摘要
对激光多脉冲探测理论进行了分析,在考虑了影响探测的各种噪声及其分布特性的基础上,得到了激光多脉冲探测信噪比与脉冲积累次数的定量关系。利用计算机仿真模拟多脉冲探测,其结果与理论分析相符;在实验室条件下对多脉冲探测进行了研究,实验结果表明,在脉冲叠加数较少时,实验与理论符合得很好,当脉冲叠加数较多时,实验数据明显小于理想的数值,分析了出现这种偏差的原因及解决方案。激光多脉冲积累探测可以有效地提高激光探测的信噪比,应用积累探测的方式能有效地将激光探测的弱信号从强噪声背景中检测出来。
Theoretical analysis of laser multi-pulse accumulation detection is carried. The quantitative relation of laser multi-pulse accumulation detection SNR with multi-pulse accumulation times is obtained under taking into the account of the all kinds of noise and its distributing characteristics. Computer simulation of laser multi-pulse accumulation detection study is performed and its result accords with the theoretical analysis. The experiment of laser multi-pulse accumulation detection is performed in the lab condition, and shows that the experimental results accord with the theoretical results very well at the less quantity of accumulation times, and the experimental results are less than the theoretical results dearly at the more quantity of accumulation times. The cause of the departure existence is studied and the solving method is presented. The SNR of laser detection can be improved effectively by the multi-pulse accumulation detection, and the weak signal can be detected from strong noise background by using the multi-pulse accumulation detection method.
出处
《红外与激光工程》
EI
CSCD
北大核心
2007年第1期60-63,共4页
Infrared and Laser Engineering
基金
国防预研基金资助项目(9140A05030206HT0116)
关键词
激光多脉冲积累探测
计算机模拟与实验
信噪比
弱信号检测
Laser multi-pulse accumulation detection
Computer simulation and experiments
SNR
Weak signal detection
