关于贝尔实验室Dong Po博士、北京大学王剑威副教授及都柏林城市大学Liam Barry 教授报告会的通知

报告题目：Silicon Photonic Integrated Circuits

报告人：Dong Po博士

单位：诺基亚-贝尔实验室

报告时间及地点：2018.10.29下午3:00-4:00，浙大玉泉教三440

摘要：

System-on-chip with photonic integrated circuits (PICs) and electrical integrated circuits (ICs) can revolutionize communication, imaging, displays, sensors, and computing systems. Silicon PICs are a disruptive technology that offers a robust platform for integrating many optoelectronic and nonlinear photonic elements on millimeter-sized silicon chips that are fueled by innovative devices with compact sizes, high speeds, broad bandwidths, and low power consumption. The devices’ function and performance can be extended or enhanced by heterogeneous integration with other materials such as III-V semiconductors, polymers, and lithium niobate. In this talk, I will review the technical merits of silicon photonic devices and integrated circuits, which have benefited from high-index-contrast silicon waveguides; a high level of integration with various optical functions on the same chips; and mature complementary metal-oxide semiconductor (CMOS) fabrication techniques. These technical merits ensure silicon photonics’ position as a disruptive optical technology that will achieve low-cost and compact on-chip systems for data communications and other applications. In particular, I will discuss silicon photonic circuits for use in applications such as chip-scale optical interconnects, short-reach communications in datacenters and supercomputers, and metro/long-haul optical transmissions.

简介：

Dr. Po Dong currently works as the department head of the silicon photonics group at Nokia Bell Labs. He received his PhD degree in electrical engineering from McGill University in Montreal, Canada. Before Bell Labs, he worked as a principal engineer at Kotura, Inc. He has been working in the field of silicon photonics for more than ten years and has contributed to critical breakthroughs related to energy-efficient silicon photonic devices for chip-scale interconnects and high-capacity photonic circuits for telecom/datacom applications. He has authored or coauthored about 180 journal articles and conference publications as well as three book chapters. He has worked as an associate editor of Optics Express for six years and has served as a committee member or chair for conferences such as the CLEO; the Integrated Photonics Research, Silicon, and Nano-Photonics Conference; and the OFC. He is a Fellow of both IEEE and OSA.

报告题目：Quantum photonics in silicon

报告人：王剑威 副教授

单位：北京大学

报告时间及地点：2018.10.29下午4:00-5:00，浙大玉泉教三440

摘要：

On-chip producing, controlling and detecting quantum states of light with large-scale silicon-photonic circuits opens the way to realizing complex quantum technologies for applications in the fields of computing, simulation and communication [1]. In this talk we present recent progress on large-scale silicon-photonic quantum technologies and applications, and discuss routes towards scalable quantum computing. We demonstrate a silicon-photonic chip integrating more than 550 components, able to generate, manipulate and measure high-dimensional entanglement with high controllability and universality [2]. Universal two-qubit operations have been enabled recently by controlling a complex network of linear-optic devices [3]. A chip-to-chip quantum interconnect technology, allowing the entanglement distribution and teleportation between separated chips, has been demonstrated going beyond a single-chip quantum system [4]. With the developed quantum photonic hardware it allows us to benchmark the simulation and characterizations of electron spin systems [5] and molecular systems with photons [6]. These results show silicon-integrated quantum photonic circuits as a versatile testbed for new quantum algorithms and as a route towards large-scale quantum information processing, pointing the way to applications in fundamental science and quantum technologies.

Refs:

1. J. L. O'Brien, et. al. Photonic quantum technologies, Nature Photonics 3, 687 (2009)

2. J. Wang, et. al, Multidimensional quantum entanglement with large-scale integrated optics, Science 360, 285 (2018)

3. X. Qiang, et. al., Large-scale silicon quantum photonics implementing arbitrary two-qubit processing, Nature Photonics 12, 534 (2018)

4. J. Wang, et. al. Chip-to-chip quantum photonic interconnect by path polarization interconversion. Optica 3, 407 (2016)

5. J. Wang, et. al., Experimental quantum Hamiltonian learning, Nature Physics 13, 551 (2017).

6. R. Santagati, et. al. Witnessing eigenstates for quantum simulation of Hamiltonian spectra, Science Advances 4, eaap9646 (2018)

简介：

Dr. Jianwei Wang received the Bachelor degree (2008) and Master degree (2011) in the Optics Engineering from Zhejiang University, and obtained his PhD degree in Physics at the University of Bristol (2016). He is a young scholar of the 14th batch of National Thousand Talent Program . He has published about 20 papers in refereed journals  including Science, Nat. Photon., Nat. Phys., Phys. Rev. Lett., Optica, etc.  His current research interests are mainly focusing on quantum information science and technology with photons. He is developing large-scale quantum photonic integrated circuits and systems, and applying this manufacturable quantum technology for the understanding of quantum fundamentals and for quantum information applications in the fields of communication, sensing, learning, simulation and computing.

报告题目：Advanced optical sources for spectrally efficient photonic systems

报告人： Liam P. Barry教授

单位：都柏林城市大学

报告时间及地点：2018.10.30上午11:00-12:00，浙大玉泉教三440

摘要：

The continuing growth in demand for bandwidth (from residential and business users), necessitates significant research into new advanced technologies in future communication systems. Two specific technologies which are becoming increasingly important for future photonic systems are wavelength tunable lasers and optical frequency combs.

Although these topics have been studied for over two decades, their significance for future ultra-high capacity photonic systems has only recently been fully understood. Wavelength tunable lasers are currently becoming the norm in optical communication systems because of their flexibility and ability to work on any wavelength. However, as their operating principles are different to standard single mode lasers, they can affect how future systems will operate, e.g., as optical transmission systems move towards more coherent transmission (where the data is carried using both the intensity and phase of the optical carrier), the phase noise in these tunable lasers will become increasingly important.

Optical frequency combs also have many applications for future photonics systems, and they can be used to obtain the highest spectral efficiency in optical transmission systems by employing the technology of optical frequency division multiplexing (OFDM), and also for generation of high frequency RF signals in future 5G netwroks. Wavelength tunable lasers and optical frequency combs are thus topics at the leading edge of current photonics systems research, and their detailed understanding promises new applications in all-optical signal processing, optical sensing and metrology, and specifically telecommunications.

This talk will focus on the development and characterization of various wavelength tunable lasers and optical frequency combs, and then outline how these sources can be employed for developing optical transmission systems and networks which make the best use of available optical spectrum.

简介：

Liam P. Barry received his BE (Electronic Engineering) and MEngSc (Optical Communications) degrees from University College Dublin in 1991 and 1993 respectively, and he received his PhD.degree from the University of Rennes, France, in 1996. He is currently a Professor in the School of Electronic Engineering, a Principal Investigator for Science Foundation Ireland, and Director of the Radio and Optical Communications Laboratory. His main research interests are; all-optical signal processing, optical pulse generation and characterization, hybrid radio/fibre communication systems, wavelength tuneable lasers for reconfigurable optical networks, and optical performance monitoring. He has published over 200 articles in international peer reviewed journals, 250 papers in international peer reviewed conferences, and holds 10 patents in the area of optoelectronics. He has been a TPC member for the European Conference on Optical Communications (ECOC) since 2004, and a TPC member for the Optical Fibre Communication Conference (OFC) from 2007 to 2010, serving as Chair of the Optoelectronic Devices sub-committee for OFC 2010.