Single-photon imaging radar system

Abstract

The invention provides a single-photon imaging radar system. The system comprises a signal source which is used for generating a synchronization signal and a gating signal; a fiber laser is used for receiving the synchronizing signal and responding to the synchronizing signal to emit a laser pulse; a first optical switch and a second optical switch are used for receiving the gating signal and responding to the gating signal to be opened or closed so as to control whether the laser pulse passes through the optical switches or not; a light splitting device is used for receiving the laser pulse transmitted by the first optical switch and transmitting the laser pulse to the optical transceiver board, or used for receiving the laser pulse transmitted by the optical transceiver board and transmitting the laser pulse to the second optical switch; an optical transceiver board; a single-photon detector is used for receiving the gating signal and the laser pulse, opening or closing in response to the gating signal, generating a detection signal in response to the laser pulse when the single-photon detector is opened, and transmitting the detection signal to the time-to-digital converter; and a time-to-digital converter is used for receiving the synchronization signal and the detection signal and recording time information.

Description

Technical field[0001]The present disclosure relates to the field of laser radar, and more particularly to a single photon imaging radar system.Background technique[0002]Laser imaging radar is one of the most accurate three-dimensional imaging techniques of application, which is the main principle that the laser pulse is transmitted to the target area and receives the echo, and the distance between the target and the emission point is obtained by measuring the flight time of the photon. A three-dimensional image of the target object is obtained by scanning a target area.[0003]The three-dimensional imaging system completed by the three-dimensional imaging system, such as the study team of China University of Science and Technology, China, or the three-dimensional pulse laser imaging system completed by the University of Herry Watt University. The above technique achieves three-dimensional imaging of 10km distance external object, however they have a large diameter telescope as a beam ...

AI Technical Summary

Problems solved by technology

The above technologies realize three-dimensional imaging of objects at a distance of 10km. However, they all use large-aperture telescopes as beam transceiver devices, and their overall structure is complex and bulky. At the same time, the above technologies solve the problem of beam receiving efficiency, or use large Laser power, or use a long integration time, but these measures also increase the noise and cannot meet the needs of fast imaging

[0004] Therefore, in the process of realizing the present invention, it is found that the structure of the lidar imaging radar system in the related art is complex and bulky, not portable, and has no effective noise reduction means, which in turn affects the imaging distance, imaging speed and resolution

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