Titre: How much room for Optics in Next Generation Interconnects?
Conférencier: Sébastien Rumley , Lightwave Research Laboratory, Université Columbia, É.-U.
Lieu: Polytechnique Montréal, Pavillon Lassonde, M-2204 ,
Date et heure: vendredi le 17 juin 2016 de 14:00 à 16:30

Résumé: Photonic technologies can provide many benefits to High Performance Computing systems. Meter-scale communications in current supercomputers rely on optical cables already, yet substantial progress can be achieved to better integrate optical transceivers within the compute nodes. Deeper integration of photonics, however, may trigger important changes in node architectures. In particular, the organization of memory hierarchies might undergo significant review if very large amounts of memory, not necessarily co-packaged with the main compute die, can be accessed in a high-bandwidth and energy efficient way. In conjunction with improved integration of photonic at end-points, transparent photonic switching can also be leveraged to increase interconnect flexibility at low cost, or to offload regular electronic packet routers. Photonic switching is undoubtedly subject to very distinct rules and constraints when compared to its electrical counterpart, and its insertion in very large scale architectures must be carefully engineered to be advantageous. In this talk, we review the prospects of integrated Photonics and optical switching. Main figure of merits for future on-chip optical transceivers and switches will be introduced. In light of these results, potential upcoming changes and challenges in interconnect and node architectures will be sketched and discussed.

Note biographique: Sébastien Rumley received the M.S. and Ph.D. degrees (in communication system) from Ecole Polytechnique Fédérale de Lausanne, Lausanne, Switzerland, in 2005 and 2011. Since 2012 he is with the Lightwave Research Laboratory, Columbia University, New York, as post-doctoral researchers (2012 - 2014), then as Research Scientist. His research focuses on multilayer, cross-scale modeling and optimization of large scale interconnection networks. This includes analysis of nanophotonic devices and the integration thereof in next generation computing systems, network topology design and dimensioning, characterization of data-movement requirements and end-to-end evaluation of interconnect power consumption.

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