4.5 Article

Influences of Focusing Conditions on Dynamics of Laser Ablation at a Solid-Liquid Interface

Journal

APPLIED PHYSICS EXPRESS
Volume 6, Issue 12, Pages -

Publisher

IOP PUBLISHING LTD
DOI: 10.7567/APEX.6.122701

Keywords

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Funding

  1. Japan Society for the Promotion of Science [22360060]
  2. Amada Foundation for Metal Work Technology [AF-2009217]
  3. Grants-in-Aid for Scientific Research [22360060] Funding Source: KAKEN

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Influences of focusing conditions relative to a sample surface on shock processes in under-liquid laser-induced ablation were studied using a custom-designed time-resolved photoelasticity imaging technique. A nanosecond laser pulse was focused onto the surface of epoxy-resin blocks immersed in liquids. When the surface was located close to the focal point, the breakdown that occurred on the solid-liquid interface resulted in reduced laser-induced stress. At positions above the focal point, the stress-wave intensity was mainly determined by laser pulse energy, but not by fluence. Impurities in liquids initiated breakdowns at multiple sites along the light path and reduced stress-wave intensity. (C) 2013 The Japan Society of Applied Physics

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