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提出了一种能在高海拔区域工作的相干光路的直接探测多普勒激光雷达系统。系统设计借鉴了相干测风激光雷达系统的光路,利用大气分子散射光进行风速测量,采用偏振分光棱镜和1/4波片组成光开关,配合收发合置的望远镜,简化了直接探测系统的光路,提高了光路稳定性;采用腔长固定式的标准具,脉冲激光器波长为可调谐,经优化,调谐范围约10GHz,完成了系统的仿真设计和设备选型工作。
A direct detection Doppler lidar system with coherent optical path that can work in high altitude area is proposed. The system design draws on the optical path of the coherent wind laser radar system, the use of atmospheric molecular scattered light for wind speed measurement, the use of polarizing beam splitter prism and 1/4 wave plate composed of optical switches, with the transceiver telescopes, simplifying the direct detection system optical path , Which improves the stability of the optical path. The etalon with fixed cavity length is used, the wavelength of the pulsed laser is tunable, the tuning range is about 10GHz, and the system simulation design and equipment selection are completed.