Ma Jian, Lu Tingting, He Yan, Jiang Zhengyang, Hou Chunhe, Li Kaipeng, Liu Fanghua, Zhu Xiaolei, Chen Weibiao
Appl Opt. 2020 Apr 1;59(10):C87-C91. doi: 10.1364/AO.382174.
We have demonstrated a dual-wavelength blue-green laser for airborne ocean lidar based on an all-solid-state master oscillator power amplifier and nonlinear frequency conversion methods. A -switched pulsed laser with 10 mJ energy at 1064 nm was amplified to 108 mJ by a Nd:YAG amplifier side pumped by vertical-cavity surface-emitting laser modules. This fundamental laser was then frequency tripled to 355 nm wavelength by lithium triborate (LBO) crystals. With maximum pump energy of 43.5 mJ at 355 nm, 9.6 mJ of blue laser pulse at 486.1 nm was successfully obtained from an optical parametric oscillator unit using two beta-barium borate crystals. The energy of the residual 532 nm laser pulse was 10.6 mJ. Equipped with this laser system, an airborne blue-green lidar was developed, and ocean detection was carried out in the South China Sea, where an optical vertical profile at seawater depth of 94 m was obtained.
我们基于全固态主振荡功率放大器和非线性频率转换方法，展示了一种用于机载海洋激光雷达的双波长蓝绿激光器。一个在1064nm波长处能量为10mJ的调Q脉冲激光器被垂直腔面发射激光模块侧面泵浦的Nd:YAG放大器放大至108mJ。然后，通过三硼酸锂（LBO）晶体将该基频激光三倍频至355nm波长。在355nm波长处最大泵浦能量为43.5mJ时，使用两块偏硼酸钡晶体从光学参量振荡器单元成功获得了486.1nm波长处9.6mJ的蓝光激光脉冲。剩余532nm激光脉冲的能量为10.6mJ。配备该激光系统后，研制了一台机载蓝绿激光雷达，并在中国南海进行了海洋探测，获得了94m海水深度处的光学垂直剖面。
