Satellite-to-earth link laser turbulent transmission simulation and communication performance detection apparatus
A satellite-ground link and communication performance technology, applied in the field of satellite-ground link laser turbulent transmission simulation and communication performance detection devices, can solve the problem that the far-field distribution of laser beams cannot be truly reflected
Inactive Publication Date: 2016-04-27
WUHAN UNIV
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Therefore, the simulated light field in the room cannot truly reflect the far-field distribution of the laser beam, and the transformation of the light field from the near field to the far field needs to be completed on the simulation platform
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[0047] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.
[0048] One, such as figure 1 As shown, the present invention sequentially includes in the light beam transmission direction:
[0049] A satellite-ground link laser turbulent transmission simulation and communication performance detection device is characterized in that it sequentially includes in the beam transmission direction:
[0050] Laser communication light source: emit laser beam;
[0051] The first phased array component: used to simulate the turbulent flow of the primary model, and use the grayscale image of the turbulent phase screen generated by the computer to drive the liquid crystal molecules to rotate, so as to realize the two-dimensional phase modulation of the incident laser wavefront, including sequentially arranged along the optical path A first fiber collimator, a polarizer, a first beam splitter, and a first liquid crystal phased...
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The invention relates to a satellite-to-earth link laser turbulent transmission simulation and communication performance detection apparatus which comprises a laser communication light source, a first optical fiber collimator, a polarizer, first, second and third beam splitters, first, second and third liquid crystal phased array devices, a long focal length lens system, first, second, third and fourth pore diaphragms, a first lens amplifier, a multi-lens amplifying system, a fourth beam splitter, a spatial optical detection module, a second optical fiber collimator, a communication receiving module, and a bit error rate tester. According to the satellite-to-earth link laser turbulent transmission simulation and communication performance detection apparatus, turbulent distortion phase screens of different models are generated by utilizing a plurality of liquid crystal optical phased array devices, so that three layers of turbulence models of the earth atmosphere can be really represented; and near-far field conversion of an optical field is achieved in a multi-lens series amplifying manner by utilizing the long focal length lens system, and variation of a boundary layer and a free convection layer at different heights is achieved, so that the satellite-to-earth link laser turbulent transmission simulation and communication performance detection apparatus can adapt to satellite-to-earth laser link conditions with different characteristics.
Description
technical field [0001] The invention relates to the field of free space laser communication, which is a laser turbulent transmission simulation and communication performance detection device for satellite-ground links, which can be used to simulate the light field changes of laser beams after long-distance transmission in complex turbulent channels, and can detect Communication bit error performance under turbulent channels, evaluating the effect of atmospheric turbulence on free-space laser communication performance. Background technique [0002] With the sharp increase in the amount of information acquired and the need for real-time transmission, the data rate of the information transmission system has exceeded Gbps. Laser communication can provide greater communication capacity, smaller power consumption and load, and stronger security performance. Therefore, the global all-optical communication network has become a hot research field, and the spaceborne platform will bec...
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Login to View More IPC IPC(8): H04B10/07
CPCH04B10/07
Inventor 单欣熊准段梦云艾勇
Owner WUHAN UNIV