Download or read book Advanced Technologies for Next Generation Optical Transceivers in Long Haul Transport Links and Short Reach Interconnects written by Mohamed Osman and published by . This book was released on 2016 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: "The burgeoning capacity demand for both optical transport links over metro / long-haul distances (> 100km) and short reach optical interconnects (100m-20km) for inter- and intra-datacenter networking is driving the notion of a digital signal processing (DSP) based optical transceiver. In optical transport, flexible optical transceivers employ coherent detection and DSP to enable mitigating various fiber transmission impairments such as chromatic dispersion (CD), polarization mode dispersion (PMD), Kerr nonlinearity, laser phase noise and frequency offset. In addition, these flexible transceivers need to be agile enough to adapt to the increasingly dynamic network traffic needs (e.g. varying capacity and reach requirements, dynamic wavelength assignments). On the short reach side, cheap and power efficient optics is a necessity for datacenter applications and hence intensity modulation / direct-detection (IM/DD) prevails over coherent detection. For such IM/DD transceivers, photonic integration is envisioned to play a significant role in reducing the cost along with DSP that potentially allows increasing the delivered bit rates with cheap electronics and reduced number of optical components (and consequently footprint).In the first part of the thesis, we propose and verify, both analytically and experimentally, a myriad of DSP algorithms suitable for implementation in flexible optical coherent transceivers for transport networks. The proposed DSP algorithms tackle impairments such as laser phase noise, frequency offset, polarization rotation, fiber Kerr nonlinearity and sampling frequency offset. For each of the proposed algorithms, we provide a performance comparison with the standard counterparts in the literature highlighting the advantages of our approaches together with the underlying tradeoffs. Next, we develop and experimentally verify a rigorously derived analytical model for performance evaluation of a flexible coherent optical front-end that can operate colorlessly in a wavelength division multiplexing (WDM) scenario, i.e. without the need for a WDM demultiplexing filter prior to the receiver. The accuracy of the developed model was proved by finding a close match between model predictions and experimental results. We finally show that the model can be used as a useful system design tool to predict the system performance at various operating scenarios.In the last part of the thesis, we propose a DSP algorithm to enable polarization division multiplexing (PDM) in IM/DD transceivers for short reach optical interconnects. This doubles the achievable bit rate with the same speed of the electronic components and with the same number of light sources by exploiting the two orthogonal polarization states per source. The proposed DSP algorithm is based on a multiple-input and multiple-output (MIMO) finite impulse response (FIR) filter that operates on the Stokes parameters of the received field, which can be obtained via a direct-detection receiver front-end, to invert the random rotations that occurred along the fiber. The proposed DSP was verified experimentally using an IM/DD transceiver that employs a single 1310 nm laser whose both polarizations were modulated by a packaged silicon photonic (SiP) intensity modulator. A record bit rate of 224 Gb/s was transmitted over 10 km with a BER below the forward-error-correcting (FEC) threshold." --

Download or read book High speed Optical Transceivers Integrated Circuits Designs And Optical Devices Techniques written by Yuyu Liu and published by World Scientific. This book was released on 2006-03-09 with total page 242 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book explores the unique advantages and large inherent transmission capacity of optical fiber communication systems. The long-term and high-risk research challenges of optical transceivers are analyzed with a view to sustaining the seemingly insatiable demand for bandwidth. A broad coverage of topics relating to the design of high-speed optical devices and integrated circuits, oriented to low power, low cost, and small area, is discussed.Written by specialists with many years of research and engineering experience in the field of optical fiber communication, this book is essential for an audience dedicated to the development of integrated electronic systems for optical communication applications. It can also be used as a supplementary text for graduate courses on optical transceiver IC design.

Download or read book Advanced Optical Transceiver for Data Center and Metro Transport written by Minh Thang Hoang and published by . This book was released on 2018 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: "As data center traffic increases, challenges rise for existing optical transceivers. For data center interconnects (DCIs) transmission distance matters and drives specifications of optical transceivers. For metro and long reach DCIs (>100 km), high bit rate and small form factor is imperative for next-generation transceiver. The advent of high speed digital-to-analog (DAC) and analog-to-digital converters (ADC), and recent progress in complementary metal-oxide-semiconductor (CMOS) as well as in integrated photonic technology has facilitated the development of optical transceivers relying on coherent detection employing digital signal processing (DSP). On extended reach DCIs (

Download or read book Handbook of Optical Interconnects written by Shigeru Kawai and published by CRC Press. This book was released on 2018-10-03 with total page 480 pages. Available in PDF, EPUB and Kindle. Book excerpt: As we reach the data transmission limits of copper wire and communications experts seek to bring the speed of long-haul fiber optics networks closer to access points, optical interconnects promise to provide efficient, high-speed data transmission for the next generation of networks and systems. They offer higher bit-rates, virtually no crosstalk, lower demands on power requirements and thermal management, and the possibility of two-dimensional channel arrays for chip-to-chip communication. The Handbook of Optical Interconnects introduces the systems and devices that will bring the speed and quality of optical transmission closer to the circuit board. Contributed by active experts, most from leading technology companies in the US and Japan, this outstanding handbook details various low-cost and small-size configurations, illustrates the discussion with more than 300 figures, and offers a look at the applications and future of this exciting and rapidly growing field. The book includes a detailed introduction to vertical cavity surface-emitting lasers (VCSELs); the use of optical interconnects in metropolitan, local-area, and access networks through FTTP (FTTH); and Jisso technologies, which are critical for developing low-cost, small-size modules. Driving down the size and cost of optical interconnects is vital for integrating these technologies into the network and onto microprocessors, and the Handbook of Optical Interconnects provides the knowledge and tools necessary to accomplish these goals.

Download or read book Advanced Technologies for Next Generation Coherent Optical Communications written by Qunbi Zhuge and published by . This book was released on 2015 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: "Next generation coherent optical transports for core networks are anticipated to further approach the Shannon limit for a higher fiber capacity by delivering 400 Gb/s or 1 Tb/s data rates per channel, and providing flexibility and agility to maximize the network resource utilization. This thesis looks into novel system architectures and digital signal processing (DSP) algorithms to fulfill those design targets. The single carrier and orthogonal frequency-division multiplexing (OFDM) modulation schemes are both potential candidates for the underlying transceiver architecture. We provide the analysis and investigation of the optical channel impairments for both systems in the context of >100 Gb/s transmissions with higher symbol rates and higher order quadrature amplitude modulation (QAM). With an increased accumulated chromatic dispersion (CD) for a single channel, the impacts of laser phase noise and fiber nonlinearities manifest new characteristics which are not evident in current 100G systems. We propose novel and energy-efficient DSP algorithms and system designs to increase laser linewidth tolerance and reduce nonlinear noise. The performances of the proposed designs are experimentally evaluated using a leading-edge optical long-haul transmission testbed, which was custom built for this thesis. The single carrier and OFDM systems are separately explored and compared, and it is shown that OFDM has certain multi-carrier advantages when a large accumulated CD exists. This result implies that the OFDM scheme may be a better option for next generation transceivers than the currently employed 100G single carrier transceiver scheme. In the last part, we concentrate on the design of flexible optical transceivers for future software-defined optical networks. The following novel techniques are proposed to achieve a full flexibility without increasing the cost: format-transparent DSP platform, agile bandwidth allocation, and continuous modulation format." --

Download or read book Optical Communications written by Alberto Paradisi and published by Springer. This book was released on 2018-09-04 with total page 261 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book focuses on recent research and developments on optical communications. The chapters present different aspects of optical communication systems, comprising high capacity transmission over long distances, coherent and intensity modulated technologies, orthogonal frequency-division multiplexing, ultrafast switching techniques, and photonic integrated devices. Digital signal processing and error correction techniques are also addressed. The content is of interest to graduate students and researchers in optical communications.

Download or read book Next Generation High Speed High Density Optical Interconnects written by and published by Information Gatekeepers Inc. This book was released on with total page 31 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Handbook of Fiber Optic Data Communication written by Bert Jan Offrein and published by Elsevier Inc. Chapters. This book was released on 2013-08-09 with total page 25 pages. Available in PDF, EPUB and Kindle. Book excerpt: This chapter reviews electro-optical packaging and integration technologies for short distance optical communication. With increasing system performance and bandwidth requirements, optical communication is applied for ever shorter distances. Consequently, novel packaging strategies are required that enable a close integration of optical technology within the system. Today, pluggable transceivers are applied at the system edge and embedded optical modules for onboard assembly are emerging in bandwidth hungry applications. The first high-performance computing systems are now on the market in which optical transceivers are mounted onto the switch chip package. Still, cost and assembly efforts related to optics hinder a more widespread application of optical link technology. Integration strategies at all levels are required to enhance performance and functionality of optics, while reducing cost. Optical printed circuit board technology and integrated photonics offer tight integration between electrical and optical functions.

Download or read book Advanced Transceivers for Next Generation Optical Networks written by Steven KwokHay Fong and published by . This book was released on 2001 with total page 222 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Optical Communications and Networking written by Zhongqi Pan and published by MDPI. This book was released on 2020-03-10 with total page 132 pages. Available in PDF, EPUB and Kindle. Book excerpt: In the past few decades, the optical communication industry has explored multiple degrees of freedom of the photon, such as time, wavelength, amplitude, phase, polarization, and space, to significantly reduce the cost/bit of data transmission by increasing the capacity per fiber through multiplexing technology and by reducing the size and power through electronic and photonic integration. This book aims to explore the latest advancements in this industry, including the technologies in devices, systems, and network levels with applications from short-reach chip-to-chip interconnections to long-haul backbone communications at the trans-oceanic distance.

Download or read book Optical Wireless Communications written by Murat Uysal and published by Springer. This book was released on 2016-08-25 with total page 639 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book focuses on optical wireless communications (OWC), an emerging technology with huge potential for the provision of pervasive and reliable next-generation communications networks. It shows how the development of novel and efficient wireless technologies can contribute to a range of transmission links essential for the heterogeneous networks of the future to support various communications services and traffic patterns with ever-increasing demands for higher data-transfer rates. The book starts with a chapter reviewing the OWC field, which explains different sub-technologies (visible-light, ultraviolet (UV) and infrared (IR) communications) and introduces the spectrum of application areas (indoor, vehicular, terrestrial, underwater, intersatellite, deep space, etc.). This provides readers with the necessary background information to understand the specialist material in the main body of the book, which is in four parts. The first of these deals with propagation modelling and channel characterization of OWC channels at different spectral bands and with different applications. The second starts by providing a unified information-theoretic treatment of OWC and then discusses advanced physical-layer methodologies (including, but not limited to: advanced coding, modulation diversity, cooperation and multi-carrier techniques) and the ultimate limitations imposed by practical constraints. On top of the physical layer come the upper-layer protocols and cross-layer designs that are the subject of the third part of the book. The last part of the book features a chapter-by-chapter assessment of selected OWC applications. Optical Wireless Communications is a valuable reference guide for academic researchers and practitioners concerned with the future development of the world’s communication networks. It succinctly but comprehensively presents the latest advances in the field.

Download or read book Frontiers of Optical Networking Technologies written by Yu-Ting Hsueh and published by . This book was released on 2012 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The enabling technologies and the issues of next-generation millimeter-wave wireless access network and 100G long-haul optical transport network were developed and identified. To develop a simple and cost-effective millimeter-wave optical-wireless system, all-round research on the technical challenges of optical millimeter-wave generation, transmission impairments compensation, and simple base station design were discussed. Several radio-over-fiber systems were designed to simultaneously deliver multi-band wireless services on a single optical infrastructure, enabling converged system control and quality maintenance in central office. For the 100G optical transport network, the issues related to successful implementations of transmitter, fiber link, and receiver of a 112-Gb/s polarization-division multiplexing-quadrature phase shift keying (PDM-QPSK) system were comprehensively explored. The experimental results based on the constructed 112-Gb/s testbed indicated that careful dispersion management can effectively increase nonlinearity tolerance. Furthermore, the special emphasis on the two impairments of the 100G network with reconfigurable optical add-drop multiplexers: passband narrowing and in-band crosstalk, was studied. The results demonstrated that these impairments can be readily predicted with proper experimental and simulation efforts.

Download or read book Optical Communications for Long haul Short reach and Chip scale Distances Enabled by Digital Signal Processing written by Mathieu Chagnon and published by . This book was released on 2016 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: "This thesis covers three topics of optical communications. First, we address long-haul fiberoptic coherent systems and propose a solution to two specific problems: polarization recovery and fiber nonlinearity. Second, we study silicon photonic devices for passive all-optical signal processing and active optical signal modulation enabling dense integration of photonics with advanced microelectronics. Finally, we address the need for faster short-reach transceivers in intra- and inter-data center networks by proposing novel modulation formats, digital signal processing algorithms, and transceiver architectures for Stokes vector modulation and demodulation. The thesis covers a large range of optical transmission distances, from long-haul to chip-scale photonics including short-reach optics for data center networks, all enabled by digital signal processing at both the transmitter and receiver. In the case of long-haul fiber-optic coherent systems, we propose a blind and fast algorithm allowing recovering the state of polarization of any Dual-Polarization square M-ary Quadrature Amplitude Modulation (DP-MQAM) format. The algorithm allows a significant reduction of the convergence time for any polarization orientation at the receiver compared to the traditional blind derotation method. We also propose a complex modulation format being a power constrained version of the Dual-Polarization-8QAM format and we analytically and experimentally demonstrate greater tolerance to nonlinear effects. For chip-scale photonic devices, the thesis contains a thorough study of wavelength multicasting using the parametric process of four-wave-mixing in a silicon-on-insulator photonic waveguide where we demonstrate a 1-to-6 multicast of a 16QAM signal and study the impact on performance of the input and output fiber-chip couplers. We also characterize the performance of the first silicon Mach-Zehnder intensity modulator enabling 112 Gb/s using 8-level intensity modulation for CMOS integrated interconnects. Finally, for optical communications targeting data center applications covering the range of 0.5 to 10 km, we present novel transceivers, modulation formats, and digital signal processing schemes for next generation single wavelength high-speed pluggables. We demonstrate the first transmission of 112 Gb/s over 10 km of single mode fiber in a silicon photonics modulator using 4-level pulse amplitude modulation (PAM), compliant with IEEE©'s new physical specifications of 56 Gbaud signaling and PAM-4 format. The thesis also reports the first demonstration of a 300 Gb/s transceiver enabled by digital to analog and analog to digital converters and novel digital signal processing algorithms where we modulate 6 bits of information per symbol on a single laser source and demodulate with a direct detection Stokes-vector receiver.We conclude this thesis with a summary of the research presented and possible future research to follow those addressed in this work." --

Download or read book The ComSoc Guide to Next Generation Optical Transport written by Huub van Helvoort and published by Wiley-IEEE Press. This book was released on 2009-10-12 with total page 224 pages. Available in PDF, EPUB and Kindle. Book excerpt: A comprehensive guide to SDH, SONET, and OTN The ComSoc Guide to Next Generation Optical Transport provides a unique overview of SDH and OTN for engineers who are new to the field, as well as manufacturers, network operators, and graduate students who need a basic understanding of the topics. Fully up-to-date with the latest research and written by one of the foremost experts in the field, it covers: Network architectures Frames and structures Network modeling Packet transport network modeling Frequency justification Protection mechanisms Mapping methodologies Concatenation SDH and SONET overhead processing The book is complemented with 200 illustrations that explain key concepts in an easy-to-understand format, while references point readers to the appropriate standards documents for further reading. Whether you're new to the field or just need a basic understanding of SDH, this is a must-have guide.

Download or read book Advanced Optical Networking Technologies for Next Generation Optical written by Gee-Kung Chang and published by . This book was released on 2004 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Next Generation High Speed and High Capacity Optical Interconnect written by Ismail Tawfik and published by LAP Lambert Academic Publishing. This book was released on 2015-06-09 with total page 144 pages. Available in PDF, EPUB and Kindle. Book excerpt: Tawfik researches are focused on WDM-OPS architectures technology based on wavelength optical converters with fixed, tuneable, parametric, and exchanging. With his supervisors, we have been developed several OPS architectures using FDLs, Tuneable wavelength converters, and recently using wavelength exchangers. All of these architectures are designed to process the data in the optical domain. In our designs, we implement either analytical and/or simulation model for each proposed architecture. Tawfik researches are going in depth in physical behaviours of photonic devices such as photonic crystals and nonlinear fiber optics. We studied the nonlinear haracterizations as three and four wave mixing to implement some optical switch's elements like De/MUX, wavelength converter, wavelength exchanger, and space switch.

Download or read book Event driven Dynamic Power on for Giga bit Very Short Reach Optical Transceivers written by and published by . This book was released on 2006 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: While there have been endless efforts in the exploration of low-threshold VCSELs, high-responsivity photo detectors and power-efficient transceiver circuits, this research explores the possibility of achieving power savings in the domain of dynamic power management of optical transceivers. The research includes the development of the new concept of optic wake-on-link, a dynamic power-on technique for optical transceivers, the characterization and performance analysis, the physical design and implementation, and the experimental schemes. First, the concept of multiple power states is introduced to the operation of optical transceivers. This approach has been found in modern mobile CPUs and wireless communication systems like BlueTooth and wireless LAN (IEEE802.11). To our knowledge, it is the first time that multiple power states are used in Giga-bit communication links. Two power states (modes), namely "awake" and "doze", are defined for the transceiver. Second, the event-driven, dynamic power-on technique, optic wake-on-link, is proposed and characterized. For Giga-bit links, the primary challenge is to achieve fast initialization of the link upon power-on. Besides improvements of the initialization protocols at various levels, this requires varieties of time parameters to be minimized at the physical level. The dissertation identifies four critical time parameters that affect the transceiver circuit recovery time at power-on, and discusses the methods of improvement, among which source-synchronization and differential signaling have been used in the design of the work. The power-saving performance of optic wake-on-link is then formulated. Third, the physical design of the optical transceiver and the experiment system is described. This includes the circuitry, digital logic, optical system, PCB backplane system and integration methods. On the transceiver, circuit modules that support "awake" mode and "doze" mode are physically separated in general to facilitate different optimizing purposes. The transceiver chip is talking to the outside through serial-in/paralle/-out register chains. The digital logic, mostly designed in Xilinx FPGA, provides pipe-line-like, register pre-loading technique for programming the register chains. Finally, experiments are conducted and presented, which include the bench mark of various aspects of the transceiver performance followed by testing of optic wake-on-link. The experiment proves the feasibility of optic wake-on-link. (Abstract shortened by UMI.).