Picosecond high-repetition-rate pulsed laser ablation of dielectrics: the effect of energy accumulation between pulses

Barry Luther-Davies; Andrei V. Rode; Nathan R. Madsen; Eugene G. Gamaly

doi:10.1117/1.1905363

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1 May 2005 Picosecond high-repetition-rate pulsed laser ablation of dielectrics: the effect of energy accumulation between pulses

Barry Luther-Davies, Andrei V. Rode, Nathan R. Madsen, Eugene G. Gamaly

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Optical Engineering, 44(5), 051102 (2005). https://doi.org/10.1117/1.1905363

Abstract

We report experiments on the ablation of arsenic trisulphide and silicon using high-repetition-rate (megahertz) trains of picosecond pulses. In the case of arsenic trisulphide, the average single pulse fluence at ablation threshold is found to be >100 times lower when pulses are delivered as a 76-MHz train compared with the case of a solitary pulse. For silicon, however, the threshold for a 4.1-MHz train equals the value for a solitary pulse. A model of irradiation by high-repetition-rate pulse trains demonstrates that for arsenic trisulphide energy accumulates in the target surface from several hundred successive pulses, lowering the ablation threshold and causing a change from the laser-solid to laser-plasma mode as the surface temperature increases.

©(2005) Society of Photo-Optical Instrumentation Engineers (SPIE)

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Barry Luther-Davies, Andrei V. Rode, Nathan R. Madsen, and Eugene G. Gamaly "Picosecond high-repetition-rate pulsed laser ablation of dielectrics: the effect of energy accumulation between pulses," Optical Engineering 44(5), 051102 (1 May 2005). https://doi.org/10.1117/1.1905363

Published: 1 May 2005

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