Ground-based differential absorption lidar for water-vapor and temperature profiling: development and specifications of a high-performance laser transmitter.
Ground-based differential absorption lidar for water-vapor and temperature profiling: development and specifications of a high-performance laser transmitter.
复制标题
用于水蒸气和温度分析的地基差分吸收激光雷达：高性能激光发射器的开发和规格。
作者：
Volker Wulfmeyer
介绍了一种用于近红外水汽和温度差分吸收激光雷达（DIAL）系统的全固态激光发射机。激光系统基于主从配置。作为从激光器的Q开关单向紫翠宝石环形激光器，这是注入种子的主激光器，连续钛宝石环形激光器。据我所知，该激光系统具有最高的频率稳定度（15 MHz rms），最窄的带宽（<40 MHz）和最高的光谱纯度（>99.99%）的所有激光发射机的近红外。这些规格满足水蒸气测量的要求，激光特性引起的误差<5%，整个对流层的激光特性引起的误差<1 K的温度测量。在现场长期运行期间保持质量标准。该激光系统的单模操作使得DIAL反向散射信号的窄带检测成为可能。因此，该系统有可能被用于精确的温度测量和同时DIAL和多普勒风测量。
An all-solid-state laser transmitter for a water-vapor and temperature differential absorption lidar (DIAL) system in the near infrared is introduced. The laser system is based on a master-slave configuration. As the slave laser a Q-switched unidirectional alexandrite ring laser is used, which is injection seeded by the master laser, a cw Ti:sapphire ring laser. It is demonstrated that this laser system has, what is to my knowledge, the highest frequency stability (15 MHz rms), narrowest bandwidth (<40 MHz), and highest spectral purity (>99.99%) of all the laser transmitters developed to date in the near infrared. These specifications fulfill the requirements for water-vapor measurements with an error caused by laser properties of <5% and temperature measurements with an error caused by laser properties of <1 K in the whole troposphere. The specifications are maintained during long-term operation in the field. The single-mode operation of this laser system makes the narrow-band detection of the DIAL backscatter signal possible. Thus the system has the potential to be used for accurate temperature measurements and for simultaneous DIAL and Doppler wind measurements.