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11 April 2024 Comparison of material interactions by nanosecond pulses and gigahertz bursts of filamenting femtosecond pulses
Owen Thome, Martin Richardson, Haley Kerrigan, Danielle Reyes
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Proceedings Volume PC12939, High-Power Laser Ablation VIII; PC129391H (2024) https://doi.org/10.1117/12.3008155
Event: SPIE High-Power Laser Ablation, 2024, Santa Fe, New Mexico, United States
Abstract
High energy ultrashort pulses can generate filaments during propagation, plasma channels which balance self-focusing to allow laser light propagation at a clamped diameter and intensities exceeding 10^13 W/cm^2 for many times the Rayleigh length. These filaments are attractive options for laser ablation at a distance but are limited in the total energy that can be delivered to a single point on target. In this work, temporally structuring femtosecond pulses into gigahertz bursts of spatially overlapped filaments lead to an increase in ablation. Material-interaction effects are compared between these nanosecond duration bursts of femtosecond pulses and traditional nanosecond pulses of similar total energy and duration in both aluminum and silicon targets.
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Owen Thome, Martin Richardson, Haley Kerrigan, and Danielle Reyes "Comparison of material interactions by nanosecond pulses and gigahertz bursts of filamenting femtosecond pulses", Proc. SPIE PC12939, High-Power Laser Ablation VIII, PC129391H (11 April 2024); https://doi.org/10.1117/12.3008155
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KEYWORDS
Ultrafast phenomena
Femtosecond pulse shaping
Femtosecond phenomena
Plasma
Atmospheric propagation
Laser ablation
High power lasers
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