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Fast acquisition system and method based on laser phased technology

A fast and laser technology, applied in the field of fast capture system based on laser phase control technology, can solve the problem of long capture time and achieve the effect of reducing capture time

Inactive Publication Date: 2014-07-09
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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Problems solved by technology

[0004] The purpose of the present invention is to provide a fast capture system based on laser phase control technology, which solves the problem of long capture time in the existing space laser communication link establishment process

Method used

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  • Fast acquisition system and method based on laser phased technology
  • Fast acquisition system and method based on laser phased technology
  • Fast acquisition system and method based on laser phased technology

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Embodiment 1

[0036] Embodiment 1: In this implementation example, the beacon light output by the beacon light polarized laser 1 is a 1064nm linearly polarized infrared laser, and its polarization direction is the y direction, and the liquid crystal optical phased arrays 1 and 2 are identical devices, namely: The direction of the electrode and the direction of the optical axis of the liquid crystal are perpendicular to each other, such as figure 2 As shown, but the spatial arrangement of the two devices is perpendicular to each other; the 1 / 2 wave plate 3 for 1064nm work is placed between the two liquid crystal phased arrays, and the angle between the direction of its optical axis and the optical axis of the two is 45° degree; through the above device, the 1064nm beacon light is decomposed into four beams, according to any existing double beam forming algorithm and beam pointing control algorithm, by changing the wave control code of the two liquid crystal phased arrays, the corresponding p...

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Abstract

The invention aims to provide a fast acquisition system and method based on a laser phased technology. Firstly, the spatial position where a target communication terminal is located is obtained by querying the ephemeris or orbital parameters, and the spatial position serves as the maximum probability position point to be located in the center of an area to be scanned; a coordinate system is built according to the center of the area to be scanned, and an uncertainty area is divided into four sub areas according to the center of the area to be scanned; a beacon light polarized laser, a first liquid crystal optical phased array, a one-half wave plate and a second liquid crystal optical phased array are arranged in sequence, beacon light emitted by the beacon light polarized laser points to the area to be scanned, and the uncertainty area is scanned; a target object is acquired finally. The system and method have the advantage that the acquisition time of the building process of space laser communication links is shortened.

Description

technical field [0001] The invention belongs to the technical field of laser phase control, and relates to a fast capture system and method based on the laser phase control technology. Background technique [0002] In the space laser communication system, due to the influence of factors such as orbital characteristics (obscuration of boresight) and channel characteristics (atmosphere, clouds), it is impossible to ensure continuous communication between two communication terminals. Therefore, the space laser communication ATP subsystem ( Acquisition, tracking and aiming) is the hardware basis for establishing a space communication link, among which: acquisition probability and acquisition time are key indicators to measure its performance. In the process of establishing a space laser communication link, due to the limitation of the beacon light power and the influence of the space background light, not only the beam divergence angle of the beacon light cannot cover the entire...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B10/11
Inventor 汪相如汤镇辉黄子强邱棋
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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