EPFL, Switzerland
Title: Hybrid low loss integrated photonics: from chipscale frequency combs, frequency agile lasers, erbium amplifiers to cryogenic quantum interconnects
Abstract: Recent advances in attaining ultra low loss highly confining silicon nitride waveguides with loss in the dB-meter range, and their heterogeneous integration with MEMS and Lithium Niobate have opened up novel applications that benefit not only from scalable manufacturing, compact form factor and low power, but crucially have now reached a point where the performance is on par and even exceeding that of legacy optical systems. I will describe a range of novel advances, including photonic integrated circuit based frequency agile lasers with fiber laser phase noise, parametric traveling wave amplifiers, Erbium amplifiers on chip, as well as soliton frequency combs, with applications from coherent communications, LiDAR to cryogenic quantum interconnects.
Biography: Tobias J. Kippenberg is Full Professor of Physics at EPFL and leads the Laboratory of Photonics and Quantum Measurement. He obtained his BA at the RWTH Aachen, and MA and PhD at the California Institute of Technology (Caltech in Pasadena, USA). From 2005- 2009 he lead an Independent Research Group at the MPI of Quantum Optics, and is at EPFL since. His research interest are the Science and Applications of ultra high Q microcavities; in particular with his research group he discovered chip-scale Kerr frequency comb generation (Nature 2007, Science 2011) and observed radiation pressure backaction effects in microresonators that now developed into the field of cavity optomechanics (Science 2008). Tobias Kippenberg is alumni of the “Studienstiftung des Deutschen Volkes”. For his invention of “chip-scale frequency combs” he received he Helmholtz Price for Metrology (2009) and the EFTF Young Investigator Award (2010). For his research on cavity optomechanics, he received the EPS Fresnel Prize (2009). In addition he is recipient of the ICO Prize in Optics (2014), the Swiss National Latsis award (2015), the German Wilhelm Klung Award (2015) and ZEISS Research Award (2018). He is fellow of the APS and OSA, and listed since 2014 in the Thomas Reuters highlycited.com in the domain of Physics.
University of Cambridge, UK
Title: Where next for digital coherent transceivers?
Abstract: From 80 km terrestrial links between data centres to transpacific submarine systems, digital coherent transceivers have become the dominant technology for modern optical fibre communication. We review the historic evolution of the digital coherent transceiver before discussing current trends in order to address the question of where next for digital coherent transceivers. We then discuss the future evolution of digital coherent transceivers before considering where else in the network digital coherent transceivers might be utilised. Passive optical networks (PON) for access is one specific area where conventional intensity modulation with direct detection is currently dominant. We examine the case for the deployment of digital coherent transceivers in the PON, including our recent research that enables symmetric bidirectional 200 Gbit/s transmission with more than 29 dB power budget. We close by reflecting on future challenges for digital coherent transceivers.
Biography: Seb J. Savory received M.Eng., M.A., and Ph.D. degrees in engineering from Cambridge, an M.Sc. (Maths) in mathematics from the Open University and a Postgraduate Certificate in Teaching and Learning in Higher Education from UCL.
His interest in optical fibre communication began in 1991, when he joined STL (subsequently Nortel) in Harlow, the birthplace of the field. Having been sponsored by Nortel through his undergraduate and postgraduate studies, he rejoined the Harlow Laboratories in 2000. In 2005, he moved to UCL where he held a Leverhulme Trust Early Career Fellowship from 2005 to 2007, before being appointed as a Lecturer (2007), Reader (2012) and Professor (2015). In October 2015, he was elected as a Fellow of Churchill College, Cambridge moving to Cambridge in January 2016 as a University Lecturer and subsequently promoted to Professor of Optical Fibre Communication in October 2019. For his contributions to digital coherent transceivers for optical fibre communication he was elected a Fellow of the IEEE and the OSA in 2017.
He has taught electronics, maths and optical fibre communication systems at both UCL and Cambridge and was heavily involved in the design of the Integrated Engineering Programme at UCL (when he was Undergraduate Tutor and Programme Director within the Department of Electronic and Electrical Engineering). From August 2018 to July 2021 he was the Director of Undergraduate Education within the Cambridge University Engineering Department.
Externally, he serves as Vice President for Publications within the IEEE Photonics Society (IPS), having previously served on the IPS Board of Governors (2018-2020) and Editor-in-Chief of IEEE Photonics Technology Letters (2012-2017). Until June 2021 he was the Chair of the Steering Committee for the Optical Fiber Communication (OFC) Conference having previously served as Program for OFC 2013 and General Chair for OFC 2015. He is a Chartered Engineer and Fellow of the IEEE, IET, OSA and HEA.
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Unversity of California Los Angeles
Title: Real-Time Hyperspectral Terahertz Imaging
Abstract: With the rapidly developing terahertz science and technology, terahertz imaging has facilitated a plethora of applications, such as biomedical imaging, security screening, and conservation of cultural heritage. An ideal terahertz imaging system should provide ultrafast temporal, hyperspectral, spatial amplitude and phase information of the imaged object with a high throughput. However, state-of-the-art terahertz imaging systems cannot satisfy all these requirements. For example, the majority of terahertz time-domain imaging systems are still based on a single-pixel architecture, which requires two-dimensional raster scanning to capture an image, limiting the imaging speed. On the other hand, microbolometer and field-effect-transistor-based terahertz detector arrays cannot directly provide spectral and phase information. Here, we present a terahertz focal-plane array comprised of ~0.3 million plasmonic nano-antennas that can generate ultrafast temporal and hyperspectral terahertz images with more than 3 THz bandwidth. Utilizing the rich spatio-temporal and spectral information provided by this focal-plane array, a deep convolutional neural network is utilized to super-resolve images of objects while reconstructing their shape and depth profiles. We demonstrate the super-resolution of both shape and depth information of imaged objects with a lateral/depth resolution as small as 60/10 mm and an effective number of pixels exceeding 1-kilo-pixels and an imaging speed exceeding 16 fps. This terahertz imaging system would create new opportunities for real-world terahertz applications, e.g., in non-destructive quality control, medical diagnosis, and security screening.
Biography: Mona Jarrahi received her B.S. degree in Electrical Engineering from Sharif University of Technology in 2000 and her M.S. and Ph.D. degrees in Electrical Engineering from Stanford University in 2003 and 2007. She served as a Postdoctoral Scholar at University of California Berkeley from 2007 to 2008. After serving as an Assistant Professor at University of Michigan Ann Arbor, she joined University of California Los Angeles in 2013 where she is currently a Professor and Northrop Grumman Endowed Chair in Electrical and Computer Engineering and the Director of the Terahertz Electronics Laboratory.
Prof. Jarrahi has made significant contributions to the development of ultrafast electronic and optoelectronic devices and integrated systems for terahertz, infrared, and millimeter-wave sensing, imaging, computing, and communication systems by utilizing novel materials, nanostructures, and quantum structures as well as innovative plasmonic and optical concepts. The outcomes of her research have appeared in 250 publications and 200 invited talks and have received a significant amount of attention from scientific news outlets including Huffington Post, Popular Mechanics, EE Times, and IEEE Spectrum. Her scientific achievements have been recognized by several prestigious awards including the Presidential Early Career Award for Scientists and Engineers (PECASE); Friedrich Wilhelm Bessel Research Award from Alexander von Humboldt Foundation; Moore Inventor Fellowship from the Gordon and Betty Moore Foundation; A F Harvey Engineering Research Prize from the Institution of Engineering and Technology (IET); Kavli Fellowship by the USA National Academy of Sciences (NAS), Grainger Foundation Frontiers of Engineering Award from the USA National Academy of Engineering (NAE); Breakthrough Award from Popular Mechanics Magazine; Research Award from Okawa Foundation; Innovations in Regulatory Science Award from the Burroughs Wellcome Fund; Harold E. Edgerton Award in High-Speed Optics from the International Society for Optics and Photonics (SPIE); Early Career Award in Nanotechnology from the IEEE Nanotechnology Council; Outstanding Young Engineer Award from the IEEE Microwave Theory and Techniques Society; Booker Fellowship from the USA National Committee of the International Union of Radio Science; Lot Shafai Mid-Career Distinguished Achievement Award from the IEEE Antennas and Propagation Society; Early Career Award from the USA National Science Foundation (NSF); Young Investigator Awards from the USA Office of Naval Research (ONR), the Army Research Office (ARO), and the Defense Advanced Research Projects Agency (DARPA); Watanabe Excellence in Research Award from UCLA Henry Samueli School of Engineering and Applied Science; Elizabeth C. Crosby Research Award from the University of Michigan; and Distinguished Alumni Award from Sharif University of Technology. Prof. Jarrahi is a Fellow of the Institute of Electrical and Electronics Engineers (IEEE), Optical Society (OPTICA), International Society for Optics and Photonics (SPIE), American Physical Sosiety (APS), Institute of Physics (IoP), and has served as a distinguished lecturer of IEEE, traveling lecturer of OSA, and visiting lecturer of SPIE societies.
 Xiaojun Tang
Huawei Technologies Co., Ltd.
Title: Optical Communication System Architecture & Technology Evolution towards 2030
Abstract: It is anticipated that in the upcoming years, advancements in AI large model technology will lead to the establishment of extensive AI clusters and a massive increase in data volume. Near-eye/single-eye 3D display technology will become widely available in the market. Broadband networks in near-Earth space will undergo large-scale commercialization. Serving as the bedrock of digital infrastructure, optical communication networks will face unparalleled opportunities and challenges. The evolution of optical communication networks and architectures towards 2030 is crucial, particularly in terms of industrialization, future development directions, innovative ideas, and feasible technical routes. This evolution will result in the creation of a new, forward-looking optical communication network system that meets the diverse and high-quality requirements of an intelligent world.
Biography: Dr. Tang, Ph.D. in Physical Electronics and Optoelectronics, is the Chief Technology Planner and Director of Huawei Optical Technology Planning Dept. Since joining Huawei in 1998, Dr. Tang served as an R&D director, the PDT manager, the PDU director, and a product line representative outside China. He has been responsible for optical communications R&D and technology research for many years. Now, he is leading the planning, development, and project implementation of cutting-edge technologies in the optical domain, and promoting the long-term technological evolution and development of the optical industry. |
Tobias Kippenberg
Mona Jarrahi