Dynamic of structure of multiple filamentation domain of laser pulses in the glass
D.V. Apeksimov1, S.S. Golik2,3, A.A. Zemlyanov1, A.M. Kabanov1, A.Yu. Mayor2, A.V. Petrov1
1V.E. Zuev Institute of Atmospheric Optics of Siberian Branch of the Russian Academy of Science, 1, Academician Zuev square, Tomsk, 634021, Russia
2Institute of Automation and Control Prosesses Far Easten Branch of the Russian Academy of Science, 5, Radio Street, Vladivostok, 690041
3Far Eastern Federal University, 8, Suhanova St., Vladivostok, 690950, Russia
Keywords: лазерное излучение, фемтосекундный импульс, самофокусировка, множественная филаментация, стекло, laser radiation, femtosecond pulse, self-focusing, multiple filamentation, glass
Abstract
The results of experiments on the study of the spatial characteristics of the multiple filamentation domain of Ti:Sapphire laser gigawatt pulses in glass are presented. The dependences of the coordinates of the beginning, the end, the diameter of the multiple filamentation domain (MFD) vs the laser pulse energy is obtained. It was found that when the average intensity in the beam reaches specific values, MFD is formed near the illuminated side of the glass sample. It is shown that when the threshold intensity of the beam is reached, secondary multiple filamentation domain is formed. The spatial characteristics of MFD depend on the time of influence of pulse-periodoc laser radiation. The diameter of the secondary multiple MFD and coordinates of its start depend on the exposure time. No dependence of the spatial characteristics of the primary MFD on the exposure time was revealed during the experiments.
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