Differential Absorption Lidar (DIAL) Using a Broadly TunableCr:LiSAF Laser

390nm到3.5 um的可调谐相干光源有很多应用，但在这个区域没有可调谐激光源，也很少有离散激光线。通过使用钛蓝宝石激光器和频率加倍，有有限的可调性，但这种方法的缺点是转换效率差，尺寸和重量大。在第一阶段的研究中，Schwartz Electro- Optics, Inc. （SEO）提出了一种工作在0.78-1.0 um的Cr:LiSAF激光器，作为光参量振荡器（OPO）和二次谐波发生器（SHG）的泵浦激光器，用于产生0.39-3.5 um可调谐源。SEO生产高功率手电筒泵浦调q Cr:LiSAF激光器（型号激光1-2-3）。在这项研究中，该项目将免费使用该激光器。将评估用激光二极管泵送Cr:LiSAF的概念，以减小激光器的尺寸和重量并提高可靠性。在第二阶段计划中，二极管泵浦，全固态，宽可调谐激光源将用于遥感DIAL系统的设计，制造和测试。*** .

9361077 Achaerkar There are many applications for a tunable coherent 390 nm to 3.5 um source but there are no tunable laser sources and very few discrete laser lines in this region. By using a titanium sapphire laser and frequency doubling there is limited tunability but this approach suffers for poor conversion efficiency, large size and weight. In this Phase I study, Schwartz Electro- Optics, Inc. (SEO) proposes a Cr:LiSAF laser operating at 0.78-1.0 um as a pump laser for an Optical Parametric Oscillator (OPO) and a Second Harmonic Generator (SHG) for the generation of 0.39-3.5 um tunable source. SEO manufactures a high power flashlamp pumped Q-switched Cr:LiSAF laser (model Laser 1-2-3). For this study this laser will be used at no cost to the program. The concept of pumping Cr:LiSAF with a laser diode to reduce laser size and weight and improve reliability will be evaluated. In Phase II program, the diode pumped, all solid state, broadly tunable laser source will be used in the desiqn, fabrication, and test of a DIAL system for remote sensing. *** .