Automatic light beam capturing device and light beam capturing method

Abstract

The invention discloses an automatic light beam capturing device, which comprises an optical antenna connected with an automatic tracking system. A Brewster window and a corner reflector are arranged on the emergent light side of the optical antenna. A focusing lens and a signal detector are arranged on the reflected light side of the Brewster window. A position-sensitive detector is arranged on the emergent light side of the Brewster window and is communicated with the automatic tracking system through a feedback channel. The light beam capturing method comprises that the optical antenna injects light signals to the corner reflector through the Brewster window after the optical antenna focuses the light signals; the corner reflector reflects the received light signals to the Brewster window, the reflected light is downward projected onto the position-sensitive detector, the Brewster window reflects partial light to the focusing lens and the light signals are received through the detector; and the position-sensitive detector calculates to obtain the position information of light, the position information is fed back to the automatic tracking system, and the automatic tracking system adjusts the transmitting direction and the pitch angle of the optical antenna. Since the invention combines an ATP with a signal laser, the invention has the advantages of simple structure, high economy and high feasibility and the device is suitable for ground atmosphere laser communication systems.

Description

technical field [0001] The invention belongs to the technical field of communication, and in particular relates to a light beam automatic capture device, and also relates to a method for using the device to capture light beams. Background technique [0002] In the space optical communication system, because the long-distance transmission of light will cause a large loss of light energy, the received light signal is often very weak. In addition, the background light (sun, moon, stars, etc.) will also produce strong interference, which greatly increases the difficulty of receiving optical signals. Therefore, how to capture, align and track light beams in the case of relatively long distances and strong background interference has become a key factor for the success of optical communication links. key. Ground atmospheric laser communication is different from space laser communication. In the space optical communication system, since the beam divergence angle of the communicati...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide an automatic light beam capture device, which solves the problem that the existing beam capture device separates the beacon light and the signal light, the system structure is not compact, it is not convenient for optical, mechanical and electrical integration, and it is not suitable for the ground atmospheric laser communication system.

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