摘要
根据全光纤激光雷达特性设计与优化发射和接收光学系统。针对全光纤激光雷达光学系统中的激光高斯传输特性、扩展目标特性和光纤收发特性,修正激光雷达方程中的发射天线增益和目标反射截面,引入光纤接收效率参数。修正后的发射天线增益与目标处光斑大小的平方成反比,漫反射目标的雷达反射截面取决于目标反射率和激光入射角。实验探究了回波功率与接收光纤芯径的关系,得到了最佳光纤芯径。修正后的激光雷达方程可准确计算光纤收发条件下激光的回波功率,为后续的信号处理提供精确的理论支持。
According to the characteristics of the all-fiber lidar,the transmitting and the receiving optical systems are designed and optimized.Aiming at the characteristics of the laser Gauss transmission,the extended target and the optical fiber transceiver of the all-fiber lidar optical system,the transmitting antenna gain and the target reflection cross-section in the lidar equation are modified,and the fiber reception efficiency is introduced.The modified transmitting antenna gain is inversely proportional to the square of the target spot size.The radar reflection cross-section of the diffuse reflection target depends on the target reflectivity and the laser incidence angle.The relationship between the echo power and the core diameter of the reception fiber is explored in experiment,and the optimum fiber core diameter is obtained.The modified lidar equation can calculate the laser echo power from the optical fiber transceiver accurately and provide precise theoretical support for subsequent signal processing.
出处
《光学学报》
EI
CAS
CSCD
北大核心
2016年第11期58-65,共8页
Acta Optica Sinica
基金
国家自然科学基金(61308054)
