A fast-aligned long-distance laser atmospheric communication receiving device and communication method

Abstract

The invention provides a long-distance laser atmosphere communication receiving device with the fast alignment function and a communication method. The device comprises a laser optical receiving assembly, a laser communicating photoelectric detector, a laser communicating receiving assembly, a laser alignment photoelectric detector assembly, a light spot alignment signal processing assembly, a motor control system and a servo system. A four-prism with a small hole in the center is applied, and the device has the advantages that a light path shared by alignment and laser communication reception is achieved, and the alignment precision is improved; the two functions of alignment and communication reception are achieved by applying one optical system, two original discrete systems are fused into one system, the flexibility of the system is improved, and the size and the weight of the system are reduced. In addition, a compensating lens can move front and back to make the image plane position move, the size of the image plane of incident light is changed, and the alignment function is achieved when the size of the image plane is large; atmosphere laser communicating is carried out when the size of the image plane is small, and different light beams can be switched between alignment and laser information reception effectively.

Description

technical field [0001] The invention belongs to the technical field of optical communication, and mainly relates to a laser communication receiving system, in particular to a fast-aligned long-distance laser atmospheric communication receiving device and a communication method. Background technique [0002] Atmospheric laser communication uses laser as the carrier optical signal and uses the atmosphere as the transmission medium to carry out point-to-point two-way transmission of voice, data, image and other information. It mainly includes two parts: transmitting and receiving. Atmospheric laser communication equipment has the characteristics of good environmental mobility, strong anti-electromagnetic interference, high communication reliability, good concealment, convenient installation, and convenient use. It has become an indispensable technology for today's communication networks, and has a large Expansion capacity. The application of laser communicators in the field of...

AI Technical Summary

Problems solved by technology

A sight is usually used for aiming, which takes a lot of time and cannot achieve precise alignment, which reduces work efficiency

In addition, although the method of aiming with a spot tracker is feasible, it cannot share the optical axis with the atmospheric laser communication receiver, and it is still impossible to achieve precise alignment. Moreover, the use of dual systems increases the cost, volume and weight, which is not an optimal solution. best solution

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