasurface grating, the OAM light beam is reduced into Gaussian light at different diffraction orders, signal light is obtained after small hole filtering, OAM demultiplexing is achieved, and the complexity of the system is reduced. The problem of complexity of a broadband optical orbital angular momentum multiplexing and demultiplexing system in the prior art is solved.

Description

technical field [0001] The invention relates to the technical field of orbital angular momentum channel multiplexing and demultiplexing, in particular to a broadband optical orbital angular momentum multiplexing and demultiplexing method and device. Background technique [0002] A vortex beam carrying OAM (orbital angular momentum) has an annular intensity distribution and a helical phase wavefront exp(ilθ), where l is the topological charge and θ is the azimuth angle. Optical OAM can be realized as an independent information carrier for free-space optical communication. Due to the physical infinity of the OAM mode, it will bring unprecedented opportunities for ultra-high-capacity free-space optical communication. [0003] As a communication channel, OAM mode has the advantages of high bit rate and low bit error rate. A very critical issue that arises with OAM multiplexing communication is the generation and multiplexing / demultiplexing of OAM beams. Traditionally, generat...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04J14/06H04B10/11
CPCH04J14/06H04B10/11
Inventor 陈书青吴海生谢智强贺炎亮刘俊敏苏明样杨博李瑛
Owner SHENZHEN UNIV
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