Bell Labs Technical Journal最新文献_第7页

Mode group division multiplexing in graded-index multimode fibers 渐变折射率多模光纤中的模式群分复用

Bell Labs Technical Journal Pub Date : 2013-12-01 DOI: 10.1002/bltj.21632

Bernd Franz;Henning Bülow

引用次数: 35

Recent Alcatel-Lucent patents Alcatel-Lucent最近的专利

Bell Labs Technical Journal Pub Date : 2013-12-01 DOI: 10.1002/bltj.21640

引用次数: 0

Optical ring metro networks with flexible Grid and distance-adaptive optical coherent transceivers 具有灵活网格和距离自适应光相干收发器的光环形城域网

Bell Labs Technical Journal Pub Date : 2013-12-01 DOI: 10.1002/bltj.21629

Cristina Rottondi;Massimo Tornatore;Giancarlo Gavioli

{"title":"Optical ring metro networks with flexible Grid and distance-adaptive optical coherent transceivers","authors":"Cristina Rottondi;Massimo Tornatore;Giancarlo Gavioli","doi":"10.1002/bltj.21629","DOIUrl":"https://doi.org/10.1002/bltj.21629","url":null,"abstract":"The utilization of distance-adaptive coherent optical transceivers in combination with a flexible finer-grained Wavelength Division Multiplexing (WDM) grid has been proposed in optical core networks to enable higher spectral efficiency and flexibility in the allocation of traffic flows. However, the application of distance-adaptive transceivers in metro networks, which are typically based on ring topologies and characterized by shorter distances and lower traffic volumes, is still an open research area both in terms of network resource savings and coherent technology requirements. This paper discusses and analyzes an optical metro ring network architecture with distance-adaptive coherent transceivers and formalizes the routing, modulation level, and spectrum assignment (RMLSA) optimization problem over such a network in order to evaluate the possible benefits introduced by the use of coherent technologies and of a spectrum grid of finer granularity in metro scenarios. Comparisons with legacy WDM systems show significant savings in terms of spectrum occupation and transceiver utilization.","PeriodicalId":55592,"journal":{"name":"Bell Labs Technical Journal","volume":"18 3","pages":"95-110"},"PeriodicalIF":0.0,"publicationDate":"2013-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1002/bltj.21629","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"50327350","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 37

Optical networking and technology innovation 光网络与技术创新

Bell Labs Technical Journal Pub Date : 2013-12-01 DOI: 10.1002/bltj.21624

Andreas Leven;Eve L. Varma

引用次数: 0

System design tool for high bit rate terrestrial transmission systems with coherent detection 具有相干检测的高比特率地面传输系统的系统设计工具

Bell Labs Technical Journal Pub Date : 2013-12-01 DOI: 10.1002/bltj.21637

Bruno Lavigne;Mathieu Lefrançois;Elodie Balmefrezol;Christine Bresson;Francesco Vacondio;Jean-Christophe Antona;Emmanuel Seve;Olivier Rival

{"title":"System design tool for high bit rate terrestrial transmission systems with coherent detection","authors":"Bruno Lavigne;Mathieu Lefrançois;Elodie Balmefrezol;Christine Bresson;Francesco Vacondio;Jean-Christophe Antona;Emmanuel Seve;Olivier Rival","doi":"10.1002/bltj.21637","DOIUrl":"https://doi.org/10.1002/bltj.21637","url":null,"abstract":"Coherent detection offers the ability to compensate for linear transmission impairments such as fiber chromatic dispersion and polarization-mode dispersion in the digital domain, thereby enabling dispersion-uncompensated optical transmission for high performance and high cost effectiveness. In dispersion-uncompensated transmission systems, the statistics of optical nonlinearity induced distortions have been proven to be essentially Gaussian-distributed, and new physical models have emerged showing profound differences with respect to legacy systems based on direct detection. From such differences stems the need to adapt the design tool to capture these new propagation properties. In that respect, we propose a model for performance prediction, which is used to derive a simple yet effective feasibility parameter to be embedded in the design tool. The feasibility parameter is experimentally validated with real time product transponders, and realistic system configurations: a precision of ±0.5 dB is achieved for 40 Gb/s, 100 Gb/s and 400 Gb/s coherent channels, which represents an improvement of more than 3 dB over the design tool using the nonlinear phase shift as the criterion.","PeriodicalId":55592,"journal":{"name":"Bell Labs Technical Journal","volume":"18 3","pages":"251-266"},"PeriodicalIF":0.0,"publicationDate":"2013-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1002/bltj.21637","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"50327352","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 21

Free-space optical backplane prototype for telecommunication equipment in the petabit/s range 用于千兆比特/秒范围内电信设备的自由空间光学背板原型

Bell Labs Technical Journal Pub Date : 2013-12-01 DOI: 10.1002/bltj.21639

Santo Maggio;Qingnan Zhang;Zhongxu Zhao

引用次数: 1

An analytical approach for estimating optimal multi-layer network cost, exploiting the flexible-grid optical technology 利用柔性网格光学技术估算多层网络最优成本的分析方法

Bell Labs Technical Journal Pub Date : 2013-12-01 DOI: 10.1002/bltj.21636

Andrea Paparella;Riccardo Gemelli

引用次数: 1

Low cost TWDM by wavelength-set division multiplexing 低成本波分复用TWDM

Bell Labs Technical Journal Pub Date : 2013-12-01 DOI: 10.1002/bltj.21633

Wolfgang Pöhlmann;Bernhard Deppisch;Thomas Pfeiffer;Carlo Ferrari;Mark Earnshaw;Alex Duque;Robert L. Farah;Joe Galaro;James Kotch;Man Fai Lau;Doutje T. van Veen;Peter Vetter

{"title":"Low cost TWDM by wavelength-set division multiplexing","authors":"Wolfgang Pöhlmann;Bernhard Deppisch;Thomas Pfeiffer;Carlo Ferrari;Mark Earnshaw;Alex Duque;Robert L. Farah;Joe Galaro;James Kotch;Man Fai Lau;Doutje T. van Veen;Peter Vetter","doi":"10.1002/bltj.21633","DOIUrl":"https://doi.org/10.1002/bltj.21633","url":null,"abstract":"After extensive comparison of candidate technologies, the Full Service Access Network (FSAN) Group in early 2012 made the decision to define Time/ Wavelength Division Multiplexing (TWDM) as the primary solution for the next-generation passive optical network (NG-PON2). A minimum of four wavelengths are foreseen as providing a total capacity per feeder line of 40 Gbit/s downstream and 10 Gbit/s or more upstream. Conventional wavelength division multiplexing (WDM) lasers from core or metro networks are too expensive for fiber to the home (FTTH) systems, because every optical network unit (ONU) will need a tunable laser for upstream transmission. In this paper we will compare different technical solutions and present wavelength-set division multiplexing (WSDM), a scheme developed by Bell Labs as the preferred solution for cost reasons. WSDM uses a laser that can be tuned by an on-chip heater stripe. To exploit this partial wavelength tunability, we do not use contiguous wavelength bands, but wavelength-sets consisting of cyclic interleaved wavelength slots on a fine grid. This wavelength plan can be implemented, e.g., by a cyclic arrayed waveguide grating (AWG) with a small free spectral range. We will describe the concept in detail and report on its experimental validation.","PeriodicalId":55592,"journal":{"name":"Bell Labs Technical Journal","volume":"18 3","pages":"173-193"},"PeriodicalIF":0.0,"publicationDate":"2013-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1002/bltj.21633","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"50416014","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 8

Elastic optical networks: The global evolution to software configurable optical networks 弹性光网络：软件可配置光网络的全球演进

Bell Labs Technical Journal Pub Date : 2013-12-01 DOI: 10.1002/bltj.21631

Patricia Layec;Annalisa Morea;Francesco Vacondio;Olivier Rival;Jean-Christophe Antona

{"title":"Elastic optical networks: The global evolution to software configurable optical networks","authors":"Patricia Layec;Annalisa Morea;Francesco Vacondio;Olivier Rival;Jean-Christophe Antona","doi":"10.1002/bltj.21631","DOIUrl":"https://doi.org/10.1002/bltj.21631","url":null,"abstract":"Worldwide operator deployment of high-speed 100G coherent optical networks is currently underway. To ensure a competitive solution offering significant performance improvements to cope with the ever-increasing traffic demand, a novel network concept has been proposed for improved resource utilization based on “elasticity”; specifically, the ability to make a number of previously fixed transmission parameters tunable, for example optical data rate or channel spacing. The benefits are numerous, including increased network capacity, lower cost per bit, and improved energy efficiency and scalability. In this paper, we review the work carried out within the Cooperation for a Sustained European Leadership in Telecommunications (CELTIC) Elastic-Optical NETwork (EO-Net) project towards advancing the state of software-configurable optical networking. We identify the key building blocks for enabling elastic optical networks to provide desired performance improvements over static optical networks. We examine the design of elastic transponders capable of data rate adaptation, interfaces between client packet devices and transponders supporting flexible traffic aggregation, and associated algorithms for traffic grooming and routing. We also perform network cost/energy analyses. Finally, we review the experimental demonstration of such elastic functionalities.","PeriodicalId":55592,"journal":{"name":"Bell Labs Technical Journal","volume":"18 3","pages":"133-151"},"PeriodicalIF":0.0,"publicationDate":"2013-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1002/bltj.21631","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"50328346","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 53

Semi-empirical description and projections of Internet traffic trends using a hyperbolic compound annual growth rate 使用双曲线复合年增长率对互联网流量趋势的半经验描述和预测

Bell Labs Technical Journal Pub Date : 2013-12-01 DOI: 10.1002/bltj.21625

Steven K. Korotky

{"title":"Semi-empirical description and projections of Internet traffic trends using a hyperbolic compound annual growth rate","authors":"Steven K. Korotky","doi":"10.1002/bltj.21625","DOIUrl":"https://doi.org/10.1002/bltj.21625","url":null,"abstract":"For the purpose of projecting future macroscopic Internet traffic, we have analyzed historical U.S. and global Internet traffic volumes previously reported for 1990 to the present. The empirical long-term traffic trends are characterized by growth rates that have generally been decreasing over time, and so are not adequately described as exponential growth. Based on regression analyses, we also conclude that the decreasing growth rates are not well represented by the saturation characteristic of the logistic function alone. However, we find the observed traffic data are well reproduced over ranges spanning more than six orders of magnitude of traffic volume and a period of 17 years by a hyperbolic dependence of the compound annual growth rate on time. Using a semi-empirical hyperbolic function to model the growth rate we have carried out linearized regression analyses of a combination of historical and near-term traffic forecasts to project macroscopic Internet traffic to 2020 for several geo-economic regions, market segments, and application categories. In contrast to the decade of 2000–2010 when global Internet traffic grew more than 100-fold, the projections indicate that over the decade 2010–2020 the global wireline Internet traffic will grow approximately 16 times larger to approach 250 exabytes per month and the global mobile Internet traffic will grow approximately 150 times larger to approach 40 exabytes per month. The projections also indicate that over the decade the compound annual growth rate of global wireline Internet traffic will decrease from approximately 45 percent to 25 percent per year and the growth rate of global mobility Internet traffic will decrease from approximately 170 percent to 30 percent per year. By considering both the historical trends and near-term forecasts, our analyses and projections call attention to those traffic categories for which estimates of future Internet traffic may carry lesser or greater uncertainty.","PeriodicalId":55592,"journal":{"name":"Bell Labs Technical Journal","volume":"18 3","pages":"5-21"},"PeriodicalIF":0.0,"publicationDate":"2013-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1002/bltj.21625","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"50327357","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 37