Plasma channels characteristics dependence on tightly focused femtosecond laser radiation parameters
conference on lasers and electro optics（2005）
Abstract
Tight focusing of femtosecond laser radiation with microjoule pulse energy in non-linear crystal volume (intensity of the order of 10 W/cm2) causes self-focusing, multiphoton ionization of the matter, plasma channel formation, electrons heating, and subsequent micromodification of the structure. The processes threshold, behavior and efficiency strongly depend on such laser pulse parameters as pulse duration, energy and radiation wavelength
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Key words
second harmonic generation,femtosecond laser,self focusing,pulse duration,plasma diagnostics,electrons
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