V.E. Ustimchik - Post-graduate Student, Moscow Institute of Physics and Technology, Engineer, Kotelnikov IRE RAS. E-mail: ustimchikv@gmail.com Yu.K. Chamorovskii - Ph.D. (Phys.-Math.), Leading Researcher, Kotelnikov IRE RAS V.N. Filippov - Ph.D. (Phys.-Math.), Researcher, Optoelectronic Research Center, Tampere University of Technology, Finland S.A. Nikitov - Dr.Sc. (Phys.-Math.), Corresponding Member of RAS, Acting Director, Head of laboratory, Kotelnikov IRE RAS