Application of Tunable Lasers in Spectrally Efficient High Speed Optical Packet Switched Networks PDF Download
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Author: Arvind Kumar Mishra
Publisher:
ISBN:
Category : Lasers
Languages : en
Pages : 204
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Book Description
The rapid expansion and ever-growing demand of bandwidth consuming internet applications will require optical packet switching technology to efficiently support scalable bursty traffic and offer improved link utilization, functionality and flexibility over existing optical circuit-switching networks. The advanced modulation formats can be used to overcome problems associated with limited channel capacity by transmitting several times more information bits per symbol. And, the routing functionality of packets can be simplified by introduction of low rate label-controlled packet routing by eliminating the need for digital circuits operating at the payload data rate. In packet switching systems, the fast wavelength switching sampled grating distributed Bragg reflector (SGDBR) tunable lasers are the key components. However, the switching characteristics of these lasers are critical and may limit the minimum guard time needed between adjacent packets. This thesis is focused on suitability of SGDBR tunable lasers in optical packet switched networks employing spectrally efficient modulation formats (AMPSK and DQPSK) at data rate of 40Gbit/s. Several novel time-resolved measurement techniques were developed to investigate the wavelength drift; linewidth; bit-error, and Q-factor dynamics throughout packet length. The time-resolved Q-factor results demonstrated that the influence of linewidth dynamics degrade the system performance for AMPSK packets, while DQPSK packet performance was limited by rate of frequency drift as the SGDBR laser was switched between channels. It was found that DQPSK packets would require a longer blanking/guard time to obtain penalty free performance resulting lower link utilization than for AMPSK packets. Also, a novel multi-channel label controlled packet switching transmitter was demonstrated employing a spectrally compact subcarrier multiplexed labeling with 40Gbit/s payload with 2.5Gbit/s label to route packets in a 100GHz spaced WDM system. The time-resolved bit error performance of the label showed the detrimental influence of wavelength drift as the laser was switching from distant channel to adjacent channel.
Author: Arvind Kumar Mishra
Publisher:
ISBN:
Category : Lasers
Languages : en
Pages : 204
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Book Description
The rapid expansion and ever-growing demand of bandwidth consuming internet applications will require optical packet switching technology to efficiently support scalable bursty traffic and offer improved link utilization, functionality and flexibility over existing optical circuit-switching networks. The advanced modulation formats can be used to overcome problems associated with limited channel capacity by transmitting several times more information bits per symbol. And, the routing functionality of packets can be simplified by introduction of low rate label-controlled packet routing by eliminating the need for digital circuits operating at the payload data rate. In packet switching systems, the fast wavelength switching sampled grating distributed Bragg reflector (SGDBR) tunable lasers are the key components. However, the switching characteristics of these lasers are critical and may limit the minimum guard time needed between adjacent packets. This thesis is focused on suitability of SGDBR tunable lasers in optical packet switched networks employing spectrally efficient modulation formats (AMPSK and DQPSK) at data rate of 40Gbit/s. Several novel time-resolved measurement techniques were developed to investigate the wavelength drift; linewidth; bit-error, and Q-factor dynamics throughout packet length. The time-resolved Q-factor results demonstrated that the influence of linewidth dynamics degrade the system performance for AMPSK packets, while DQPSK packet performance was limited by rate of frequency drift as the SGDBR laser was switched between channels. It was found that DQPSK packets would require a longer blanking/guard time to obtain penalty free performance resulting lower link utilization than for AMPSK packets. Also, a novel multi-channel label controlled packet switching transmitter was demonstrated employing a spectrally compact subcarrier multiplexed labeling with 40Gbit/s payload with 2.5Gbit/s label to route packets in a 100GHz spaced WDM system. The time-resolved bit error performance of the label showed the detrimental influence of wavelength drift as the laser was switching from distant channel to adjacent channel.
Author: Biswanath Mukherjee
Publisher: Springer Nature
ISBN: 3030162508
Category : Technology & Engineering
Languages : en
Pages : 1169
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Book Description
This handbook is an authoritative, comprehensive reference on optical networks, the backbone of today’s communication and information society. The book reviews the many underlying technologies that enable the global optical communications infrastructure, but also explains current research trends targeted towards continued capacity scaling and enhanced networking flexibility in support of an unabated traffic growth fueled by ever-emerging new applications. The book is divided into four parts: Optical Subsystems for Transmission and Switching, Core Networks, Datacenter and Super-Computer Networking, and Optical Access and Wireless Networks. Each chapter is written by world-renown experts that represent academia, industry, and international government and regulatory agencies. Every chapter provides a complete picture of its field, from entry-level information to a snapshot of the respective state-of-the-art technologies to emerging research trends, providing something useful for the novice who wants to get familiar with the field to the expert who wants to get a concise view of future trends.
Author: Kyriakos E. Zoiros
Publisher: MDPI
ISBN: 3038971707
Category : Technology & Engineering
Languages : en
Pages : 157
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Book Description
This book is a printed edition of the Special Issue "Applications of Semiconductor Optical Amplifiers" that was published in Applied Sciences
Author: Yousra Ben Msallem
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Author:
Publisher: Information Gatekeepers Inc
ISBN:
Category :
Languages : en
Pages : 245
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Book Description
Author: Devi Chadha
Publisher: John Wiley & Sons
ISBN: 111939337X
Category : Science
Languages : en
Pages : 392
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Book Description
Provides a comprehensive and updated account of WDM optical network systems Optical networking has advanced considerably since 2010. A host of new technologies and applications has brought a significant change in optical networks, migrating it towards an all-optical network. This book places great emphasis on the network concepts, technology, and methodologies that will stand the test of time and also help in understanding and developing advanced optical network systems. The first part of Optical WDM Networks: From Static to Elastic Networks provides a qualitative foundation for what follows—presenting an overview of optical networking, the different network architectures, basic concepts, and a high-level view of the different network structures considered in subsequent chapters. It offers a survey of enabling technologies and the hardware devices in the physical layer, followed by a more detailed picture of the network in the remaining chapters. The next sections give an in-depth study of the three basic network structures: the static broadcast networks, wavelength routed networks, and the electronic/optical logically routed networks, covering the characteristics of the optical networks in the access, metropolitan area, and long-haul reach. It discusses the networking picture; network control and management, impairment management and survivability. The last section of the book covers the upcoming technologies of flex-grid and software defined optical networking. Provides concise, updated, and comprehensive coverage of WDM optical networks Features numerous examples and exercise problems for the student to practice Covers, in detail, important topics, such as, access, local area, metropolitan, wide area all-optical and elastic networks Includes protocols, design, and analysis along with the control and management of the networks Offers exclusive chapters on advance topics to cover the present and future technological trends, such as, software defined optical networking and the flexible grid optical networks Optical WDM Networks: From Static to Elastic Networks is an excellent book for under and post graduate students in electrical/communication engineering. It will also be very useful to practicing professionals in communications, networking, and optical systems.
Author: Arshad Chowdhury
Publisher:
ISBN:
Category :
Languages : en
Pages : 148
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Book Description
The evolution of the Internet has proved that packet switching, regardless of the underlying transport technology, is the most flexible and robust solution for the present and future dynamic network traffic. Service providers are now evolving their complex networks toward a simpler architecture, based on a single, highly available intelligent packet layer residing on optical transport layer. At the center of this new architecture is the Internet Protocol/Multi-Protocol Label Switching (IP/MPLS) routing platform directly over wavelength division multiplexing (WDM) layer. In these regard, optical packet switching (OPS) appears to be the most prominent candidate transport solution that can seamlessly integrate electrical and optical layers by transferring certain switching functionality from electronics to optics, thus alleviating unnecessarily slow and expensive optical-electrical-optical conversions and signal processing at the switching node.
Author: Milorad Cvijetic
Publisher: Artech House
ISBN: 1608075559
Category : Technology & Engineering
Languages : en
Pages : 824
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Book Description
This resource provides the latest details on 5th generation photonic systems that can be readily applied to projects in the field. Moreover, the book provides valuable, time-saving tools for network simulation and modeling. It includes coverage of optical signal transmission systems and networks; a wide range of critical methods and techniques, such as MIMO (multiple-input and multiple-output) by employing spatial modes in few-mode and multicore optical fiber; OFDM (orthogonal frequency-division multiplexing) utilized to enhance the spectral efficiency and to enable elastic optical networking schemes; and advanced modulation and coding schemes to approach the Shannon's channel capacity limit. There are detailed discussions on the basic principles and applications of high-speed digital signal processing, as well as description of the most relevant post-detection compensation techniques
Author: Yi Lin
Publisher:
ISBN:
Category :
Languages : en
Pages : 0
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Book Description
In future optical networks that employ wavelength division multiplexing (WDM), the use of optical switching technologies on a burst or packet level, combined with advanced modulation formats would achieve greater spectral efficiency and utilize the existing bandwidth more efficiently. All-optical wavelength converters are expected to be one of the key components in these broadband networks. They can be used at the network nodes to avoid contention and to dynamically allocate wavelengths to ensure optimum use of fiber bandwidth. In this work, a reconfigurable wavelength converter comprising of a Semiconductor Optical Amplifier (SOA) as the nonlinear element and a fast-switching sampled grating distributed Bragg reflector (SG-DBR) tunable laser as one of the pumps is developed. The wavelength conversion of 12.5-Gbaud quadrature phase shift keying (QPSK) and Pol-Mul QPSK signals with switching time of tens of nanoseconds is experimentally achieved. Although the tunable DBR lasers can achieve ns tuning time, they present relatively large phase noise. The phase noise transfer from the pump to the converted signal can have a deleterious effect on signal quality and cause a performance penalty with phase modulated signals. To overcome the phase noise transfer issue, a wavelength converter using tunable dual-correlated pumps provided by the combination of a single-section quantum dash passively mode-locked laser (QD-PMLL) and a programmable tunable optical filter is designed and the wavelength conversion of QPSK and 16-quadrature amplitude modulation (16-QAM) signals at 12.5 GBaud is experimentally investigated. Nonlinear distortion of the wavelength converted signal caused by gain saturation effects in the SOA can significantly degrade the signal quality and cause difficulties for the practical wavelength conversion of sig nal data with advanced modulation formats. In this work, the machine learning clustering based nonlinearity compensation method is proposed to improve the tolerance to nonlinear distortion in an SOA based wavelength conversion system with 16 QAM and 64 QAM signals.
Author: Antonia Dantcha
Publisher:
ISBN:
Category :
Languages : en
Pages : 112
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Book Description
