V.A. Boykov - Post-graduate Student, "Laser and Optoelectronic Systems" Department, Bauman Moscow State Technical University. E-mail: bazzilio215@rambler.ru V.Ya. Kolyuchkin - Dr.Sc. (Eng.), Professor, "Laser and Optoelectronic Systems" Department, Bauman Moscow State Technical University. E-mail: vkoluch@bmstu.ru