Influence of pulse duration on ultrashort laser pulse ablation of biological tissues.
Ablation characteristics of ultrashort laser pulses were investigated for pulse durations in the range of 130 fs-10 ps. Tissue samples used in the study were dental hard tissue (dentin) and water. We observed differences in ablation crater morphology for craters generated with pulse durations in the 130 fs-1 ps and the 5 ps-10 ps range. For the water experiment, the surface ablation and subsequent propagation of stress waves were monitored using Mach-Zehnder interferometry. For 130 fs-1 ps, energy is deposited on the surface while for longer pulses the beam penetrates into the sample. Both studies indicate that a transition occurs between 1 and 5 ps.
Kim
B M
BM
Yonsei University, Department of Biomedical Engineering, 234 Maeji, Heungup, Wonjoo, Kangwon-Do, 220-710 Korea. beopmkim@dragon.yonsei.ac.kr
Feit
M D
MD
Rubenchik
A M
AM
Joslin
E J
EJ
Celliers
P M
PM
Eichler
J
J
Da Silva
L B
LB
D004056:Differential Threshold; D006801:Humans; D066298:In Vitro Techniques; D007368:Interferometry; D053685:Laser Therapy; D007834:Lasers; D013997:Time Factors; D014070:Tooth / Q000473:pathology / Q000601:surgery*; D014867:Water
D014867:Water