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A multi-user acquisition and tracking method based on liquid crystal optical phased array

A technology of liquid crystal optics and phased array, which is applied in the field of satellite laser communication and laser radar, which can solve the problems of difficult identification of multiple beams and low gain of system antenna, so as to reduce system complexity, improve accuracy and reduce consumption the effect of time

Inactive Publication Date: 2020-04-17
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this method has disadvantages such as low system antenna gain and difficulty in identifying multiple beams.

Method used

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  • A multi-user acquisition and tracking method based on liquid crystal optical phased array
  • A multi-user acquisition and tracking method based on liquid crystal optical phased array
  • A multi-user acquisition and tracking method based on liquid crystal optical phased array

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Embodiment Construction

[0021] The technical solution of the present invention will be further described below in conjunction with the accompanying drawings.

[0022] A multi-user acquisition and tracking method based on a liquid crystal optical phased array system of the present invention accesses multiple users at the same time under a single aperture, and uses the pointing characteristics of the grating lobes after the beam passes through the liquid crystal phased array to distinguish each user beam, And use the trajectory prediction method to detect the spot, and control each beam in real time.

[0023] The present invention is a method based on liquid crystal optical phased array system, such as figure 1 In the overall solution for dual-user access capture and tracking shown, the beam emitted by terminal A first passes through the attenuator to adjust the beam energy, and then passes through the polarization beam splitter (PBS). Since the phased array only works on polarized light in a fixed dir...

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Abstract

The invention discloses a multi-user capture and tracking method based on a liquid crystal optical phased array, which simultaneously accesses multiple users under a single aperture, and uses the pointing characteristics of the grating lobe after the beam passes through the liquid crystal phased array to distinguish each user's beam. And use the trajectory prediction method to detect the spot, and control each beam in real time. The invention utilizes the grating lobe directing angle characteristics generated after the beam passes through the liquid crystal optical phased array, can effectively realize the distinction of four beams on a single photodetector, and reduces the complexity of the system. The trajectory prediction method is used to detect the light spot in the deflection direction on the CCD, and the coordinates of the center of mass of the light spot in the beam deflection direction are locked in a small range, which can greatly reduce the time consumed by the detector to detect the light spot, and improve the accuracy of detecting the light spot in the deflection direction .

Description

technical field [0001] The invention belongs to the technical fields of satellite laser communication and laser radar, and in particular relates to a multi-user acquisition and tracking method based on liquid crystal optical phased array. Background technique [0002] The space information network is regarded as an important infrastructure of advanced countries in the world. At present, it is developing rapidly in the direction of larger and larger communication information capacity, more and more complex composition, and wider and wider coverage. Laser communication is an important means of high-speed transmission of space information network, which has the advantages of large information capacity, large optical gain, small divergence angle, strong anti-interference and anti-interception capabilities. In addition, the laser communication system has the characteristics of small size, light weight, and low power consumption, and it also has great advantages in space applicat...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02F1/29
CPCG02F1/292
Inventor 汪相如郭鸿儒贺晓娴
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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