Atmospheric turbulence detection method and system based on vortex electromagnetic waves

A technology of vortex electromagnetic waves and atmospheric turbulence, applied in the field of atmospheric detection, can solve the problem of inability to effectively detect long-distance atmospheric turbulence

Active Publication Date: 2020-04-03
WUHAN UNIV
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Problems solved by technology

[0005] In view of the above defects or improvement needs of the prior art, the present invention proposes a method and system for detecting atmospheric turbulen

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  • Atmospheric turbulence detection method and system based on vortex electromagnetic waves
  • Atmospheric turbulence detection method and system based on vortex electromagnetic waves
  • Atmospheric turbulence detection method and system based on vortex electromagnetic waves

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[0040] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention. Obviously, the described embodiments are part of the present invention Examples, not all examples. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0041] When the vortex electromagnetic wave is transmitted in the atmosphere, the phase distortion caused by atmospheric turbulence will interfere with the complex amplitude of the electromagnetic wave.

[0042] In the weak fluctuation region of atmospheric turbulence, when the electromagnetic wave propagates along the positive propagation direction z>0, the hypergeometric Gaussian...

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Abstract

The invention discloses an atmospheric turbulence detection method and system based on vortex electromagnetic waves, and belongs to the field of atmospheric detection. The method comprises the steps:transmitting OAM electromagnetic waves to a to-be-detected region; receiving backscattered electromagnetic waves for the to-be-detected area, identifying a wave field distribution function of the backscattered electromagnetic waves, and solving a complex phase interference factor of atmospheric turbulence according to the wave field distribution function of the backscattered electromagnetic wavesand the wave field distribution function of the OAM electromagnetic waves under the turbulence-free condition; and solving a phase factor corresponding to the atmospheric turbulence according to the wave field distribution function of the backscattered electromagnetic wave and the probability density distribution of the orbital angular momentum mode of the hyper-geometric Gaussian beam in the radial direction, and representing the state of the atmospheric turbulence by using the complex phase interference factor and the phase factor. The device can effectively detect long-distance atmosphericturbulence.

Description

technical field [0001] The invention belongs to the technical field of atmospheric detection, and more specifically relates to a method and system for detecting atmospheric turbulence based on vortex electromagnetic waves. Background technique [0002] Since Reynolds discovered the phenomenon of turbulent flow in 1883, the research on the mechanism of turbulent flow, the structure of turbulent flow and the basic law of turbulent flow has been the focus of fluid mechanics and heat transfer scientists for more than one hundred years. Turbulent flow is a kind of nonlinear fluid motion in which the atmosphere is irregular in space and disorder in time. This motion shows a highly complex three-dimensional unsteady state and irregular flow state with rotation. Atmospheric turbulence will lead to changes in the real-time structure of the atmosphere, and will also have a certain interference effect on the propagation of light waves, sound waves, and electromagnetic waves in the atmo...

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Application Information

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IPC IPC(8): G01S13/95G01S7/41
CPCG01S13/958G01S13/95G01S7/418Y02A90/10
Inventor 周晨王翔周欣赵正予
Owner WUHAN UNIV
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