Generation of Color Centers and Laser Plasma in LiF during Multipulse Filamentation
A. V. Kuznetsova,*, V. O. Kompanetsb, A. E. Dormidonovb, S. V. Chekalinb, and V. P. Kandidovb,c
a Irkutsk Branch of Institute of Laser Physics, Siberian Branch, Russian Academy of Sciences, Irkutsk, 664033 Russia
b Institute of Spectroscopy, Russian Academy Sciences, Troitsk, >Moscow, 108840 Russia
c Faculty of Physics, Moscow State University, Moscow, 119991 Russia
Correspondence to: * e-mail: a.v.kuznetsov@bk.ru
Received 23 July, 2022
Abstract—The generation dynamics of plasma and color centers in a LiF crystal under conditions of multipulse filamentation by mid-IR femtosecond laser radiation has been experimentally and numerically investigated. A model describing the dynamic competition between the excitonic and electron–hole channels during saturation of the concentration of color centers (CCs) in LiF under exposure to multipulse femtosecond radiation is developed. The competition between the excitonic and electron–hole channels of CC generation is physically interpreted.
DOI: 10.1134/S1063776122120056