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A system for suppressing the influence of atmospheric turbulence in orbital angular momentum space optical communication

A space optical communication and orbital angular momentum technology, applied in the field of space optical communication, can solve the problems of high cost and complex structure, and achieve the effects of improved performance, easy implementation and simple structure

Inactive Publication Date: 2017-12-22
SOUTH CENTRAL UNIVERSITY FOR NATIONALITIES
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  • Abstract
  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

The adaptive optics system needs to continuously detect the wavefront or light intensity distribution of the beam, and dynamically control the correction module to correct the beam according to the detection results. Although it does have a certain improvement effect on communication, the general structure is complex and costly, and it is difficult to Widely used in actual communication occasions

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  • A system for suppressing the influence of atmospheric turbulence in orbital angular momentum space optical communication

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Embodiment Construction

[0036] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0037] 1. Overall

[0038] Such as figure 1 , the system includes a polarization beam splitter 10, a first beam splitter 20, a second beam splitter 30, a spatial light modulator 40, an optical mixer 50 and a photodetector 60;

[0039] Its connected relationship is:

[0040] The polarizing beam splitter 10 communicates with the first beam splitter 20 and the second beam splitter 30 respectively;

[0041] The first beam splitter 20, the spatial light modulator 40, the optical mixer 50 and the photodetector 60 are connected in sequence;

[0042] The second beam splitter 30, the optical mixer 50, and the photodetector 60 are connected in sequence.

[0043] 2. Functional components (structure and function)

[0044] 1) Polarizing beam splitter 10

[0045] The polarizing beam splitter 10 is an optical device capable of making the two parts of the light b...

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Abstract

The invention discloses a system for inhibiting influence of atmospheric turbulence in orbital angular momentum free space optical communication, and relates to free space optical technology. The system comprises a polarization beam splitter (10), a first beam splitter (20), a second beam splitter (30), a free space optical modulator (40), an optical frequency mixer (50) and a photoelectric detector (60); communication relations are as follows: the polarization beam splitter (10) is respectively communicated with the first beam splitter (20) and the second beam splitter (30); the first beam splitter (20), the free space optical modulator (40), the optical frequency mixer (50) and the photoelectric detector (60) are sequentially communicated; the second beam splitter (30), the optical frequency mixer (50) and the photoelectric detector (60) are sequentially communicated. Compared with the prior art, the system for inhibiting the influence of the atmospheric turbulence in the orbital angular momentum free space optical communication has the advantages that separation of different orbital angular momentum (OAM) channel information in light beams is implemented; the influence of the atmospheric turbulence is inhibited to a certain extent, and communication system performances are improved; the structure is simple, and implementation is easy.

Description

technical field [0001] The invention relates to space optical communication technology, in particular to a system for suppressing the influence of atmospheric turbulence in orbital angular momentum space optical communication. Background technique [0002] Orbital Angular Momentum (OAM) beam refers to a beam whose wavefront contains a helical phase structure, and the helical phase expression is exp(ilθ), where θ is the angular coordinate, l is the azimuth index, defined as OAM The topological charge of the beam. Optical field distributions with different topological charges are also called different OAM modes. [0003] In recent years, research on the application of OAM beams in optical communication has begun to rise. In optical communication, OAM beams with different topological charges can be used as different multiplexing channels to transmit information. The main direction of current research is to use OAM light beams in free space optical communication. The OAM ligh...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B10/50H04B10/548H04L27/20
CPCH04B10/505H04B10/548H04L27/2096
Inventor 杨春勇甘雨徐创侯金陈少平
Owner SOUTH CENTRAL UNIVERSITY FOR NATIONALITIES