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Título: | Shielding of optical pulses on hydrodynamical time scales in laser-induced breakdown of saline water |
Autor: | Conti, Daniel CSIC; Marino, Francesco CSIC ORCID; Roati, Giacomo; Orfila, Alejandro CSIC ORCID ; Javaloyes, Julien CSIC ORCID; Piro, Oreste CSIC ORCID; Balle, Salvador CSIC ORCID | Fecha de publicación: | 17-jul-2014 | Editor: | American Institute of Physics | Citación: | Journal of Applied Physics 116(3): 033102 (2014) | Resumen: | Pulse shielding in Laser-Induced Breakdown of saline water on hydrodynamic time scales is experimentally characterized. Pairs of pulses from a Nd:YAG laser are focused into saline water with a controlled time delay between them. The Laser-Induced Breakdown produced by the first pulse creates a cavitation bubble that later collapses generating a plume of bubbles that evolves on hydrodynamic time scales. When the second pulse arrives, the light is scattered by this plume with a consequent reduction in the intensity at the focal spot resulting in a lower breakdown efficiency of this pulse. By means of acoustic measurements, we determine the breakdown energy threshold for the first pulse and characterize the shielding of the second pulse as a function of the salinity of the solution, the energy of the pulse, and the inter-pulse interval. A model for the blocking process that takes into account both linear and nonlinear absorption along the path is developed which satisfactorily explains the observations. © 2014 AIP Publishing LLC. | Versión del editor: | http://dx.doi.org/10.1063/1.4890313 | URI: | http://hdl.handle.net/10261/115337 | DOI: | 10.1063/1.4890313 | Identificadores: | doi: 10.1063/1.4890313 issn: 1089-7550 |
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Conti-D-Journal-Applied-Physics-2014-v116-033102.pdf | 1,81 MB | Adobe PDF | Visualizar/Abrir |
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