A beaconless laser communication system and method with switchable optical path

Abstract

The present invention relates to the field of laser communication, in particular to a non-beacon laser communication system and method with switchable optical paths. The device and the optical path switching time-division multiplexing mechanism; the optical path switching time-division multiplexing mechanism is used to avoid the optical path between the signal light capture and tracking detector and the signal light transceiver device in the process of capturing and rough tracking, and is also used to During the fine tracking process, the optical path between the signal light capture and tracking detector and the signal light capture and coarse tracking lens is blocked, and the optical path between the signal light transceiver device and the signal light capture and tracking detector is connected. The invention does not use beacon light to assist link establishment, simplifies the system structure of the laser communication terminal, and reduces volume, weight and power consumption. In addition, the optical path switching time-division multiplexing mechanism realizes the flexible switching of coarse and fine tracking states, and effectively integrates load resources.

Description

technical field [0001] The invention relates to the field of laser communication, in particular to a beaconless laser communication system and method with switchable optical paths. Background technique [0002] For satellite-to-ground, inter-satellite, air-to-ground and other space laser communication systems, the communication terminals mainly rely on the acquisition, targeting, tracking (ATP) technology to establish communication links. Usually, the laser communication ATP system will use the beacon light to scan the uncertain area of ​​the other party, and its large divergence angle can make the acquisition and tracking process relatively easy, but the beacon light and the signal light are usually two different wavelengths. For lasers and communication terminals, a complete set of subsystems including optical transceiver antennas, electronic control, and signal processing should be designed for the emission and reception of beacon light, which makes the laser communicatio...

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is to provide a non-beacon laser communication system and method with a switchable optical path, so as to solve the problem of complex structure and problems caused by the use of beacon light for ATP and signal light for data transmission in traditional space laser communication terminals. The technical problems of large volume, large weight and high power consumption provide a hardware foundation for ATP and data transmission using only signal light

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