1. Gdansk University of Technology, Faculty of Electronics, Telecommunications and Informatics, Department of Metrology and Optoelectronics, Gabriela Narutowicza Street 11/12, 80-233 Gdansk, Poland
2. University of Oulu, Faculty of Information Technology and Electrical Engineering, Optoelectronics and Measurement Techniques Laboratory, P.O. Box 4500, Oulu 90014, Finland
3. University of Oulu, Faculty of Information Technology and Electrical Engineering, Optoelectronics and Measurement Techniques Laboratory, P.O. Box 4500, Oulu 90014, FinlandcSaratov State University, Research-Educational Institute of Optics and Biophotonics