直接光强检测方式下激光遥测表面微波的极限分析  

Limit Analysis of Microwave at Water Surface Sensed Remotely by Direct Laser Intensity Detection

作　　者：谢晨[1] 陈名松[1] 周田华[1,2] 高新朝[2] 

机构地区：[1]桂林电子科技大学信息与通信学院,广西桂林541004 [2]中国科学院上海光学精密机械研究所先进激光技术与应用系统实验室,上海201800

出　　处：《红外》2009年第2期10-14,共5页Infrared

基　　金：广西科学基金项目(0832012);广西区青年基金项目支持(0640065);广西研究生教育创新计划资助项目

摘　　要：得出了在直接光强检测方式下表面微波的最小可探测幅度值,并且分析了最小可探测幅度值分别和探测高度、接收孔径的关系。在直接光强检测方式下,针对水下声场形成的表面微扰现象,通过建立探测系统的一维物理模型进行了理论推算。结论为:直接光强检测方式下表面微波的最小可探测幅度值为0.4244mm。当表面微波幅度超过该值时,探测系统的灵敏度完全满足对水下声场的实时监测要求。In this paper, the minimum detectable amplitude of the microwave at water surface sensed by using a direct laser intensity detection method is derived and the relationships of this minimum detectable amplitude with detection height and receiving aperture axe analyzed. According to the perturbation phenomenon formed by the underwater acoustic field at water surface in the direct laser intensity detection method, theoretical calculation is carried out by establishing the one-dimensional physical model of the detection system. It is concluded that the minimum detectable amplitude of the microwave at water surface is 0.4244mm when the direct laser intensity detection method is used. If the amplitude of the microwave at water surface is greater than 0.4244mm, the detection system can meet the real-time monitoring requirement of the underwater acoustic field completely.

关 键 词：光学测量 最小可探测幅度值 理论推算 直接光强检测 

分 类 号：TN249[电子电信—物理电子学]