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Ultrafast imaging of transient electronic plasmas produced in conditions of femtosecond waveguide writing in dielectrics

AuthorsGawelda, W.; Puerto, D. ; Siegel, Jan ; Ferrer, Andrés; Ruiz de la Cruz, A.; Fernández Martínez, Héctor ; Solís Céspedes, Javier
Issue Date24-Sep-2008
PublisherAmerican Institute of Physics
CitationApplied Physics Letters 93(12): 121109 (2008)
AbstractFemtosecond laser-induced plasmas in bulk dielectrics are imaged under waveguide writing conditions, for different polarizations, pulse durations, and processing depths, and their temporal evolution is measured using ultrafast pump-probe microscopy. The irradiation beam profile is elliptically shaped yielding a disklike focal volume. We demonstrate for doped phosphate glass that increasing the pulse duration improves the spatial distribution of deposited energy by minimizing beam filamentation and prefocal depletion effects. As a consequence, energy deposition in the desired volume is greatly enhanced. Our results identify key parameters for optimizing femtosecond laser processing of dielectrics and different strategies to minimize energy loss channels.
Description3 pages, 4 figures.
Publisher version (URL)http://dx.doi.org/10.1063/1.2988275
Appears in Collections:(CFMAC-IO) Artículos
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