第294期：1. Photonic Integrated Circuits on InP: Technology, building blocks, application 2. Advanced Optical Tx and Rx Modules Enabled by Polymer Photonics
报告题目1：Photonic Integrated Circuits on InP: Technology, building blocks, application
报 告 人：Norbert Grote (Fraunhofer Heinrich Hertz Institute (HHI), Berlin, Germany)
Abstract: Photonic Integrated Circuits (PIC) have witnessed tremendous progress over the past 10 years. Two materials technologies are being pursued as platforms, namely silicon-on-insulator (SOI) (“Si-photonics”, SiP) and indium phosphide (InP). In the frame work of the European projects Euro PIC and PARADIGM, development of generic photonic integration technology has been undertaken to design and fabricate complex InP based photonic integrated circuits (PIC) using a defined set of building blocks.
At HHI the development started from a “receive-only (Rx)” platform that offers a 40?GHz waveguide-integrated pin photodiode as key building block, and three different ridge-type waveguides including optical transition between them for optical on-chip interconnects and as basis for passive functional structures, e.g. arrayed waveguide gratings, MMI couplers, and thermo-optical phase shifters. This platform has been now extended to a full “transmit-and-receive (Tx-Rx)” platform including gain blocks/SOAs, DFB (20 GHz bandwidth) and tunable (~5 nm) DBR lasers. Multi-project wafer runs with open access are scheduled four times a year on a pre-commercial basis. Examples of fabricated PICs will be presented.
Biography: Dr. Grote studied physics at the Technical University of Aachen (RWZH), Germany, from which he received the Dipl. Phys. and Dr.-Ing. degree in 1974 and 1977, respectively. At RWTH he was working on III-V (GaInP, GaAlP) based light emitting diodes and GaAs DFB lasers. In 1981 he joined the Heinrich Hertz Institute in Berlin and was among the first to help establish the Integrated Optics Dept. aiming at developing components for optical telecommunication systems, primarily on InP basis. He was deputy head of the Photonic Components department since 2003 until his retirement in 2015 and gets invited back as senior consultant. Dr. Grote has (co)authored 130+ publications in scientific journals and conference proceedings, edited two textbooks, and chaired various conferences and workshops including the prestigious “International Conference on Indium Phosphide and Related Materials” (23rd IPRM), for which he served as chairman of the International Steering Committee from 2011-2013.
报告题目2：Advanced Optical Tx and Rx Modules Enabled by Polymer Photonics
报 告 人：Ziyang Zhang (Fraunhofer Heinrich Hertz Institute (HHI), Berlin, Germany)
Abstract: The fast developing optical networks demand high-performance, highly integrated, plug-and-play transceiver modules that offer large bandwidth capacity, support colorless, polarization-multiplexed plus coherent transmission, and ideally also allow system-level software to regulate dataflow on the optical circuit level elastically according to the current traffic condition. Under this background, an ambitious photonic integration platform has been established, attempting to combine the merits from many separate material systems. State-of-the-art, fully packaged optoelectronic modules have been demonstrated, including serial 100 Gb/s, 2×100 Gb/s and wavelength tunable 100 Gb/s optical transmitters.
With more powerful components brought by polymer photonics, this hybrid integration platform has grown to enable multi-flow control in the advanced optical modules, aiming to provide extraordinary amount of flexibility and ultra-high spectral efficiency in the optical networks. On top of the capability to handle different data rates, multiple modulation formats and varying transmission reaches, the transmitter features an inherent “redundancy” in the optical circuit design and is able to either aggregate the data capacity into a smaller number of large data flows or distribute it into a larger number of small data flows, adapting to the status of the incoming traffic. The concept and practical solutions will be presented.
Biography: Dr. Zhang received his doctor degree from the Royal Institute of Technology (KTH), Sweden, in 2008. His PhD research covers the design, fabrication and characterization of high Q photonic crystal resonators, ring resonators and resonator-waveguide coupled systems on silicon platform. In summer 2008 he joined Fraunhofer Heinrich Hertz Institute (HHI), where he has been developing product prototypes for the telecom industry using polymer and InP materials. He has also been leading EU-funded and German-national research projects based on hybrid photonic integration. Dr. Zhang has authored and co-authored over 100 publications, guest-edited a special issue on polymer photonics, written two book chapters and owns two patents. Currently he is promoting a trans-material photonic integration platform to build advanced photonic devices for applications in infocom, sensing and medical diagnosis.