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    The Communication Society, Baltimore Section

February 14, 2012
5:30 PM to 8:00 PM

Presentation commences at 6:00PM, food available at 5:30PM

Location: National Electronics Museum

            1745 W. Nursery Rd., Linthicum, MD

            (410) 765-2345


    Single-Mode Fiber Capacity Limit and Capacity Increase through Spatial Multiplexing in Fibers

    René-Jean Essiambre
    Bell Laboratories
    Alcatel Lucent


    The maximum rate of transmission of information over a single strand of optical fiber has increased by three orders of magnitude over the last two decades. A question naturally arises: is there a fundamental limit to the capacity of fibers? In the last 5 years, we have developed a theoretical framework based on Shannon’s information theory to calculate an estimate of the fundamental capacity limit of fibers due to fiber nonlinearity. We incorporated the optical Kerr effect, a physical phenomenon in optical fibers that causes a rapid increase in signal distortions with increasing signal power. Approaching the predicted fiber capacity limit requires a series of advanced electronic and optical technologies including distributed Raman amplification, arbitrary waveform generation, coherent detection and nonlinear digital signal processing. The impact of advanced single-mode fibers on nonlinear fiber capacity has also been considered. To further increase capacity beyond the single-mode fiber capacity limit, we are considering the use of spatial multiplexing in multicore and multimode fibers. We have performed recent experimental demonstrations of transmission over thousands of kilometers in few-mode and multicore fibers at speeds as high as 100 Gb/s per channel and per mode using many spatial modes and multiple-input multiple-output (MIMO) detection technologies. In this talk, I will present the theoretical aspects of the nonlinear Shannon capacity limit, the capacity limit of the most important fiber types and describe recent experimental results on spatial multiplexing in fibers.


    René-Jean Essiambre studied at McGill University in Montréal and Université Laval in Québec City from which he received a Ph.D. degree in Physics (Optics) in 1994. From 1995 to 1997, he was at The Institute of Optics of the University of Rochester, Rochester, NY. Since 1997, he has been at Bell Laboratories, Alcatel-Lucent, Holmdel, New Jersey, USA. His early research areas are optical switching, soliton communication systems, high-power fiber lasers, and mode-locked fiber lasers. His current research interests include high-speed transmission (400 Gb/s and above), the physical layer design of fiber-optic communication systems and the application of information theory to fiber-optic communication systems. He is the author and coauthor of more than 100 scientific publications and several book chapters. He has served on many conference committees including ECOC, OFC, CLEO, and LEOS. He is currently the Program Co-Chair of CLEO: Science & Innovations 2012. Dr. Essiambre is a Fellow of the Optical Society of America (OSA), the recipient of the 2005 OSA Engineering Excellence Award and a Distinguished Member of Technical Staff at Bell Laboratories.

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