Using CO2 Lidar for Standoff Detection of a Perfluorocarbon Tracer in Air

.............................................................................................................................. 2 1.0 Summary....................................................................................................................... 2 2.0 Introduction................................................................................................................... 3 3.0 Lidar Background, System Design, Assembly and Optimization ................................ 3 3.1 Lidar Design ................................................................................................................. 5 3.2 Laboratory Testing........................................................................................................ 7 3.3 Indoor Testing............................................................................................................... 9 3.4 Outdoor Optimization ................................................................................................... 9 4.0 Demonstration Results and Discussion....................................................................... 14 4.1 Results......................................................................................................................... 14 5.0 Conclusions................................................................................................................. 16 6.0 Recommendations....................................................................................................... 16 7.0 References................................................................................................................... 18 Figure 1 Schematic of Typical Lidar System ..................................................................... 4 Figure 2 Differential Absorption Lidar............................................................................... 5 Figure 3 Lidar Platform used for PFT Detection (output side).................................6 Figure 4 Lidar Platform used for PFT Detection (collection side).............................6 Figure 5 Schematic of Lidar Platform used for Testing and Demonstration of PFT Detection in Air.......................................................................................7 Figure 6 Laboratory Apparatus used in Calibrating PFT Lidar.................................8 Figure 7 Lidar Test Facility showing Beam Path ............................................................. 10 Figure 8 CONOPS for Standoff Detection of PFTs ............................................11 Figure 9 Graphical Interface for PFT Lidar......................................................12 Figure 10 Results of Outdoor Testing of Lidar................................................................. 13 Figure 11 Lidar Field Demonstration Set up .................................................................... 14 Figure 12 Lidar Output for the August 27th Demonstration of Stand-off detection of PFTs ..................................................................................................15 Figure 13 Dual Wavelength (dual laser) Lidar for PFT Stand-off Detection .............17 Figure 14 Off Axis Optical Lidar Configuration versus Standard Lidar Configuration... 17