V. V. Biryukov - Ph.D. (Eng.), Associate Professor of Department of Physics and Technology of Optical Communication, Institute of Nuclear Energy and Technical Physics, Nizhny Novgorod State Technical University n.a. R.E. Alekseev. E-mail: physics@nntu.nnov.ru
V. A. Grachev - Postgraduate Student, Department of Physics and Technology of Optical Communication, Institute of Nuclear Energy and Technical Physics, Nizhny Novgorod State Technical University n.a. R.E. Alekseev
A. S. Raevskij - Dr.Sc. (Phys.-Math.), Professor, Head of Department of Physics and Technology of Optical Communication, Institute of Nuclear Energy and Technical Physics, Nizhny Novgorod State Technical University n.a. R.E. Alekseev
V. V. Shcherbakov - Ph.D. (Eng.), Associate Professor of Department of Physics and Technology of Optical Communication, Institute of Nuclear Energy and Technical Physics, Nizhny Novgorod State Technical University n.a. R.E. Alekseev