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AUTHOR(S): Ana-Maria Bratu, Cristina Popa, Mioara Petrus, Mihaela Bojan
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ABSTRACT Over time, the growing danger posed by improvised explosive devices (IEDs) has prompted endeavors to create sensitive detection techniques capable of foreseeing, detecting, and safeguarding against such makeshift assaults. Laser technologies have advanced significantly in defense strategies. Laser-based spectroscopic techniques offer swift and precise detection of chemicals in improvised explosives; however, no singular method can detect every component of all explosives. This study employs two spectroscopic methods to sensitively identify eight explosive chemical substances in both powder and vapor forms. The absorption spectra of benzene, toluene, acetone, and ethylene glycol were analyzed using CO2 laser photoacoustic spectroscopy. The photoacoustic signals of the samples were captured within the CO2 laser emission spectrum spanning from 9.2 to 10.8 µm, revealing distinct spectral behaviors for each substance under analysis. Time-domain spectroscopy employing THz radiation was utilized to examine transmission spectra of ammonium nitrate, potassium chlorate, dinitrobenzene, and hexamethylene teramine within the 0.1-3 THz range, revealing characteristic THz fingerprint spectra for each compound. Both CO2 laser photoacoustic spectroscopy and THz time-domain spectroscopy have demonstrated their effectiveness in identifying explosive constituents. The integration of these spectroscopic techniques represents an innovative and promising approach for detecting a wide array of IED components. |
KEYWORDS laser, infrared, terahertz, spectroscopy, chemical identification, explosive agents, security |
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Cite this paper Ana-Maria Bratu, Cristina Popa, Mioara Petrus, Mihaela Bojan. (2024) Engineering Laser Systems for Defence Applications. International Journal of Control Systems and Robotics, 9, 1-4 |
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