Laser communication method and system based on two-dimensional laser phased array

Abstract

The invention relates to the technical field of laser communication, and provides a laser communication method and system based on a two-dimensional laser phased array, and the method comprises the steps: employing an active two-dimensional phased array technology to overcome the interference of atmospheric turbulence on a laser channel, achieving the scanning of a designated area through coherent combination of light beams, finding a target, and building an effective laser communication channel with the target after the target is stably tracked. The system comprises a transmitting unit, a receiving unit and a display control unit, wherein the transmitting unit comprises a laser, a laser beam splitter, a laser phase controller, a laser communication encoder, a laser amplifier, a laser beam combiner, a microlens array and a transmitting optical module; the receiving unit comprises a receiving optical module and an imaging sensor; the display control unit comprises an image processing computer. According to the method and the system provided by the invention, the laser two-dimensional phased array technology and the laser communication technology are combined, the physical experiment research of an algorithm and a hardware system is carried out, and the method and the system are of great significance for improving the laser communication capability.

Description

technical field [0001] The invention belongs to the technical field of laser communication, and more specifically relates to a laser communication method and system based on a two-dimensional laser phased array. Background technique [0002] In the past, laser communication was a single-beam communication. The laser energy and beam quality determined the communication distance. At the same time, the main factor affecting the laser communication distance was atmospheric turbulence, which caused the far-end laser spot to be dispersed and the energy was not concentrated, which seriously weakened the operating distance and reduced the Communication quality, resulting in an increase in the communication bit error rate. According to the concept of phased array, the phase locking of the laser in the far field can be effectively realized without increasing the laser power or changing the quality of the laser beam, and partially overcome the influence of atmospheric turbulence on the...

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Problems solved by technology

[0002] In the past, laser communication was a single-beam communication. The laser energy and beam quality determined the communication distance. At the same time, the main factor affecting the laser communication distance was atmospheric turbulence, which caused the far-end laser spot to be dispersed and the energy was not concentrated, which seriously weakened the operating distance and reduced the Communication quality, resulting in an increase in the communication bit error rate

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