A.P. Ratushin, E.I. Balunin, A.Y. Barinov

T.T. Lam - Post-graduate Student, Moscow Institute of Physics and Technology (State University). E-mail: tangthanhlam@gmail.com

D.P. Tabakov - Ph. D. (Phys.-Math.), Associate Professor, Department of Bases of Construction and Tecnologies of Radiotechnical Systems, Volga State University of Telecommunications and Informatics (Samara). E-mail: illuminator84@yandex.ru