Photonic Integrated Circuits (Pics) for Next Generation Space Applications NASA Electronics Parts and Packaging (NEPP)
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Two-Dimensional Spatio-Temporal Signal Processing for Dispersion Compensation in Time- Stretched ADC
UCLA UCLA Previously Published Works Title Two-dimensional spatio-temporal signal processing for dispersion compensation in time- stretched ADC Permalink https://escholarship.org/uc/item/1p65n9cp Journal Journal of Lightwave Technology, 25 ISSN 0733-8724 Authors Tarighat, Alireza Gupta, Shalabh Sayed, Ali H. et al. Publication Date 2007-06-01 Peer reviewed eScholarship.org Powered by the California Digital Library University of California 1580 JOURNAL OF LIGHTWAVE TECHNOLOGY, VOL. 25, NO. 6, JUNE 2007 Two-Dimensional Spatio-Temporal Signal Processing for Dispersion Compensation in Time-Stretched ADC Alireza Tarighat, Member, IEEE, Shalabh Gupta, Student Member, IEEE, Ali H. Sayed, Fellow, IEEE, and Bahram Jalali, Fellow, IEEE Abstract—Time-stretched analog-to-digital converters (ADCs) have offered revolutionary enhancements in the performance of electronic converters by reducing the signal bandwidth prior to digitization. An inherent limitation of the time-stretched ADC is the frequency-selective response of the optical system that reduces the effective number of bits for ultrawideband signals. This paper proposes a solution based on spatio-temporal digital processing. The digital algorithm exploits the optical phase diversity to create a flat RF frequency response, even when the system’s transfer function included deep nulls within the signal spectrum. For a 10× time-stretch factor with a 10-GHz input signal, simulations show that the proposed solution increases the overall achievable signal-to-noise-and-distortion ratio to 52 dB in the presence of linear distortions. The proposed filter can be used to mitigate the Fig. 1. TS-ADC concept. dispersion penalty in other fiber optic applications as well. Index Terms—Analog-to-digital conversion (ADC), optical sig- a parallel array of slow digitizers, each clocked at a fraction nal processing, spatio-temporal digital processing, time-stretched of the Nyquist rate. -
Chemical Engineering Education Graduate Education in Chemical Engineering
I • N • D • E • X GRADUATE EDUCATION ADVERTISEMENTS Akron, Uni versity of. .......... , .... ... .................. 321 Iowa State Uni versity .................. ... ....... ....... 360 Pensylvania State Uni versity ........................ 395 Alabama, University of ................................ 322 Johns Hopkins University .... .... .. .... .... .......... 361 Pittsburgh, University of .............................. 396 Alabama, Huntsville; Uni versity of.. .... .. ..... 323 Kansas, University of ............................... .... 362 Polytechnic University .. .... ... .... ........... .. ..... .. 397 Alberta, Uni versity of .. ........ .... .. .... ... ..... ..... .. 324 Kansas State University ............... ... ...... ........ 363 Princeton University ....................... .......... .. .. 398 Arizona, University of ....... .. .... .. .... ... .. ... ....... 325 Kentucky, Uni versity of ........................ .. ..... 364 Purdue University .. ........... ... ... ....... ... .... .... ... 399 Arizona State University ..... .. ... ...... ..... ......... 326 Lamar University .. ... ..... ..... ......... ........... .. ..... 430 Rensselaer Polytechnic Institute .... ...... .... ... .. 400 Auburn Uni versity .. ..... .. ... ..... .. .............. .... ... 327 Laval Universite ...................... ........... ...... .. .. 365 Rhode Island, University of.. .... ..... .. ... ..... .. ... 435 Bri gham Young Uni versity .............. ... .. ..... ... 427 Lehigh University .................................. .... ... 366 Rice University -
Silicon Photonics
Silicon Photonics – Trends, Highlights and Challenges Overview Gnyan Ramakrishna, Chair, Technical Committee Photonics, EPS and Technical Leader, Cisco Systems Vipul Patel, Co-Chair, Technical Committee Photonics, EPS and Principal Engineer, Cisco Systems The Cisco Global Cloud Index estimates that total data center traffic (all traffic within or exiting a data center) will reach almost 20 zettabytes per year by 2021, up from 7 zettabytes in 2016. Data center traffic on a global scale will grow at a 25 percent CAGR, with cloud data center traffic growth rate at 27 percent CAGR or 3.3-fold growth from 2016 to 2021. The growth in internet traffic not only accelerates the need for next-generation technology to support higher port density and faster speed transitions but is also accompanied by large physical data center sizes as well as faster connectivity between the data centers. As the data rates and distances to carry high speed data are increasing, the limitations of traditional copper cable and multimode fiber-based solutions are becoming apparent and the industry focus is shifting towards adoption of single-mode fiber-optic solutions. Silicon Photonics is an emerging technology that is bringing a paradigm shift in the field of single mode fiber-optic communications. Silicon Photonics leverages mature CMOS wafer fabrication and packaging infrastructures to deliver high bandwidth, low power transceivers. Even though the current focus of the industry is to develop products for the pluggable market, it is generally accepted that Silicon Photonics will play a key role in the next generation of optics that is needed for co-packaging with ASICs. -
Read About the Future of Packaging with Silicon Photonics
The future of packaging with silicon photonics By Deborah Patterson [Patterson Group]; Isabel De Sousa, Louis-Marie Achard [IBM Canada, Ltd.] t has been almost a decade Optics have traditionally been center design. Besides upgrading optical since the introduction of employed to transmit data over long cabling, links and other interconnections, I the iPhone, a device that so distances because light can carry the legacy data center, comprised of many successfully blended sleek hardware considerably more information off-the-shelf components, is in the process with an intuitive user interface that it content (bits) at faster speeds. Optical of a complete overhaul that is leading to effectively jump-started a global shift in transmission becomes more energy significant growth and change in how the way we now communicate, socialize, efficient as compared to electronic transmit, receive, and switching functions manage our lives and fundamentally alternatives when the transmission are handled, especially in terms of next- interact. Today, smartphones and countless length and bandwidth increase. As the generation Ethernet speeds. In addition, other devices allow us to capture, create need for higher data transfer speeds at as 5G ramps, high-speed interconnect and communicate enormous amounts of greater baud rate and lower power levels between data centers and small cells will content. The explosion in data, storage intensifies, the trend is for optics to also come into play. These roadmaps and information distribution is driving move closer to the die. Optoelectronic will fuel multi-fiber waveguide-to-chip extraordinary growth in internet traffic interconnect is now being designed interconnect solutions, laser development, and cloud services. -
Optoelectronics – the Science and Technology at the Heart Cure St of 21 Century Telecommunications
Higher Physics Topical Investigation Skin Cancer—Prevention and Optoelectronics – the science and technology at the heart Cure st of 21 century telecommunications 2 Researching Physics Higher Investigation Brief Suntan creams stop harmful UV radiation reaching the skin. Manufacturers’ products are rated with a Sun Protection Factor (SPF). Suntan creams can have SPF values from 6 to over 50. UV radiation monitors normally measure Higher Physics Researching Physics Optoelectronics – the science and technology at the heart of 21st century telecommunications Contents Advice to students Page 3 Overview of the unit and activities Page 4 Organising your work and carrying out the activities Page 5 Assessment issues Web-based research briefs Page 6 Initial research activity - Optoelectronics devices – what are they? Page 7 Research activity 1 - Light Emitting Diodes Page 8 Research activity 2 - Optical Fibres Page 9 Research activity 3 - Liquid Crystal Displays Practical investigation briefs Page 10 Research activity 1A - Investigating LEDs and Colour Page 11 Research activity 1B - Investigating LEDs and Brightness Page 12 Research activity 1C - Investigating the Spectra of LEDs Page 13 Research activity 1D - Investigating the Energy Use of Light Sources Page 14 Research activity 2A - Investigating Optical Fibres and Bending Page 15 Research activity 2B - Investigating Optical Fibres and Length Page 16 Research activity 3A - Investigating Polarisation Page 17 Research activity 3B - Investigating Polarisation using a Liquid Crystal Shutter Page 18 Research activity 3C - Investigating Colour Mixing Page 19 Further Information Page 2 Higher Physics Researching Physics Optoelectronics – the science and technology at the heart of 21st century telecommunications Overview of the unit and activities. -
Technology and Economic Assessment of Optoelectronics
NBSIR-86/3369 A111DE M 3 b 2 7 3 PLANNING REPORT Technology and Economic Assessment of Optoelectronics Gregory Tassey Senior Economist National Bureau of Standards October 1985 100 • U56 86-3369 1985 C. 2 ww BttAtCN mPMMAEQS CEHTQ PLANNING REPORT 23 TECHNOLOGY AND ECONOMIC ASSESSMENT OF OPTOELECTRONICS Gregory Tassev Senior Economist National Bureau of Standards October 1985 ABSTRACT Optoelectronics is one of the two major technologies driving the revolution in communications, which will not only have profound effects on the economy but on social and political structures as well. The other technology, optical fibers, is already beginning to mature, but optoelectronics is rapidly catching ud, enabling the acceleration of the "information age". Future productivity advances in optoelectronics will come from integration of the various signal processing functions and from improved manufacturing technologies . Integration may occur in two important stages. The first, referred to "hybrid" integration, is almost at the point of commercialization. Hybrid devices use oxide-based (ceramic) materials and integrate some of the signal processing functions. Total or "monolithic" integration, based on gallium arsenide and related materials may not reach commercialization for another 8-10 years. In both cases, the economic impact will be substantial as information technologies become a critical element of most industries. As a result, the U.S. and its major competitors, especially Japan, are making major R&D investments in optoelectronics. Worldwide R&D expenditures are expected to reach $1 billion by 1987. In terms of market penetration, fiberoptic systems will attain annual sales of more than S3 billion by 1989. The Japanese have made a national commitment to becoming the world leader in this market, borrowing from their substantial expertise in semiconductor technology. -
Roadmap on Silicon Photonics
Home Search Collections Journals About Contact us My IOPscience Roadmap on silicon photonics This content has been downloaded from IOPscience. Please scroll down to see the full text. View the table of contents for this issue, or go to the journal homepage for more Download details: IP Address: 152.78.236.131 This content was downloaded on 24/06/2016 at 13:44 Please note that terms and conditions apply. Journal of Optics J. Opt. 18 (2016) 073003 (20pp) doi:10.1088/2040-8978/18/7/073003 Roadmap Roadmap on silicon photonics David Thomson1,10,11, Aaron Zilkie2, John E Bowers3, Tin Komljenovic3, Graham T Reed1, Laurent Vivien4, Delphine Marris-Morini4, Eric Cassan4, Léopold Virot5,6, Jean-Marc Fédéli5,6, Jean-Michel Hartmann5,6, Jens H Schmid7, Dan-Xia Xu7, Frédéric Boeuf8, Peter O’Brien9, Goran Z Mashanovich1 and M Nedeljkovic1 1 Optoelectronics Research Centre, University of Southampton, Southampton, SO17 1BJ, UK 2 Rockley Photonics Inc., 234 E. Colorado Blvd, Suite 600, Pasadena, CA, 91101, USA 3 University of California, Santa Barbara, Electrical and Computer Engineering Department, Santa Barbara, CA 93106, USA 4 Centre for Nanoscience and Nanotechnology (C2N), CNRS, Université Paris Sud, Université Paris- Saclay, France 5 University of Grenoble Alpes, F-38000 Grenoble, France 6 CEA, LETI, Minatec Campus, 17 rue des Martyrs, F-38054 Grenoble, France 7 Information and Communications Technologies Portfolio, National Research Council of Canada, 1200 Montreal Road, Ottawa, Ontario K1A 0R6, Canada 8 STMicroelectronics (Crolles 2) SAS, 850 Rue Jean Monnet, BP 16, Crolles Cedex, France 9 Tyndall National Institute, University College Cork, Cork, Ireland E-mail: [email protected] Received 18 September 2015 Accepted for publication 24 February 2016 Published 24 June 2016 Abstract Silicon photonics research can be dated back to the 1980s. -
Inverse Design for Silicon Photonics: from Iterative Optimization Algorithms to Deep Neural Networks
applied sciences Review Inverse Design for Silicon Photonics: From Iterative Optimization Algorithms to Deep Neural Networks Simei Mao 1,2, Lirong Cheng 1,2 , Caiyue Zhao 1,2, Faisal Nadeem Khan 2, Qian Li 3 and H. Y. Fu 1,2,* 1 Tsinghua-Berkeley Shenzhen Institute, Tsinghua University, Shenzhen 518055, China; [email protected] (S.M.); [email protected] (L.C.); [email protected] (C.Z.) 2 Tsinghua Shenzhen International Graduate School, Tsinghua University, Shenzhen 518055, China; [email protected] 3 School of Electronic and Computer Engineering, Peking University, Shenzhen 518055, China; [email protected] * Correspondence: [email protected]; Tel.: +86-755-3688-1498 Abstract: Silicon photonics is a low-cost and versatile platform for various applications. For design of silicon photonic devices, the light-material interaction within its complex subwavelength geometry is difficult to investigate analytically and therefore numerical simulations are majorly adopted. To make the design process more time-efficient and to improve the device performance to its physical limits, various methods have been proposed over the past few years to manipulate the geometries of silicon platform for specific applications. In this review paper, we summarize the design methodologies for silicon photonics including iterative optimization algorithms and deep neural networks. In case of iterative optimization methods, we discuss them in different scenarios in the sequence of increased degrees of freedom: empirical structure, QR-code like structure and irregular structure. We also review inverse design approaches assisted by deep neural networks, which generate multiple devices Citation: Mao, S.; Cheng, L.; Zhao, with similar structure much faster than iterative optimization methods and are thus suitable in C.; Khan, F.N.; Li, Q.; Fu, H.Y. -
Recent Advances in Silicon Photonic Integrated Circuits John E
Invited Paper Recent Advances in Silicon Photonic Integrated Circuits John E. Bowers*, Tin Komljenovic, Michael Davenport, Jared Hulme, Alan Y. Liu, Christos T. Santis, Alexander Spott, Sudharsanan Srinivasan, Eric J. Stanton, Chong Zhang Department of Electrical and Computer Engineering, University of California, Santa Barbara, CA 93106, USA *[email protected] ABSTRACT We review recent breakthroughs in silicon photonics technology and components and describe progress in silicon photonic integrated circuits. Heterogeneous silicon photonics has recently demonstrated performance that significantly outperforms native III-V components. The impact active silicon photonic integrated circuits could have on interconnects, telecommunications, sensors and silicon electronics is reviewed. Keywords: Heterogeneous silicon platform, integrated optoelectronics, optoelectronic devices, semiconductor lasers, silicon-on-insulator (SOI) technology, silicon photonics 1. INTRODUCTION Heterogeneous silicon photonics, due to its potential for medium- and large-scale integration, has been intensively researched. Recent developments have shown that heterogeneous integration not only allows for a reduced cost due to economy of scale, but also allows for same or even better performing devices than what has previously been demonstrated utilizing only III-V materials. Furthermore we believe that optical interconnects are the only way to solve the scaling limitation in modern processors, and that heterogeneous silicon photonics with on-chip sources is the best approach in the long term as it promises higher efficiency and lower cost. We address both beliefs in sections that follow. In this paper we plan to briefly address heterogeneous silicon approaches, and point-out that the heterogeneous silicon platform is more than just III-V on silicon but can have advantages for isolators, circulators and nonlinear devices (Section 2). -
Underwater Transformer
ALL ABOARD THE THE LAST A FORGOTTEN MICROGRIDS HYDROGEN TRAIN TRANSISTOR? REVOLUTION GO MOBILE Fuel cells go the Nanosheet devices and Why switching power A new and cleaner extra mile the end of Moore’s Law supplies triumphed way to power a ferry P. 06 P. 30 P. 36 P. 42 THIS UNTETHERED HALF HUMANOID WILL WORK ON OFFSHORE OIL RIGS AND GO DEEPER THAN FOR THE FOR THE TECHNOLOGY INSIDERTECHNOLOGY | 08.19 HUMAN DIVERS INSIDER P. 22 08.19 THE UNDERWATER TRANSFORMER Subscriber Address Box Zurich Instruments ∏ Arbitrary Waveform Generators ∏ Impedance Analyzers ∏ Lock-in Amplifiers ∏ Quantum Computing Control Systems experience LabOne LabOne® provides users with a platform independent instrument control including proven measurement methodo- logies. It's designed to offer a great amount of flexibility for instrument usage and assures quick and efficient ope- ration. The browser based user interface provides an outstanding toolset for time and frequency domain analysis as well as sophisticated support to set up control loops, making noise measure- ments or to interpret measurement data. Let's discuss your application Intl. +41 44 515 0410 USA 855-500-0056 (Toll Free) [email protected] www.zhinst.com CONTENTS_08.19 THE UNDER- WATER 30 THE LAST 36 THE QUIET 42 HAPPINESS IS 06 NEWS SILICON REMAKING OF A HYBRID-ELECTRIC 14 RESOURCES TRANSFORMER TRANSISTOR COMPUTER POWER FERRY 04 OPINION The next step in SUPPLIES The retrofitted 52 PAST FORWARD A startup founded by ex-NASA the evolution of the Here’s how the ship offers a clean, engineers wants to upend subsea transistor is the compact and efficient quiet ride for 4,500 nanosheet device. -
Photonics and Optoelectronics
Photonics and Optoelectronics Effects of Line Edge Roughness on Photonic Device Performance through Virtual Fabrication ...................................... 43 Reprogrammable Electro-Chemo-Optical Devices ............................................................................................................... 44 On-chip Infrared Chemical Sensor Leveraging Supercontinuum Generation in GeSbSe Chalcogenide Glass Waveguide ............................................................................................................................... 45 Sensing Chemicals in the mid-Infrared using Chalcogenide Glass Waveguides and PbTe Detectors Monolithically Integrated On-chip ......................................................................................................... 46 Broadband Low-loss Nonvolatile Photonic Switches Based on Optical Phase Change Materials (O-PCMs) ............... 47 Chalcogenide Glass Waveguide-integrated Black Phosphorus mid-Infrared Photodetectors .......................................... 48 An Ultrasensitive Graphene-polymer Thermo-mechanical Bolometer ................................................................................ 49 Nanocavity Design for Reduced Spectral Diffusion of Solid-state Defects ......................................................................... 50 Two-dimensional Photonic Crystal Cavities in Bulk Single-crystal Diamond ....................................................................... 51 Quasi-Bessel-Beam Generation using Integrated Optical Phased Arrays .......................................................................... -
Development of a First-Generation Miniature Multiple Reference Optical Coherence Tomography Imaging Device
Development of a first-generation miniature multiple reference optical coherence tomography imaging device Paul M. McNamara Roshan Dsouza Colm O’Riordan Seán Collins Peter O’Brien Carol Wilson Josh Hogan Martin J. Leahy Paul M. McNamara, Roshan Dsouza, Colm O’Riordan, Seán Collins, Peter O’Brien, Carol Wilson, Josh Hogan, Martin J. Leahy, “Development of a first-generation miniature multiple reference optical coherence tomography imaging device,” J. Biomed. Opt. 21(12), 126020 (2016), doi: 10.1117/1.JBO.21.12.126020. Downloaded From: http://biomedicaloptics.spiedigitallibrary.org/ on 01/02/2017 Terms of Use: http://spiedigitallibrary.org/ss/termsofuse.aspx Journal of Biomedical Optics 21(12), 126020 (December 2016) Development of a first-generation miniature multiple reference optical coherence tomography imaging device Paul M. McNamara,a,b,* Roshan Dsouza,a,b Colm O’Riordan,c Seán Collins,c Peter O’Brien,c Carol Wilson,b Josh Hogan,b and Martin J. Leahya aNational University of Ireland, School of Physics, Tissue Optics and Microcirculation Imaging Group, National Biophotonics and Imaging Platform, Galway H91 CF50, Ireland bCompact Imaging Inc., 897 Independence Avenue, Suite 5B, Mountain View, California 94043, United States cIrish Photonic Integration Centre (IPIC), Tyndall National Institute, Lee Maltings Complex, Dyke Parade, Cork T12 R5CP, Ireland Abstract. Multiple reference optical coherence tomography (MR-OCT) is a technology ideally suited to low-cost, compact OCT imaging. This modality is an extension of time-domain OCT with the addition of a partial mirror in front of the reference mirror. This enables extended, simultaneous depth scanning with the relatively short scan range of a miniature voice coil motor on which the scanning mirror is mounted.