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DIRECTED
ENERGY
PROFESSIONAL
SOCIETY
Abstract: 25-Systems-013
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UNCLASSIFIED, PUBLIC RELEASE
Effects of Laser Pulse Widths on Penetration and Shattering of Ceramic Tiles and Drones for Lethality
Laser pulse width critically governs penetration and shattering behaviors in ceramics, composite structures, and other materials with direct implications for destabilizing and neutralizing drones and other high-speed systems. In this study, a high-repetition-rate burst-mode laser with a fixed burst energy of 1 kJ was employed to investigate penetration depth, fracture dynamics in ceramic plates, and drilling through drone bodies and battery packs. Pulse widths were varied from 10 ns to 10 ms, with beam diameters ranging from 3 mm to 12 mm. As the beam size increased toward 12 mm, the penetration efficiency of long-pulse/CW irradiation decreased significantly, while the relative effectiveness of short-pulse-induced shattering remained prominent. This systematic study defines the trade space between pulse width, beam diameter, and lethality mechanism, confirming that even though long-pulse can penetrate in certain conditions, pulse train with short pulsewidth have displayed superior shattering features in ceramics and penetration in drones. These findings provide a physics-based framework for optimizing pulsed laser lethality against drones and high-speed systems.
UNCLASSIFIED, PUBLIC RELEASE
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