27 February 2015

COBRA COLLOQUIUM: Friday February 27, 2015 at 15:30 – 16:30 in the Auditorium Room 4

Speaker: Dr. Peter Winzer

Title: Spatial Multiplexing: The Final Frontier in Optical Network Capacity Scaling

Abstract: With network traffic growing exponentially between 30% and 60% per year, depending on application segment and geography, conventional single-mode fiber systems are rapidly approaching their fundamental Shannon capacity limits. In fact, today’s Wavelength-Division Multiplexing (WDM) products are already within a factor of 3 to 6 from their fundamental limits, with little room for economically attractive growth. As such, it is critically important to deploy capacity using parallelism in the frequency domain (i.e., multi-band systems) or in the spatial domain (i.e., Space-Division Multiplexing, SDM). While the former route will be able to provide a stop-gap solution to meet the most immediate traffic needs, the latter allows for orders of magnitude in capacity scalability. In this talk, we will review SDM research and examine integration options that need to be pursued to make SDM a commercially attractive reality. We will explore implications of ultimately inherent crosstalk on optical multiple-input-multiple-output (MIMO) digital signal processing, network architectures, and physical-layer security.

Biography: Peter J. Winzer received his Ph.D. in electrical engineering from the Vienna University of Technology, Austria, in 1998. Supported by the European Space Agency (ESA), he investigated photon-starved space-borne Doppler lidar and laser communications using high-sensitivity digital modulation and detection. At Bell Labs since 2000, he has focused on various aspects of high-bandwidth fiber-optic communication systems, including Raman amplification, advanced optical modulation formats, multiplexing schemes, and receiver concepts, digital signal processing and coding, as well as on robust network architectures for dynamic data services. He contributed to several high-speed and high-capacity optical transmission records with interface rates from 10 Gb/s to 1 Tb/s, including the first 100G and the first 400G electronically multiplexed optical transmission systems and the first field trial of live 100G video traffic over an existing carrier network. Since 2008 he has been investigating and internationally promoting spatial multiplexing as a promising option to scale optical transport systems beyond the capacity limits of single-mode fiber. He currently heads the Optical Transmission Systems and Networks Research Department at Bell Labs in Holmdel, NJ. He has widely published and patented and is actively involved in technical and organizational tasks with the IEEE Photonics Society and the Optical Society of America (OSA), currently serving as Editor-in-Chief of the IEEE/OSA Journal of Lightwave Technology and as Program Chair of the 2015 Optical Fiber Communication Conference (OFC). Dr. Winzer is a Bell Labs Fellow and a Fellow of the IEEE and the OSA.

After the colloquium (around 16:30) we organize a mini-colloquium in which two COBRA researchers, will give a short presentation about his or her work.

For the Physics of Nanostructures Group:
Speaker: Reinoud Lavrijsen Title: Tuning asymmetric exchange: towards an ideal integrated racetrack memory?
For the Photonic Integration Group:
Speaker: Aura Higuera Rodriguez Title: Light coupling to integrated circuits with metallic gratings

The audience is invited to an informal gathering following the colloquium (around 17:00) in the Senaatszaal/Voorhof