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Atmospheric and Oceanic Optics

2017 year, number 12

Filamentation of an ultrashort laser pulse train in air

Yu.E. Geints, A.A. Zemlyanov
V.E. Zuev Institute of Atmospheric Optics of Siberian Branch of the Russian Academy of Science, 1, Academician Zuev square, Tomsk, 634021, Russia
Keywords: ультракороткое лазерное излучение, самофокусировка, лазерная филаментация, лазерная плазма, цуг импульсов, ultrashort laser radiation, pulse self-focusing, laser filamentation, laser plasma, pulse train


The results of numerical simulation of self-action in air of a sequence of ultrashort laser pulses with a carrier in the near and mid-IR regions are presented. We show that the use of a 10.6-mm pulse train allows appreciable elongation of the plasma channel generated during pulse filamentation and enhancement of its spatial connectivity. The filamentation of a submicron pulse train does not visibly change the filamentation region characteristics.