Open AccessNanosecond laser coupling for increased filament ablation
Author(s) -
Haley Kerrigan,
Shermineh Rostami Fairchild,
Martin Richardson
Publication year - 2019
Publication title -
optics letters/optics index
Language(s) - Uncategorized
Resource type - Journals
SCImago Journal Rank - 1.524
H-Index - 272
eISSN - 1071-2763
pISSN - 0146-9592
DOI - 10.1364/ol.44.002594
Subject(s) - ablation , protein filament , optics , materials science , laser , nanosecond , laser ablation , beam (structure) , coupling (piping) , pulse (music) , physics , engineering , metallurgy , composite material , aerospace engineering , detector
Laser filaments can project intensities sufficient to ablate materials at long ranges, but the clamping of a filament's intensity to ∼10 14 W/cm 2 limits the effective ablation of targets with which the laser pulses interact. We seek to identify regimes in which auxiliary radiation can be used to augment the ablation created by single filaments. In this work, the combination of an 800 nm, 50 fs beam at single filament intensity and a 1064 nm, 8 ns laser pulse is studied. The ablation of GaAs is quantitatively evaluated for varying interpulse delays. Under optimum conditions, an ∼threefold increase in the ablation is observed. The metrology and surface features of the resultant ablation craters are examined to gain insight on the mechanisms of ablation in the dual-pulse cases.