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

该小型企业创新研究第一阶段项目旨在解决提高大气水蒸气、温度和压力分布观测精度的需求，以便更好地为天气预报建立大气模型。这可以使用水分子在1.9？m处的差动吸收激光雷达(DIAL)和窄带宽(约50 MHz)、可调谐的红外半导体激光器作为注入种子到调Q的固态激光器来实现。作为研制该激光仪器的第一步，将研究使用固体放大器在1.85？m到1.95？m范围内对可调谐的DFB半导体激光器进行脉冲放大。此外，还将研究适合于精确温度测量的固体激光增益分布与水吸收旋转线的重叠。除了用于利用1.9？m水吸收波段获得大气水汽、温度和压力分布的测量外，半导体激光播种还将是对目前用于2.01？m多普勒激光雷达测风的激光技术的改进，后者不可调谐，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.