Journal
APPLIED PHYSICS EXPRESS
Volume 6, Issue 12, Pages -Publisher
IOP PUBLISHING LTD
DOI: 10.7567/APEX.6.122701
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Funding
- Japan Society for the Promotion of Science [22360060]
- Amada Foundation for Metal Work Technology [AF-2009217]
- 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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