7 October 2014 Stand-off detection and classification of CBRNe using a Lidar system based on a high power femtosecond laser
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Abstract
We propose a stand-off system that enables detection and classification of CBRNe (Chemical, Biological, Radioactive, Nuclear aerosol and explosive solids). The system is an integrated lidar using a high-power (terawatt) femtosecond laser. The detection and classification of various hazardous targets with stand-off distances from several hundred meters to a few kilometers are achieved by means of laser-induced breakdown spectroscopy (LIBS) and two-photon fluorescence (TPF) techniques. In this work, we report on the technical considerations on the system design of the present hybrid lidar system consisting of a nanosecond laser and a femtosecond laser. Also, we describe the current progress in our laboratory experiments that have demonstrated the stand-off detection and classification of various simulants. For the R and N detection scheme, cesium chloride aerosols have successfully been detected by LIBS using a high-power femtosecond laser. For the B detection scheme, TPF signals of organic aerosols such as riboflavin have clearly been recorded. In addition, a compact femtosecond laser has been employed for the LIBS classification of organic plastics employed as e-simulants.
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Jun Izawa, Takeshi Yokozawa, Takao Kurata, Akihiro Yoshida, Yasushi Mastunaga, Toshihiro Somekawa, Shuzo Eto, Naohiro Manago, Hideyuki Horisawa, Shigeru Yamaguchi, Takashi Fujii, Hiroaki Kuze, "Stand-off detection and classification of CBRNe using a Lidar system based on a high power femtosecond laser", Proc. SPIE 9253, Optics and Photonics for Counterterrorism, Crime Fighting, and Defence X; and Optical Materials and Biomaterials in Security and Defence Systems Technology XI, 92530C (7 October 2014); doi: 10.1117/12.2067005; https://doi.org/10.1117/12.2067005
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