A 1.55 μm single-photon coherent lidar detection method and device

Abstract

A 1.55 μm single-photon coherent laser radar system device relates to the application field of laser technology. For the existing lidar, the detection method needs to improve the detection sensitivity, improve the detection distance capability of the seeker, improve the ability to obtain multi-dimensional information of the target, and improve the anti-jamming and target recognition capabilities. The present invention applies GM-APD focal plane detection to laser pulse coherent technology, adopts a Gm-APD heterodyne coherent scheme, and selects short-wave infrared wavelengths. This detection scheme has higher imaging detection sensitivity than coherent detection systems, and can simultaneously acquire The three-dimensional distance value of the target, the plane profile intensity value and the Doppler target velocity value can obtain more accurate target information differences under the three-dimensional angle of space, provide reliable three-dimensional space data for target recognition, tracking, etc., and have strong anti-interference in heterodyne detection On the basis of the ability, the detection sensitivity is improved to the single photon level, which is suitable for the field of weak light detection of long-range non-cooperative targets.

Description

A 1.55μm single-photon coherent lidar detection method and device technical field [0001] Relate to the application field of laser technology, be specifically related to a 1.55 μm single-photon coherent laser radar detection method and device set. Background technique Lidar has been widely used in military applications since its birth, among which laser active imaging guidance technology Technology is the application direction with the most key technologies and the most difficult. In the early 1980s, the first demonstration at the MIT Lincoln Laboratory in the United States Successful two-dimensional cell scanning laser pulse coherent radar anti-tank guidance technology, followed by DARPA and the US Air Force to support the cruise Missile Advanced Guidance (CMAG) program. In the early 1990s, this technology was successfully equipped with the AGM‑129A cruise missile, the world's It is the first model application in the world to solve the terrain matching problem th...

AI Technical Summary

Problems solved by technology

[0004] In order to solve the technical problem that the existing laser radar can no longer meet the detection requirements in the laser active imaging guidance technology, the scheme adopted in this application is as follows:

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