1. Kazan E. K. Zavoisky Physical Technical Institute
2. Kazan 420029, Russian Federation
3. Institute of Spectroscopy RAS
4. Troitsk 142190, Russian Federation
5. Kazan Federal University
6. Kazan 420008, Russian Federation
7. St. Petersburg National Research University of Informational Technologies
8. Mechanics and Optics
9. St. Petersburg 197101, Russian Federation