Yu. G. Belov - Dr.Sc. (Eng.), Professor of Department of Physics and Technology of Optical Communication, Nizhny Novgorod State Technical University n.a. R.E. Alekseev. E-mail: trt@nntu.nnov.ru
M. Yu. Zvezdova - Engineer, JSC «GIPROGAZCENTR». E-mail: mariazv@yandex.ru
K. I. Kisilenko - Undergraduate, Electronics and Information Technology Institute, Nizhny Novgorod State Technical University n.a. R.E. Alekseev. E-mail: physics@nntu.nnov.ru
B. Yu. Tsarev - Undergraduate, Electronics and Information Technology Institute, Nizhny Novgorod State Technical University n.a. R.E. Alekseev. E-mail: yourich_nec@mail.ru