A Compact, Solid State, Pulsed Laser Continuously Tunable at 2 Microns For Atmospheric Monitoring

这个小企业创新研究第一阶段项目解决了提高大气水蒸气，温度和压力分布观测精度的需求，以更好地模拟天气预报的大气。这可以通过使用1.9？m处的水分子差分吸收激光雷达（DIAL）来实现，其带宽很窄（约1.5 nm）。50 MHz）的可调谐红外二极管激光器作为Q开关固态激光器的注入种子。作为研制这种激光仪器的第一步，我们将研究利用固态放大器对1.85 ~ 1.95 μ m可调谐DFB半导体激光器的脉冲放大。此外，将研究固态激光器增益分布与水吸收旋转线的重叠，适用于精确的温度测量。除了使用1.9？m水吸收带获得大气水蒸气、温度和压力廓线测量外，二极管激光播种将是对当前用于2.01？m多普勒激光雷达风测量的激光技术的改进，该技术不可调谐，需要复杂的环形激光器作为注入种子。

This Small Business Innovation Research Phase I project addresses the need for improved accuracy in the observation of atmospheric water vapor, temperature, and pressure profiles to permit better modeling of the atmosphere for weather forecasting. This can be accomplished using Differential Absorption LIDAR (DIAL) of water molecules at 1.9 ªm with a narrow bandwidth (ca. 50 MHz), tunable infrared diode laser as an injection seed to a Q-switched, solid state laser. As the first step in the development of this laser instrumentation, pulse amplification of a tunable DFB diode laser over the range from 1.85 ªm to 1.95 ªm using a solid state amplifier will be investigated. In addition, overlap of the solid state laser gain profile with water absorption rotational lines suitable for accurate temperature measurements will be investigated. In addition to use for obtaining atmospheric water vapor, temperature, and pressure profile measurements using the 1.9 ªm water absorption band, the diode laser seeding will be an improvement over the current laser technology for use in Doppler LIDAR wind measurements operating at 2.01 ªm, which are not tunable and require an intricate ring laser as the injection seed.