Study on the ultra-fine tuning method of a laser frequency at the sodium resonance line for the sodium lidar observation

本研究旨在建立钠(钠)激光雷达脉冲激光频率控制的核心技术。激光雷达发射机主要由两部分组成：脉冲激光器和连续波窄带激光注入播种系统。本研究利用1064/1319 nm频率可控连续激光器，对注入式播种机系统进行了研究。为了控制脉冲589 nm激光，对绝对种子激光的频率进行了监测和精确控制。通过在挪威的观察验证了该方法的有效性。所有系统运行良好，获得了极高质量的数据。

The purpose of this research is to establish a core technology controlling pulse laser frequency of a sodium (Na) lidar. The lidar transmitter mainly consists of two parts; Nd:YAG pulse lasers and its injection seeding system using continuous wave (cw) narrowband lasers. In this research, using 1064/1319 nm frequency controllable cw lasers, the researches concerning the injection seeder system have been done. In order to control the pulse 589 nm laser, the frequency of the absolute seed laser was monitored and precisely controlled. The validity was checked through the observation in Norway. All the system functioned very well and extremely high quality data was obtained.