Light-weight optical antenna and method for realizing capturing and tracking based on light-weight optical antenna

Abstract

The invention discloses a light-weight optical antenna and a method for realizing capturing and tracking based on the light-weight optical antenna. The problems that a traditional mechanical rotary table type optical antenna is extremely large in weight power consumption, slow in response based on a liquid crystal phased array optical antenna purely, too small in wedge-shaped double-frequency liquid crystal phased array area and uneven in response time are solved. The antenna comprises a coarse tracking liquid crystal, a coarse tracking liquid crystal controller, a beam shrinking system, a fine tracking liquid crystal, a fine tracking liquid crystal controller, a spectroscope, a first coupling system, a single-mode optical fiber, a second coupling system, a detector and a data analysis andinstruction system. The antenna can be used for receiving a laser beam of a communication target and emitting the laser beam to the communication target. According to the optical antenna, capturing and tracking of space laser beams are achieved through cascade connection of two stages of liquid crystal devices, and compared with a mechanical rotary table type optical antenna, the optical antennahas the advantages of being small in size, light in weight and low in power consumption; meanwhile, high-precision pointing change of light beams is achieved through deflection of the double-state double-frequency liquid crystal, and the advantages of being fast in light beam pointing and short in response time are achieved.

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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