CREOL Room 102
Department of Electrical & Computer Engineering
University of Virginia
Photodetectors continue to play a crucial role in fiber optic communication systems and microwave photonics as applications demand higher bandwidths, larger power levels, and increased spectral efficiencies. As conventional top-illuminated p-i-n photodiodes cannot achieve the requisite bandwidth-efficiency products and output power levels the move to waveguide photodiodes, photodiode arrays, and novel epitaxial layer structures is paving the way for the development of very high-speed, high-power photodetectors suitable for photonic integration. Incorporated into photonic integrated circuits (PICs), waveguide photodetectors enable more complex receiver architectures for the detection of advanced modulation formats guaranteeing highest performance at the highest packing density. Since PICs combine optical, optoelectronic and eventually electronic functionalities on a single chip, they have the potential to meet future capacity requirements and enable novel applications spanning from optoelectronic oscillators to optical interconnects.
In my talk, I present state-of-the-art 145 GHz-waveguide photodiodes and high-power traveling wave photodetectors that have been successfully operated at bitrates as high as 160 Gbit/s. I discuss the development of an integrated dual-polarization coherent receiver that has become a key component in today’s 100 Gbit/s and emerging 400 Gbit/s fiber optic links. I cover novel device structures and photodiode arrays that enabled photonic generation of highly linear microwave signals at record-high output power levels. This includes heterogeneously integrated InP-based photodiodes on silicon that achieved the highest saturation current-bandwidth products on a silicon photonics platform to date. Finally, I discuss future directions in photodetector research and emerging applications.
Andreas Beling received his Ph.D. in electrical engineering from Technical University Berlin, Germany, in 2006.
From 2001 to 2006 he was a staff scientist in the photonics division at the Heinrich-Hertz-Institut für Nachrichtentechnik (HHI) in Berlin. At HHI, he was engaged in the design and characterization of high-speed optoelectronic circuits. From 2006 to 2008 he was a Research Associate in Prof. Joe C. Campbell’s group at the University of Virginia. At UVa he worked on high-power high-linearity photodiodes. He joined u2t Photonics AG in Berlin in 2008 where he worked as a project manager on the development of new optoelectronic receivers for 40 and 100 Gbit/s fiber optic systems.
He returned to UVa in late 2010 where he is currently a Research Scientist in the Department of Electrical and Computer Engineering. His research interests include photonic integrated circuits and high-speed optoelectronic devices for fiber optic communication systems and microwave photonics.
Andreas Beling has authored or co-authored more than 85 technical papers, two patents, and two book chapters. He was a member of the technical program committee of the Optical Fiber Communication (OFC) Conference from 2010 to 2012. He served as a Technical Program Subcommittee Chair for Subcommittee 8 (Optoelectronic Devices) at OFC this year.
For more information:
Dr. Winston V. Schoenfeld
Associate Professor of Optics & The Florida Solar Energy Center (FSEC)
winston @ creol. ucf. edu