Yannis Benlachtar, Rachid Bouziane, Robert I. Killey, Christian Berger, Peter A. Milder, Robert Koutsoyannis, James C. Hoe, Markus Püschel and Madeleine Glick (Proc. International Conference on Transparent Optical Networks (ICTON), pp. 1-4, 2010)
Optical OFDM for the Data Center
Preprint (242 KB)
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We investigated the use of orthogonal frequency division multiplexing (OFDM) to increase the capacity of multimode fiber (MMF)-based optical interconnects for data center applications. This approach provides a solution to modulation bandwidth limitations of the lasers, and to the intermodal dispersion of the MMF which leads to frequency-dependent attenuation. Recent studies on adaptively modulated OFDM are reviewed, and new simulation results assessing the capacity of such links for lengths of up to 300 m are presented, assuming the use of 50/125 μm graded-index MMF at a wavelength of 850 nm. The use of coded OFDM as an approach to deal with intermodal dispersion is also discussed.