Origin of the damage ring pattern in fused silica induced by multiple longitudinal modes laser pulses

Ring patterns surrounding laser damage sites at the exit surface of fused silica are systematically observed when initiated by multiple longitudinal modes nanosecond laser pulses at 1064 nm. The appearance chronology of rings is found to be closely related to the temporal shape of the laser pulses....

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Bibliographic Details
Published in:Applied physics letters 2014-01, Vol.104 (2), p.21121
Main Authors: Chambonneau, M., Diaz, R., Grua, P., Rullier, J.-L., Duchateau, G., Natoli, J.-Y., Lamaignère, L.
Format: Article
Language:English
Subjects:
Ablation
Applied physics
Chronology
Damage patterns
Detonation waves
Fused silica
Laser damage
Lasers
Morphology
Optics
Physics
Silicon dioxide
Wave propagation
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Summary:Ring patterns surrounding laser damage sites at the exit surface of fused silica are systematically observed when initiated by multiple longitudinal modes nanosecond laser pulses at 1064 nm. The appearance chronology of rings is found to be closely related to the temporal shape of the laser pulses. This supports that the damage morphology originates from the coupling of a laser-supported detonation wave propagating in air with an ablation mechanism in silica. In our experiments, the propagation speed of the detonation wave reaches about 20 km/s and scales as the cube root of the laser intensity, in good agreement with theory.
ISSN:0003-6951
1077-3118
DOI:10.1063/1.4861748