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30 May 2022 High altitude filament propagation
LaShae Smith, Jessica Pena, Danielle Reyes, Martin Richardson
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Proceedings Volume PC12092, Laser Technology for Defense and Security XVII; PC120920I (2022) https://doi.org/10.1117/12.2626979
Event: SPIE Defense + Commercial Sensing, 2022, Orlando, Florida, United States
Abstract
Filaments, formed by ultrashort pulsed laser (USPLs) with high peak powers, deliver high intensities and a plasma channel to km-scale distance, without the need for focusing elements. These properties make them viable for long-range outdoor applications, including propagation to or at high altitudes where air pressure is a fraction of that at sea level. Since filament formation and characteristics are known to vary with air pressure, here, we analyze how critical filamentation thresholds and properties change as pressure decreases, through experiment and simulation. This study indicates that filament applications are indeed feasible over long distances to or at high altitudes.
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LaShae Smith, Jessica Pena, Danielle Reyes, and Martin Richardson "High altitude filament propagation", Proc. SPIE PC12092, Laser Technology for Defense and Security XVII, PC120920I (30 May 2022); https://doi.org/10.1117/12.2626979
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KEYWORDS
Laser cutting
Laser applications
Plasma
Pulsed laser operation
Clouds
Laser beam propagation
LIDAR
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