Emission of molecular nitrogen at tight focusing of femtosecond laser pulses in air
A numerical model describing the dynamics of plasma particle density upon filamentation of femtosecond radiation in the air is presented. The simulation results are in good agreement with the experimental data. The pumping processes of the N2 and N2+ radiative levels are investigated. The model predicts a sharp drop in electron temperature and density within 1 ns. For the first positive nitrogen system, an excess of the population of the upper radiation level over the population of the lower one is observed for 550 ps.
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Keywords
filament, nitrogen molecule emission, femtosecond laser radiationAuthors
| Name | Organization | |
| Ilyin A.A. | Institute of Automation and Control Processes of Far Eastern Branch of Russian Academy of Sciences; Far Eastern Federal University | triplecks@mail.ru |
| Shmirko K.A. | Institute of Automation and Control Processes of Far Eastern Branch of Russian Academy of Sciences; Far Eastern Federal University | shmirko.konstantin@gmail.com |
| Golik S.S. | Institute of Automation and Control Processes of Far Eastern Branch of Russian Academy of Sciences; Far Eastern Federal University | golik_s@mail.ru |
| Proschenko D.Yu. | Far Eastern Federal University; Admiral Nevelskoy Maritime State University | dima.prsk@mail.ru |
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