Optical Fiber Interference is Not Noise
Optical fiber networks are indispensable for our society´s information infrastructure. The demands for high-capacity, reliable communications will continue to increase for many years, due to new emerging services such as cloud processing and telepresence. This project addresses one of the fundamental bottlenecks in the development of next-generation optical networks, namely interference. Interference occurs between copropagating signals on different wavelengths, or between time-multiplexed signals on the same wavelength. This interference, caused by both linear and nonlinear effects, is essentially deterministic and has been accurately modeled. However, the receivers in today´s optical networks treat this interference simply as random noise. In this project, we will challenge this design paradigm and propose a new network design paradigm based on multiuser information theory. First, we will assume that each transmitter uses a point-to-point optimal transmission scheme, known to all receivers, and design interference-aware receiver algorithms under somewhat idealized conditions. Second, we will develop transmission schemes that minimize the interference at unintended receivers. And third, the new receiver and transmitter design paradigms will be combined and adapted for use in realistic, large-scale optical networks, achieving a significant throughput increase over today´s networks.
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Professor, Signals and Systems
Erik Agrell is a Professor in Communication Systems. His research interests belong to the fields of information theory, coding theory, and digital communications. Apart from doing fundamental...
Professor, Department of Signals and Systems
Dr. Giuseppe Durisi's research area is information theory, a mathematical discipline that deals with optimal methods for representing, communicating and storing digital information. His research...
Professor, Microtechnology and Nanoscience, Photonics Laboratory
Magnus Karlsson is professor in photonics, with focus on fiber optics and optical communications. His expertise is wave propagation in optical fibers, polariztion effects, nonlinearities and optical...
Kamran Keykhosravi is a PhD student in the Communication systems division. He works on optical fiber networks on the basis of information theory. His areas of interest are optics, information theory...
- Swedish Research Council (VR) (Public, Sweden)