A lightweight optical antenna and a method for capturing and aiming based on it

Abstract

The invention discloses a lightweight optical antenna and a method for capturing and aiming based on it, which overcomes the huge weight and power consumption of the traditional mechanical turntable optical antenna, the slow response of the optical antenna based solely on the liquid crystal phased array, and the wedge-shaped dual-frequency liquid crystal phased array. The problem of too small area and uneven response time. The antenna includes coarse tracking liquid crystal, coarse tracking liquid crystal controller, beam shrinkage system, fine tracking liquid crystal, fine tracking liquid crystal controller, beam splitter, first coupling system, single-mode fiber, second coupling system, detector and data analysis and instructions System; the antenna can be used to receive the laser beam of the communication target and transmit the laser beam to the communication target. The optical antenna uses two-stage liquid crystal devices cascaded to realize the capture and tracking of the space laser beam. Compared with the mechanical turntable optical antenna, it has the characteristics of small size, light weight and low power consumption; at the same time, it uses dual-state dual-frequency The deflection of the liquid crystal realizes the high-precision pointing change of the beam, which has the advantages of fast beam pointing and short response time.

Description

technical field [0001] The invention belongs to the field of space laser communication, and specifically relates to a novel light-weight optical antenna, and a method for capturing and tracking light beams of space laser communication based on the optical antenna. Background technique [0002] Because of its advantages of high speed and good confidentiality, space laser communication has become the necessary technical way for the backbone link of space information network. On-orbit demonstration verification. In order to build a complete space information network, a number of demonstration and verification programs related to space laser communication have been deployed at home and abroad. [0003] In the space laser communication system, the optical antenna is the core part of the establishment of the space laser link and the stable transmission of high-speed data. Its function is to capture the laser link to be transmitted, and quickly track and aim to make the beam stab...

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to propose a novel lightweight optical antenna and a method for capturing and aiming based on it, so as to overcome the large weight and power consumption of the traditional mechanical turntable optical antenna, the slow response of the optical antenna based solely on liquid crystal phased array, and the wedge-shaped double-sided antenna. The problem that the area of ​​the high-frequency liquid crystal phased array is too small and the response time is uneven

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