摘要
为了改善当前激光雷达存在的对振动敏感,体积庞大,对人眼不安全等问题,综合国内外激光雷达研究现状的基础上,给出了一种新型光纤激光雷达的结构。该雷达利用光纤激光器作为光源,光路中大量采用了光纤器件,使得系统体积大大减小。采用相干探测的原理,根据激光雷达作用距离方程,给出了信噪比与光纤激光雷达作用距离的关系。根据所选的器件参数,通过理论计算,在探测概率为0.9,虚警概率小于10-4的情况下,得到了2km的最大作用距离。所设计的光纤激光雷达体积小,结构紧凑、新颖,具有良好的探测能力。
In order to overcome problems existing in the laser radar, such as sensitive to vibration, big size, insecure to the eyes and other issues, on the basis of integrating the status quo of laser radar at home and abroad, a new fiber laser radar system was presented. The fiber laser was used as the radiation source, and the usage of numerous optical fiber devices in the light path made the structure size smaller. Based on the coherent detective principle, according to laser radar ranging equation, the relationship between the signal to noise ratio and operation range of fiber laser radar was given. According to the selected device parameters, through theoretical calculation, a maximal range of 2 km was obtained at the situation of the probability of detection is 0.9, while the false alarm probability is less than 10^-4. The designed optical fiber laser radar is small, compact, novel, and has a good detection capability.
出处
《红外与激光工程》
EI
CSCD
北大核心
2009年第2期300-303,共4页
Infrared and Laser Engineering
基金
武器预研基金资助项目(9140A01040307HT0125)
关键词
光纤激光雷达
光纤激光器
信噪比
作用距离
Optical fiber laser radar
Optical fiber laser
SNR
Operation range
