Research On Detection System Scheme Of Long Range Tracking Laser Radar

Laser radar and laser rang-finder is the early application of laser, and the important application of military affairs. In recent years, with the development of high-energy laser weapon (laser gun), the research of long range tracking laser radar, as target detector of the laser weapon, was set store by in the world. It was researched in this paper that the long distance laser tracking radar sensing system which fit for high-energy laser weapon,s target distance-angle detection system, the maximum range was 200km, with ability of tracking, and build-up the target detection system of high-energy laser weapon along with follow-up platform,radar and infrared tracking system.A key technology of the current non-scan imaging laser radar, focal plane array with time processing, is now in the development stage, although part of band was developed for laser radar, it is not obtainable now. In paper, the scheme of micro-lens array coupled with optical fiber is taken.Through the study about the characteristic of laser transmission in atmospheric, accord to laser radar equation, and calculated the laser power on the detector. Analysis noise characteristic, backward characteristics at short-range, analysis the system directivity on the calculation of the signal noise ratio. On the groundwork of these analysis, and the overall design of the system is determined.On the optical system design, the detector scheme is presented that diffraction micro-lens array coupled with optical fiber, the principle to improve the performance of the detector is analyzed, and the relationship between power availability and parameters of diffraction micro-lens array is derived. Completed the optical design under the help of optical software, and finished optical performance analysis.On the circuit design, calculate band width in amplifier circuit and optimal gain, analysis range of amplifier circuit gain control range, and finished the design of controllable gain amplifier circuit. Provide the working flow of digital logic circuit.