Dr. Syed H. Murshid
Professor of Electrical and Computer EngineeringFlorida Institute of Technology, USA
Title of Presentation
Multi Tb/s hybrid optical fiber communication architectures supporting physical layer encryption.
Summary of Presentation
Optical fiber communications systems and architectures revolving around spatial domain multiplexing, orbital angular momentum of photon based multiplexing and wavelength division multiplexing are presented. Spatial domain multiplexing (SDM) also known as space division multiplexing can increase bandwidth and spectral efficiency of optical fibers by an order of magnitude or greater. SDM is a multiple input multiple output (MIMO) architecture that launches light from multiple laser sources of same wavelength into a single carrier fiber at different angles. The resultant channels follow different helical trajectories while traversing the length of the carrier fiber thereby allowing spatial reuse of optical frequencies and adding a new degree of photon freedom to optical fibers. The input launch angles determine the spatial characteristics of the output by allocating a unique spatial location to each channel. The energy density of each channel follows a different radial distribution, exhibits no discernible crosstalk, and simple spatial filtering techniques are employed at the output end of the fiber to de-multiplex these signals. Helically propagating SDM channels also exhibit orbital angular momentum (OAM) of photons. Hence, clockwise as well as counter-clockwise OAMs can be independently generated leading to another degree of photon freedom. This endeavor presents a hybrid MIMO architecture that combines SDM and OAM over a single multimode carrier fiber. It also shows that the radial location of the output of SDM channels is independent of the wavelength of light source, allowing integration of SDM and OAM based multiplexing techniques to WDM based designs. Hence this leads to hybrid architectures that can support Multi-Terabit per second optical transport and also enable highly efficient physical layer encryption.
Presenter Short Biography
Syed H. Murshid is a Professor of Electrical and Computer Engineering at Florida Institute of Technology in Melbourne, Florida. He teaches courses in optics and electrical engineering at both graduate and undergraduate levels. His research focuses on optical fiber communications and sensors. He is pushing state-of-the-art in optical fiber bandwidth using hybrid optical architectures. His contributions include the addition of two new degrees of photon freedom to optical fiber multiplexing techniques. As the inventor of SDM and OAM in optical fibers, he holds multiple patents to these technologies. His current research activities are focused on combining these technologies for communication architectures exceeding 10 Tb/s.
Professor Murshid is an active researcher and his endeavors regularly receive support from government and industry. He disseminates the results of his research on a regular basis in the form of books, book chapters, peer-reviewed articles, conference presentations, and has published over one hundred papers. He holds ten US and International patents and has written over 30 patent disclosures. In November 2004, he was named one of Florida’s five most influential scientists by the Florida Trend Magazine. He is a senior member of OSA and SPIE and is a member of IEEE, ASEE, and the National Academy of Inventors.
Murshid received BE in Electronics Engineering in 1986 from NED University of Engineering and Technology in Karachi and served the instrumentation and process industry until 1994 in different capacities that focused on design and maintenance of SCADA systems. He received MS in Electrical Engineering from Florida Institute of Technology in 1995, followed by PhD in Electrical Engineering in 1997. After a brief sojourn with Harbor Branch Oceanographic Research Institute, he returned to Florida Tech in 1999, where he currently teaches courses in electrical circuits, virtual instrumentation, photonics, fiber-optic communications and fiber-optic sensors.