Download or read book Ultrafast High Power Photodetectors written by and published by . This book was released on 1999 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The goal of the proposed research is to develop new photodetectors that are capable of high power operation at high frequencies for microwave fiber optic link applications. Conventional high frequency photodetectors have low saturation power because of the small absorption volume required to reduce transit time and parasitic capacitance. We have proposed a novel velocity-matched distributed photodetector (VMDP) that can achieve high bandwidth and high saturation power simultaneously. During the performance period, we have successfully demonstrated three generations of long-wavelength VMDP's operating at 1.3 and 1.55 mm fiber optic communication wavelengths. The VMDP consisting of metal-semiconductor-metal (MSM) photodiodes serially connected by an optical core optical waveguide and an coplanar strip microwave transmission line that is velocity-matched to the optical waveguide. The MSM phodiodes have been patterned by both optical and e-beam lithography. We have demonstrated a bandwidth of 18 GHz and a quantum efficiency of 0.42 A/W. The maximum linear photocurrent measured is 12 mA. The distribution of photocurrents inside the VMDP has also been measured using a novel split contact structure. Test patterns on nanoscale MSM photodiodes show a bandwidth> 50 GHz (measurement limit). The research results achieved in this program has been transferred to TRW, Focused Research, and BAE. TRW has provided additional funding for transfer the technology to TRW. Focused Research has obtained a Phase II SBIR to commercialize VMDP.
Download or read book Ultrafast All Optical Signal Processing Devices written by Dr. Hiroshi Ishikawa and published by John Wiley & Sons. This book was released on 2008-09-15 with total page 258 pages. Available in PDF, EPUB and Kindle. Book excerpt: Semiconductor-based Ultra-Fast All-Optical Signal Processing Devices –a key technology for the next generation of ultrahigh bandwidth optical communication systems! The introduction of ultra-fast communication systems based on all-optical signal processing is considered to be one of the most promising ways to handle the rapidly increasing global communication traffic. Such systems will enable real time super-high definition moving pictures such as high reality TV-conference, remote diagnosis and surgery, cinema entertainment and many other applications with small power consumption. The key issue to realize such systems is to develop ultra-fast optical devices such as light sources, all-optical gates and wavelength converters. Ultra-Fast All-Optical Signal Processing Devices discusses the state of the art development of semiconductor-based ultrafast all-optical devices, and their various signal processing applications for bit-rates 100Gb/s to 1Tb/s. Ultra-Fast All-Optical Signal Processing Devices: Provides a thorough and in-depth treatment of the most recent achievements in ultrafast all-optical devices Discusses future networks with applications such as HD-TV and super-high definition moving screens as a motivating background for devices research Covers mode-locked semiconductor lasers, electro-absorption modulator based 160Gb/s signal sources, SOA based symmetric Mach-Zehnder type all-optical gates, intersubband transition gate device, and more Explains the technical issues behind turning the ultra-fast optical devices into practical working tools Examples of above 160Gb/s transmission experiments Discusses future prospects of the ultra-fast signal processing devices This invaluable reference will provide device researchers and engineers in industry, researchers at universities (including graduate students, and post doctorial researchers and professors) and research institutes with a thorough understanding of ultrahigh bandwidth optical communication systems. Device and communication market watchers will also find this book useful.
Download or read book Ultrahigh Speed Optical Transmission Technology written by Hans-Georg Weber and published by Springer Science & Business Media. This book was released on 2007-12-28 with total page 476 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is a detailed description of all the aspects of ultrahigh speed optical transmission technology. Ultrahigh-speed optical transmission technology is a key technology for increasing communication capacity. The devices developed for ultrahigh-speed optical transmission are not limited to communication applications only. They are key devices for high-speed optical signal processing, i.e. monitoring, measurement and control, and will thus give a wide technological basis for innovative science and technology. All these aspects of ultrahigh-speed optical transmission technology are described in detail in this book.
Download or read book Official Gazette of the United States Patent and Trademark Office written by and published by . This book was released on 2003 with total page 944 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Ultrafast Photodetectors with High Efficiency written by Lih-Yuan Lin and published by . This book was released on 1993 with total page 132 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book LEOS written by and published by . This book was released on 1994 with total page 296 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Optical Fiber Telecommunications Volume VIA written by Ivan Kaminow and published by Academic Press. This book was released on 2013-05-03 with total page 795 pages. Available in PDF, EPUB and Kindle. Book excerpt: Optical Fiber Telecommunications VI (A&B) is the sixth in a series that has chronicled the progress in the R&D of lightwave communications since the early 1970s. Written by active authorities from academia and industry, this edition brings a fresh look to many essential topics, including devices, subsystems, systems and networks. A central theme is the enabling of high-bandwidth communications in a cost-effective manner for the development of customer applications. These volumes are an ideal reference for R&D engineers and managers, optical systems implementers, university researchers and students, network operators, and investors. Volume A is devoted to components and subsystems, including photonic integrated circuits, multicore and few-mode fibers, photonic crystals, silicon photonics, signal processing, and optical interconnections.
Download or read book Optical Fiber Telecommunications VIA written by Andreas Beling and published by Elsevier Inc. Chapters. This book was released on 2013-05-03 with total page 86 pages. Available in PDF, EPUB and Kindle. Book excerpt: This chapter reviews the significant advances in photodetectors that have occurred since Optical Fiber Telecommunications V. The quests for higher speed p-i-n detectors and lower noise avalanche photodiodes (APDs) with high gain-bandwidth product remain. To a great extent, high-speed structures have coalesced to evanescently coupled waveguide devices; bandwidths exceeding 140GHz have been reported. A primary APD breakthrough has been the development of Ge on Si separate-absorption-and-multiplication devices that achieve long-wavelength response with the low-noise behavior of Si. For III–V compound APDs ultra-low noise has been achieved by strategic use of complex multilayer multiplication regions that provide more deterministic impact ionization. However, much of the excitement and innovation have focused on photodiodes that can be incorporated into InP-based integrated circuits and photodetectors for Si photonics.
Download or read book Derer zur kayserl Commision in denen ost friesischen Landes Differentien subdelegirten R the Patentes wieder die von denen vorigen Administratoren beschehene Occupirung Sub Dato Aurich d 7 Martii 1726 written by and published by . This book was released on 1726 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Advances in Photodetectors written by Kuan Chee and published by . This book was released on 2019-09-18 with total page 180 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book provides a wide-ranging overview of the current state-of-the-art and new trends in photodetector design and research. Written by a team of internationally renowned experts, with contributions from universities, research institutes and industries, this work is suitable for students and professionals interested in studying and dealing with photodetector design and technology, as well as the wide gamut of related applications. Its coverage includes: physics and fundamentals of photodetectors; physical models of photodetector operation; new materials, design, processing and function of photodetectors in related applications; testing, monitoring and calibration; and research progress in photodetector-related areas. Theoretical aspects, design and simulation principles, and important experimental results are thoroughly addressed, embodying a comprehensive account of current activity in this important field of research and industry.
Download or read book High Performance Ultrafast Photodetectors written by and published by . This book was released on 1999 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: This project concentrates on the design, fabrication and characterization of compound semiconductor photodetectors in various material systems operating at near-IR wavelengths. We utilize resonant cavity enhanced (RCE) detection scheme to optimize speed and responsivity of photodetectors. It is also desirable to combine multiple functions in a single photodetector structure. In addition to wavelength selectivity of RCE photodetectors, we have demonstrated that RCE detectors vertically integrated with one-pass detectors can be used for polarization sensing. We have fabricated RCE photodetectors working at 800 to 900 nm wavelength range with record bandwidth-efficiency products. RCE Schottky photodiodes with 100 GHz bandwidth, p-i-n photodiodes with 50 GHz bandwidth and near-unity quantum efficiency have been demonstrated.
Download or read book Miniaturized Silicon Photodetectors written by Maurizio Casalino and published by MDPI. This book was released on 2021-01-15 with total page 148 pages. Available in PDF, EPUB and Kindle. Book excerpt: Silicon (Si) technologies provide an excellent platform for the design of microsystems where photonic and microelectronic functionalities are monolithically integrated on the same substrate. In recent years, a variety of passive and active Si photonic devices have been developed, and among them, photodetectors have attracted particular interest from the scientific community. Si photodiodes are typically designed to operate at visible wavelengths, but, unfortunately, their employment in the infrared (IR) range is limited due to the neglectable Si absorption over 1100 nm, even though the use of germanium (Ge) grown on Si has historically allowed operations to be extended up to 1550 nm. In recent years, significant progress has been achieved both by improving the performance of Si-based photodetectors in the visible range and by extending their operation to infrared wavelengths. Near-infrared (NIR) SiGe photodetectors have been demonstrated to have a “zero change” CMOS process flow, while the investigation of new effects and structures has shown that an all-Si approach could be a viable option to construct devices comparable with Ge technology. In addition, the capability to integrate new emerging 2D and 3D materials with Si, together with the capability of manufacturing devices at the nanometric scale, has led to the development of new device families with unexpected performance. Accordingly, this Special Issue of Micromachines seeks to showcase research papers, short communications, and review articles that show the most recent advances in the field of silicon photodetectors and their respective applications.
Download or read book Self Assembly of Nanostructures written by Stefano Bellucci and published by Springer Science & Business Media. This book was released on 2011-10-27 with total page 278 pages. Available in PDF, EPUB and Kindle. Book excerpt: This is the third volume in a series of books on selected topics in Nanoscale Science and Technology based on lectures given at the well-known Istituto Nazionale di Fisica Nucleare (INFN) schools of the same name. The present set of notes stems in particular from the participation and dedication of prestigious lecturers, such as Nunzio Motta, Fulvia Patella, Alexandr Toropov, and Anna Sgarlata. All lectures have been carefully edited and reworked, taking into account extensive follow-up discussions. A tutorial lecture by Motta et al. presents the analysis of the Poly(3-hexylthiophene) self assembly on carbon nanotubes and discusses how the interaction between the two materials forms a new hybrid nanostructure, with potential application to future solar cells technology. In their contribution, Patella et al. review quantum dots of III-V compounds, which offer appealing perspectives for more sophisticated applications in new generation devices such as single-photon emitters for nano-photonics and quantum computing. Focusing on self-assembled quantum dots, the chapter by Alexandr Toropov et al. provides a comprehensive review of some important aspects in the formation of quantum dots and presents the results of the authors’ extensive investigation of the features of droplet epitaxy. The fourth contribution, by Sgarlata et al., focuses on recent progress toward controlled growth of self-assembled nanostructures, dealing with the shaping, ordering and localization in Ge/Si heteroepitaxy and reviewing recent results on the self-organization of Ge nanostructures at Si surfaces.
Download or read book International Conference on Indium Phosphide and Related Materials written by and published by . This book was released on 2000 with total page 602 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Fibre Optic Communication written by Herbert Venghaus and published by Springer. This book was released on 2017-01-20 with total page 873 pages. Available in PDF, EPUB and Kindle. Book excerpt: The book gives an in-depth description of key devices of current and next generation fibre optic communication networks. Devices treated include semiconductor lasers, optical amplifiers, modulators, wavelength filters and other passives, detectors, all-optical switches, but relevant properties of optical fibres and network aspects are included as well. The presentations include the physical principles underlying the various devices, technologies used for their realization, typical performance characteristics and limitations, but development trends towards more advanced components are also illustrated. This new edition of a successful book was expanded and updated extensively. The new edition covers among others lasers for optical communication, optical switches, hybrid integration, monolithic integration and silicon photonics. The main focus is on Indium phosphide-based structures but silicon photonics is included as well. The book covers relevant principles, state-of-the-art implementations, status of current research as well as expected future components.
Download or read book Handbook of II VI Semiconductor Based Sensors and Radiation Detectors written by Ghenadii Korotcenkov and published by Springer Nature. This book was released on 2023-02-02 with total page 527 pages. Available in PDF, EPUB and Kindle. Book excerpt: Three-volumes book “Handbook of II-VI Semiconductor-Based Sensors and Radiation Detectors” is the first to cover both chemical sensors and biosensors and all types of photodetectors and radiation detectors based on II-VI semiconductors. It contains a comprehensive and detailed analysis of all aspects of the application of II-VI semiconductors in these devices. The second volume “Photodetectors” of a three-volume set, focus on the consideration of all types of optical detectors, including IR detectors, visible and UV photodetectors. This consideration includes both the fundamentals of the operation of detectors and the peculiarities of their manufacture and use. In particular, describes numerous strategies for their fabrication and characterization. An analysis of new trends in development of II-VI semiconductors-based photodetectors such as graphene/HgCdTe-, nanowire- and quantum dot-based photodetectors, as well as solution-processed, multicolor, flexible and self-powered photodetectors, are also given.
Download or read book 15th European Workshop on Metalorganic Vapour Phase Epitaxy EWMOVPE XV written by and published by Forschungszentrum Jülich. This book was released on 2013 with total page 415 pages. Available in PDF, EPUB and Kindle. Book excerpt:
