Journal
MEASUREMENT SCIENCE AND TECHNOLOGY
Volume 12, Issue 11, Pages 1784-1794Publisher
IOP PUBLISHING LTD
DOI: 10.1088/0957-0233/12/11/305
Keywords
laser-induced breakdown; damage threshold; femtosecond laser; laser micromachining; optical damage
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Laser-induced breakdown and damage to transparent materials has remained an active area of research for four decades. In this paper we review the basic mechanisms that lead to laser-induced breakdown and damage and present a summary of some open questions in the field. We present a method for measuring the threshold intensity required to produce breakdown and damage in the bulk, as opposed to on the surface, of the material. Using this technique, we measure the material band-gap and laser-wavelength dependence of the threshold intensity for bulk damage using femtosecond laser pulses. Based on these thresholds, we determine the relative role of different nonlinear ionization mechanisms for different laser and material parameters.
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