Details

The objective of the qualification work was to model and measure the main characteristics of microwave photonic transmission links, including the use of single-mode, few-mode and multi-mode fiber optic cables. To achieve this objective, the following tasks were completed: •Develop a mathematical model of signal propagation in microwave photonic transmission links. •Simulation of electromagnetic field mode propagation in various types of optical fiber. •Conduct experimental studies of microwave photonic transmission links and compare them with the results of theoretical. A numerical experiment on optical signal transmission through single-mode and few-mode fiber was conducted using the COMSOL Multiphysics integrated development environment. The electromagnetic field mode composition was determined for Corning SMF 28e, Corning MMF 50/125 OM3, and YOFC FMF FM SI-4 optical fibers. The optical power distribution at the input and output ports and the S21 parameter were calculated for these fiber types. A laboratory test setup was developed, and experimental studies were conducted on a microwave photonic transmission link consisting of single-mode, few-mode, and multimode fiber of varying lengths. The S-parameters of the transmission link were measured, and its nonlinear properties were investigated. Results obtained from theoretical calculations in mathematical software packages, simulation results from the COMSOL Multiphysics, and data from our experimental measurements show good agreement. The research was carried out in the "Microwave Photonics" research group at the Higher School of Applied Physics and Space Technologies, SpbPU.