Stable frequency and time transfer in optical network
Although optical networks are primarily used for data transmissions, they currently provide a suitable and perspective platform for other applications, including the transmission of a highly stable frequency and accurate time from atomic clocks to distances of up to thousands of kilometers. The advantage of the optical line is that it allows simultaneous bidirectional transmission in the same fiber and thus the interfering effects can be compensated for, as they apply equally in both directions. The used methods of time and frequency transmission work on different network layers, the most accurate of them on the link and physical layer. The student will have to get acquainted in detail with existing methods, measure and evaluate their parameters. The research will be focused on the design of new protocols, methods of encoding transmitted information and carrier signal modulation with the goal to improve accuracy and reliability of the transmitted time and frequency. This is a complex topic that is interdisciplinary and includes computer networks and programming of FPGA circuits with a possible overlap in the design of electronic circuits and possibly opto-electronic circuits.