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 Digital Signal Processing In High Speed Optical Fiber Communication Principle and Application written by Jianjun Yu and published by Springer Nature. This book was released on 2020-07-06 with total page 572 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book presents the principles and applications of optical fiber communication based on digital signal processing (DSP) for both single and multi-carrier modulation signals. In the context of single carrier modulation, it describes DSP for linear and nonlinear optical fiber communication systems, discussing all-optical Nyquist modulation signal generation and processing, and how to use probabilistic and geometrical shaping to improve the transmission performance. For multi-carrier modulation, it examines DSP-based OFDM signal generation and detection and presents 4D and high-order modulation formats. Lastly, it demonstrates how to use artificial intelligence in optical fiber communication. As such it is a useful resource for students, researches and engineers in the field of optical fiber communication.
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 Fiber Telecommunications VIB written by Polina Bayvel and published by Elsevier Inc. Chapters. This book was released on 2013-05-11 with total page 71 pages. Available in PDF, EPUB and Kindle. Book excerpt: The key question of current optical communications research is: how to maximize both capacity and transmission distance in future optical transmission networks by using spectrally-efficient modulation formats with coherent detection, and how can digital signal processing aid in this quest? There is a clear trade-off between spectral efficiency and transmission distance, since the more spectrally-efficient modulation formats are also more susceptible to optical fiber nonlinearities. This chapter illustrates the application of nonlinear backpropagation to mitigate for both linear and nonlinear transmission impairments for a range of modulation formats, at varying symbol-rates and wavelength spacings, and also by varying the signal bandwidth which is backpropagated. The basics of coherent receiver structure and DSP algorithms for chromatic dispersion compensation, equalization and phase recovery of PDM-BPSK, PS-QPSK, PDM-QPSK, PDM-8PSK, PDM-8QAM, and PDM-16QAM are reviewed and the effectiveness of the nonlinearity compensating DSP based on digital backpropagation is explored. This chapter includes a comprehensive literature review of the key experimental demonstrations of nonlinearity-compensating DSP.
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 Spectrally and Power Efficient Optical Communication Systems written by Jose Krause Perin and published by . This book was released on 2018 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Increased traffic demands globally and in particular in short-reach links in data centers will require optical communication systems to continue scaling at an accelerated pace. Nevertheless, energy constraints start to limit the bit rate that can be practically transmitted over optical systems both at the shortest distances in data centers and at the longest distances in ultra-long submarine links. Short-reach links in data centers face strict constraints on power consumption, size, and cost, which will demand low-power solutions that scale to bit rates beyond 100 Gbit/s per wavelength, while accommodating increased losses due to longer fiber plant, multiplexing of more wavelengths, and possibly optical switching. At the longest distances, submarine optical cables longer than about 5,000 km face energy constraints due to power feed limits at the shores, which restricts the electrical power available to the undersea optical amplifiers, ultimately limiting the optical power and throughput per fiber. This dissertation presents strategies to mitigate these limitations. For short-reach links in data centers, we propose low-power coherent receiver architectures that completely avoid high-speed analog-to-digital converters and digital signal processors. For long-haul submarine links, we demonstrate how optimizing the channel power allocation under a constraint on the amplifier power maximizes the information-theoretic capacity per fiber.
Download or read book CMOS Multichannel Single Chip Receivers for Multi Gigabit Optical Data Communications written by Paul Muller and published by Springer Science & Business Media. This book was released on 2007-10-29 with total page 207 pages. Available in PDF, EPUB and Kindle. Book excerpt: In the world of optical data communications this book will be an absolute must-read. It focuses on optical communications for short and very short distance applications and discusses the monolithic integration of optical receivers with processing elements in standard CMOS technologies. What’s more, it provides the reader with the necessary background knowledge to fully understand the trade-offs in short-distance communication receiver design and presents the key issues to be addressed in the development of such receivers in CMOS technologies. Moreover, novel design approaches are presented.
Download or read book Digital Optical Communications written by Le Nguyen Binh and published by CRC Press. This book was released on 2008-11-20 with total page 610 pages. Available in PDF, EPUB and Kindle. Book excerpt: The need for advanced transmission techniques over long haul optically amplified communications has prompted a convergence of digital and optical communications. Digital Optical Communications explores the practical applications of this union and applies digital modulation techniques to optical communications systems.After reviewing the fundamental
Download or read book Chapter Digital Signal Processing for Optical Communications and Networks written by Tianhua Xu and published by . This book was released on 2017 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The achievable information rates of optical communication networks have been widely increased over the past four decades with the introduction and development of optical amplifiers, coherent detection, advanced modulation formats, and digital signal processing techniques. These developments promoted the revolution of optical communication systems and the growth of Internet, towards the direction of high-capacity and long-distance transmissions. The performance of long-haul high-capacity optical fiber communication systems is significantly degraded by transmission impairments, such as chromatic dispersion, polarization mode dispersion, laser phase noise and Kerr fiber nonlinearities. With the entire capture of the amplitude and phase of the signals using coherent optical detection, the powerful compensation and effective mitigation of the transmission impairments can be implemented using the digital signal processing in electrical domain. This becomes one of the most promising techniques for next-generation optical communication networks to achieve a performance close to the Shannon capacity limit. This chapter will focus on the introduction and investigation of digital signal processing employed for channel impairments compensation based on the coherent detection of optical signals, to provide a roadmap for the design and implementation of real-time optical fiber communication systems.
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 Introduction to Fiber Optic Communications written by Rongqing Hui and published by Academic Press. This book was released on 2019-09-15 with total page 660 pages. Available in PDF, EPUB and Kindle. Book excerpt: Introduction to Fiber-Optic Communications provides students with the most up-to-date, comprehensive coverage of modern optical fiber communications and applications, striking a fine balance between theory and practice that avoids excessive mathematics and derivations. Unlike other textbooks currently available, this book covers all of the important recent technologies and developments in the field, including electro-optic modulators, coherent optical systems, and silicon integrated photonic circuits. Filled with practical, relevant worked examples and exercise problems, the book presents complete coverage of the topics that optical and communications engineering students need to be successful. From principles of optical and optoelectronic components, to optical transmission system design, and from conventional optical fiber links, to more useful optical communication systems with advanced modulation formats and high-speed DSP, this book covers the necessities on the topic, even including today's important application areas of passive optical networks, datacenters and optical interconnections. Covers fiber-optic communication system fundamentals, design rules and terminologies Provides students with an understanding of the physical principles and characteristics of passive and active fiber-optic components Teaches students how to perform fiber-optic system design, performance evaluation and troubleshooting Includes modern advances in modulation and decoding strategies
Download or read book Digital Processing written by Le Nguyen Binh and published by CRC Press. This book was released on 2017-07-12 with total page 510 pages. Available in PDF, EPUB and Kindle. Book excerpt: With coherent mixing in the optical domain and processing in the digital domain, advanced receiving techniques employing ultra-high speed sampling rates have progressed tremendously over the last few years. These advances have brought coherent reception systems for lightwave-carried information to the next stage, resulting in ultra-high capacity global internetworking. Digital Processing: Optical Transmission and Coherent Receiving Techniques describes modern coherent receiving techniques for optical transmission and aspects of modern digital optical communications in the most basic lines. The book includes simplified descriptions of modulation techniques for such digital transmission systems carried by light waves. It discusses the basic aspects of modern digital optical communications in the most basic lines. In addition, the book covers digital processing techniques and basic algorithms to compensate for impairments and carrier recovery, as well as noise models, analysis, and transmission system performance.
Download or read book Optical Communication Systems for Short haul Applications written by L. E. Wood and published by . This book was released on 1973 with total page 92 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Millimeter Wave Radio over Fiber Links based on Mode Locked Laser Diodes written by Brendel, Friederike and published by KIT Scientific Publishing. This book was released on 2014-05-14 with total page 324 pages. Available in PDF, EPUB and Kindle. Book excerpt: Radio communications in the range of 60 GHz enable multi-Gigabit/s network access in indoor environments. Due to the propagation characteristics of such signals only very short range radio transmission is feasible. In order to distribute these signals across large distances, analog transmission over optical fiber is considered. In this work, mode-locked laser diodes serve as optoelectronic oscillators for the generation of such signals. Their system-relevant properties are studied in detail.
Download or read book New Design Paradigms for Long haul Optical Fiber Communication Systems written by Hrishikesh Srinivas and published by . This book was released on 2022 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Long-haul optical fiber communication systems form the backbone of worldwide connectivity. In particular, submarine fiber systems today carry 99% of all data traffic between the continents, with continuing rapid growth. Increases in system reach and capacity have been enabled by new technologies as well as design approaches, among the chief examples the erbium-doped fiber amplifier (EDFA), allowing wideband optical amplification of wavelength-division-multiplexed signals, and coherent detection. Each cable uses hundreds of in-line EDFAs offering several THz of bandwidth and near-quantum-limited noise performance. The capacity of these systems is now limited by the electrical power that can be delivered to the amplifiers. Addressing this power limitation requires a new design paradigm, space-division multiplexing (SDM), which uses many parallel spatial channels, each carrying less data and less optical power, a regime in which the amplifiers are typically less efficient. Interestingly, the utility of these power-limited photonic systems is increased by operating the photonic devices less efficiently. Future growth will also rely on the ability of new paradigms employing integrated SDM approaches to scale up the number of spatial paths for lightwave communication beyond standard single-mode fibers. State-of-the-art power-limited long-haul systems have already begun to use the concept of SDM implemented as parallel single-mode fibers. On the other hand, as yet unrealized potential lies in a closer integration of communication paths or spatial channels, encompassing multicore and multimode fiber approaches, to increase the spatial information density and enable compact scaling of components. This integration is most promising in designing the amplifiers which compensate span losses periodically along a long-haul link, as higher power and cost efficiency could result from sharing power between spatial channels in multicore or multimode EDFAs. Furthermore, the strong coupling regime of multicore or multimode SDM transmission could ameliorate typical optical channel impairments due to fiber Kerr nonlinearity and mode-dependent loss or gain. In this thesis, we study the parallel single-mode SDM system paradigm before investigating strongly-coupled multimode SDM. We begin by presenting extensive measurements and modeling of power efficiency in a single-mode long-haul optical fiber transmission testbed whose design was optimized considering detailed amplifier physics. Our results demonstrate the potential for optimized power-limited SDM submarine systems to achieve Pb/s cable capacities. Next, motivated by the potential of wideband multimode and coupled-core multicore optical amplifiers, we present a unified, comprehensive treatment of the effect of polarization-dependent gain and mode-dependent gain on the capacity of strongly coupled ultra-long-haul SDM transmission systems, using simulations of a multisection model. We quantify the requirements for optical amplifiers given tolerable capacity losses, considering linear equalizers implemented in typical multiple-input multiple-output receivers. We then propose an amplifier subsystem design based on optimized multimode fiber amplifiers meeting long-haul system requirements, enabled by wavelength- and mode-selective pump couplers, towards efficient, integrated amplification for long-haul SDM systems. We also discuss challenges for multimode transmission. Finally, we shift to studying the optimization of signal design for inter-data center links that may use Kramers-Kronig receivers, which have been proposed as an intermediary between the standard direct detection and standard coherent detection paradigms of short- and long-haul optical links, respectively. By the end, we cover the full range of link lengths in long-haul optical communications, from ultra-long-haul submarine cables over ~10000 km down to campus-size links of up to ~100 km.
Download or read book Optical Communications and Networking Prospects in Industrial Applications written by Yang Yue and published by . This book was released on 2020 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 Advanced Digital Optical Communications written by Le Nguyen Binh and published by CRC Press. This book was released on 2017-11-22 with total page 1341 pages. Available in PDF, EPUB and Kindle. Book excerpt: This second edition of Digital Optical Communications provides a comprehensive treatment of the modern aspects of coherent homodyne and self-coherent reception techniques using algorithms incorporated in digital signal processing (DSP) systems and DSP-based transmitters to overcome several linear and nonlinear transmission impairments and frequency mismatching between the local oscillator and the carrier, as well as clock recovery and cycle slips. These modern transmission systems have emerged as the core technology for Tera-bits per second (bps) and Peta-bps optical Internet for the near future. Featuring extensive updates to all existing chapters, Advanced Digital Optical Communications, Second Edition: Contains new chapters on optical fiber structures and propagation, optical coherent receivers, DSP equalizer algorithms, and high-order spectral DSP receivers Examines theoretical foundations, practical case studies, and MATLAB® and Simulink® models for simulation transmissions Includes new end-of-chapter practice problems and useful appendices to supplement technical information Downloadable content available with qualifying course adoption Advanced Digital Optical Communications, Second Edition supplies a fundamental understanding of digital communication applications in optical communication technologies, emphasizing operation principles versus heavy mathematical analysis. It is an ideal text for aspiring engineers and a valuable professional reference for those involved in optics, telecommunications, electronics, photonics, and digital signal processing.
