根据目标粗糙表面散射回波统计理论和随机相位匹配规则分析了相干激光雷达光学天线参数确定和本振光设计方法,研制了一套扫描激光雷达光学天线系统,并应用于单管线性调频脉冲压缩激光雷达接收到了7.8km外房屋的散射回波信号,信噪比较好,激光功率约为5W。

According to the charecteristics of the backscattered light from the rough surfaces of the target far away and the random phase matching rule, the method of coherent optical head coefficients designing is discussed. An optical system is developed that is an optical head of a coherent imaging CO2 laser radar with chirp pulse compression. In the experimental laser radar only one continuous wave single mode CO2 laser is used, and the signals from a building of 7.8 km away are obtained with acceptable SNR while the lase output is about 5 W.