检索结果-内蒙古大学图书馆

metro and data center optical networks and short-reach links IV 2021

ISBN: (纸本)9781510642591

The proceedings contain 15 papers. The topics discussed include: multi-Tb/s photonic transceivers for metro optical network connectivity evolution;high temperature AlGaInAs-based 25G DML-DFB lasers operating in O-band for data center use;evaluation of low-complexity digital coherent receivers for short-reach transmission systems;photonic integrated nodes for next-generation metro optical networks;development of optical coupling technologies for Si-photonics-die embedded package substrate;global insights into the key technology enabling the exponential growth of digital communication networks;the path to 1Tb/s and beyond datacenter interconnect networks: technologies, components and subsystems;enabling service provisioning and quality maintenance in sliceable optical networks;and recent trends in coherent free-space optical communications.

关键词：

来源：评论

学校读者我要写书评

暂无评论

Enhancing data center Interconnects Efficiency with Integrated SOAs in InP Mach-Zehnder Modulators: an Experimental Validation 24

Enhancing Data Center Interconnects Efficiency with Integrat...

引用

24th International conference on Transparent optical networks (ICTON)

作者： D'Ingillol, Rocco Straullu, Stefano Siano, Rocco Belmonte, Michele Currie, Vittorio Politecn Torino Turin Italy LINKS Fdn Turin Italy Lumentum Milan Italy

This study investigates the impact of integrated SOAs within InP IQ-MZM PICs on short-reach optical links for DCI applications. Experimental validation, focusing on BER, Q-factor and EVM results, highlights SOAs' ... 详细信息

ISBN: (纸本)9798350377330;9798350377323

关键词： optical links

来源：评论

学校读者我要写书评

暂无评论

Symbol error rate minimization using deep learning approaches for short-reach optical communication networks

引用

FRONTIERS IN PHYSICS 2024年 12卷

作者： Iqbal, Muhammad Ghafoor, Salman Ahmad, Arsalan Aljohani, Abdulah Jeza Mirza, Jawad Aziz, Imran Poti, Luca Natl Univ Sci & Technol Sch Elect Engn & Comp Sci SEECS Islamabad Pakistan King Abdulaziz Univ Dept Elect & Comp Engn Jeddah Saudi Arabia HITEC Univ Elect Engn Dept Taxila Pakistan SEECS Photon Res Grp Islamabad Pakistan Uppsala Univ Dept Phys & Astron Uppsala Sweden Mirpur Univ Sci & Technol MUST Mirpur Pakistan Natl Interuniv Consortium Telecommun CNIT Milan Italy

short-reach optical communication networks have various applications in areas where high-speed connectivity is needed, for example, inter- and intra-data center links, optical access networks, and indoor and in-building communication systems. Machine learning (ML) approaches provide a key solution for numerous challenging situations due to their robust decision-making, problem-solving, and pattern-recognition abilities. In this work, our focus is on utilizing deep learning models to minimize symbol error rates in short-reach optical communication setups. Various channel impairments, such as nonlinearity, chromatic dispersion (CD), and attenuation, are accurately modeled. Initially, we address the challenge of modeling a nonlinear channel. Consequently, we harness a deep learning model called autoencoders (AEs) to facilitate communication over nonlinear channels. Furthermore, we investigate how the inclusion of a nonlinear channel within an autoencoder influences the received constellation as the optical fiber length increases. Another facet of our work involves the deployment of a deep neural network-based receiver utilizing a channel influenced by chromatic dispersion. By gradually extending the optical length, we explore its impact on the received constellation and, consequently, the symbol error rate. Finally, we incorporate the split-step Fourier method (SSFM) to emulate the combined effects of nonlinearities, chromatic dispersion, and attenuation in the optical channel. This is accomplished through a neural network-based receiver. The outcome of this work is an evaluation and reduction of the symbol error rate as the length of the optical fiber is varied.

关键词： short-reach optical links machine learning optical access networks symbol error rate autoencoders

来源：评论

学校读者我要写书评

暂无评论

Recurrent Neural networks and Recurrent optical Spectrum Slicers as Equalizers in High Symbol Rate optical Transmission Systems

引用

JOURNAL OF LIGHTWAVE TECHNOLOGY 2023年第15期41卷 5037-5050页

作者： Sozos, Kostas Deligiannidis, Stavros Sarantoglou, George Mesaritakis, Charis Bogris, Adonis Univ West Attica Dept Informat & Comp Engn Egaleo 12243 Greece Univ Aegean Dept Informat & Commun Syst Engn Samos 83200 Greece

The transition to the edge-cloud era makes ultra-high data rate signals indispensable for covering the immense and increasing traffic demands created. This ecosystem also seeks for power efficient optical modules that will deliver this enormous data load. optical communication systems and their continuous evolution have responded to the upward trend of capacity needs in all different network ecosystems, scaling from short-reach links serving data center, fiber-to-the-home and 5G/B5G services to metro and long-haul transoceanic cables. Kerr induced non-linearities at long haul and dispersion induced power fading at short reach remain intractable problems that vastly affect high symbol rate systems. So, they must be addressed in a power efficient way in order to cope with the ever-increasing traffic requirements. In this article, we review our recent work in machine learning and neuromorphic processing in the optical domain for the mitigation of transmission impairments at very high symbol rates. Post-detection techniques based on bidirectional recurrent neural networks for non-linearity compensation and neuromorphic recurrent optical spectrum slicers for power fading mitigation and self-coherent detection emerge as promising solutions for mid-term deployment in long-haul and short-reach communication systems respectively. The current work provides new results in both fields focusing on multi-channel detection in the coherent long-haul domain and on a cost/consumption/performance assessment of neuromorphic photonic processing based on recurrent spectrum slicing in comparison to the state-of-the-art. A thorough analysis of other state-of-the-art techniques in both domains is also provided revealing the merits and shortcomings of recurrent neural networks and neuromorphic photonic processing in high-speed optical communication systems.

关键词： Digital signal processing neural networks optical computing optical fiber communications optical receivers

来源：评论

学校读者我要写书评

暂无评论

Integrated SOAs enable energy-efficient intra-data center coherent links

引用

OPTICS EXPRESS 2023年第11期31卷 17480-17493页

作者： Maharry, Aaron Andrade, Hector Misak, Stephen Liu, Junqian Xia, Yujie Wissing, Aaron Movaghar, Ghazal Arrunategui-Norvick, Viviana Chansky, Evan D. Du, Xinhong Saleh, Adel A. M. Buckwalter, James F. Coldren, Larry Schow, Clint L. Univ Calif Santa Barbara Dept Elect & Comp Engn Santa Barbara CA 93106 USA

Coherent optical links are becoming increasingly attractive for intra-data center applications as data rates scale. Realizing the era of high-volume short-reach coherent links will require substantial improvements in transceiver cost and power efficiency, necessitating a reassessment of conventional architectures best-suited for longer-reach links and a review of assumptions for shorter-reach implementations. In this work, we analyze the impact of integrated semiconductor optical amplifiers (SOAs) on link performance and power consumption, and describe the optimal design spaces for low-cost and energy-efficient coherent links. Placing SOAs after the modulator provide the most energy-efficient link budget improvement, up to 6 pJ/bit for large link budgets, despite any penalties from nonlinear impairments. Increased robustness to SOA nonlinearities makes QPSK-based coherent links especially attractive, and larger supported link budgets enable the inclusion of optical switches, which could revolutionize data center networks and improve overall energy efficiency.& COPY;2023 Optica Publishing Group under the terms of the Optica Open Access Publishing Agreement

关键词： Analog to digital converters Coherent receivers Fiber optic amplifiers Nonlinear impairments optical amplification Spontaneous emission

来源：评论

学校读者我要写书评

暂无评论

metro and data center optical networks and short-reach links III

Metro and Data Center Optical Networks and Short-Reach Links...

引用

metro and data center optical networks and short-reach links III 2020

ISBN: (纸本)9781510633797

The proceedings contain 23 papers. The topics discussed include: simplified optical transceivers for stokes-vector transmission systems;56 Gbaud PAM4 real time optical datacom link;enabling low-cost, high-volume production compatible terabit transceivers with up to 1.6 Tbps capacity and 100 Gbps per lane PAM4 modulation for intra-data center optical interconnects up to 2 km: the TERIPHIC project approach;programmable transmission systems using coherent detection enabling multi-Tb/s Interfaces for IT-communications convergence in optical networks;high-speed optical wireless links for datacenters;system aspects of the next-generation data-center networks based on 200G per lambda IMDD links;and high-speed optical devices and packaging techniques for data centers.

关键词：

来源：评论

学校读者我要写书评

暂无评论

On the Application of Semiconductor optical Amplifier towards Terabit/s short-reach IM/DD Transmission Systems 13

On the Application of Semiconductor Optical Amplifier toward...

引用

conference on Next-Generation optical Communication - Components, Sub-Systems, and Systems XIII

作者： Venkatasubramani, Lakshmi Narayanan Reza, Ahmed Galib Barry, Liam Dublin City Univ Sch Elect Engn Dublin 09 Ireland

ISBN: (纸本)9781510670495;9781510670488

The requirement for increased data transmission rates in data centres (DC) and short-reach systems like passive optical networks (PON) continues relentlessly. Intensity modulation-direct detection (IM/DD) systems are preferred owing to their simple implementation compared to coherent optical systems. Due to increased DC clusters and network centralization, employing semiconductor optical amplifiers (SOA) in short-reach links is prudent owing to their ability for photonic integration, simultaneous multichannel amplification, and offering a small footprint. In this paper, we present the potential application of the SOA in future Terabit/s DC and optical access networks with SOA placed at distinct locations in an optical link and as a device enabling transmission of higher cardinality modulation.

关键词： Semiconductor optical amplifier passive optical networks optical frequency comb data centre interconnects relative intensity noise optical fiber transmission

来源：评论

学校读者我要写书评

暂无评论

New Prospects of optical Wireless Communication Systems Exploiting VCSEL-Based Transmitters

引用

JOURNAL OF LIGHTWAVE TECHNOLOGY 2025年第4期43卷 1615-1624页

作者： Gilli, L. Cossu, G. Ciaramella, E. Scuola Super Sant Anna I-56124 Pisa Italy

In the last decades, Vertical Cavity Surface Emitting Lasers (VCSELs) emerged as a dominant technology for shortreach high-data rate networks thanks to several advantageous features. These include low power consumption, high modulation speeds, low costs, and compact size. More recently, these inherent characteristics of the VCSELs have also made them exceptionally suited for a variety of optical Wireless Communication (OWC) applications, particularly for short-distance links, up to a few meters. This paper reviews a range of new and promising applications for VCSELs within emerging OWC domains: data centers (DCs), space, and harsh environment. We present and discuss different VCSEL-based OWC systems that were designed, implemented, and tested in these emerging scenarios. For the DCs scenario, we present a novel approach to establish OWC links able to reach data rates up to 40 Gbit/s with a single VCSEL. In the space environment, innovative OWC systems can support data communication among electronic elements placed in line-of-sight outside the spacecraft or inside a small satellite. VCSELs can be also exploited for data transmission in the very harsh environment of high-energy physics experiments. Here, a 10 Gbit/s OWC system was designed for the Board-to-Board (B2B) link in High Energy Physics (HEP) experiments. Since space and HEP applications exhibit extreme conditions, the OWC systems and, particularly, the VCSELs were tested to assess their behavior under strong mechanical, thermal, and radiation stress.

关键词： Vertical cavity surface emitting lasers optical receivers optical fibers optical fiber communication optical transmitters Wireless communication Stimulated emission optical fiber cables Bandwidth Radio frequency data-center network free-space optics vertical cavity surface emitting wireless communication

来源：评论

学校读者我要写书评

暂无评论

Energy-Efficient Intra-data center Coherent links with High Link Budget

Energy-Efficient Intra-Data Center Coherent Links with High ...

引用

作者： Maharry, Aaron University of California Santa Barbara

学位级别：Ph.D., Doctor of Philosophy

As demand for internet applications, cloud computation, and AI continue to grow, data center networks must scale to support increased traffic flow. While current intensity modulation links are an economical solution today, coherent links are an increasingly attractive option to improve performance. Conventional coherent link technologies that are used today in >40km transmission are based on power-hungry and expensive digital signal processing, and cannot be easily scaled to the high volumes required for data centers. Coherent links must be optimized for low power consumption and cost for reaches <2 km to make them viable for intra-data center networks. The enlarged link loss budgets from such links will also enable optical switching networks, which can dynamically reconfigure the network for improved server utilization, leading to vast improvements in overall data center energy efficiency. The focus of this work is to develop energy-efficient coherent links with large link budgets for intra-data center networks. Design methodologies and architectural trade-offs for short-reach coherent link optimization will be presented. Using these techniques, custom electronic and photonic integrated circuits for coherent transmitters and receivers were designed, fabricated, assembled, and characterized. The first-ever full coherent link operating in the O-band was demonstrated with 56 Gbaud QPSK transmission. An O-band coherent link with custom packaged integrated circuits for both the transmitter and receiver was also demonstrated with 224 Gbps DP-QPSK transmission below the HD-FEC threshold with <10 pJ/bit power consumption expected for circuits including integrated optical gain. These results shows that optimized O-band coherent links can support high data rates and link budgets with attractive energy efficiency for future intra-data center networks.

关键词： Coherent optical links data centers Energy-efficiency O-band optical links Silicon photonics

来源：评论

学校读者我要写书评

暂无评论

Ring-Cascaded Sequential Micro-Ring Resonators Array as a Photonic Reservoir for Signal Equalization in Intra-data center networks 24

Ring-Cascaded Sequential Micro-Ring Resonators Array as a Ph...

引用

24th International conference on Transparent optical networks (ICTON)

作者： Laleh, Mohammad Seifi Kuehl, Sebastian Oettinghaus, Silas Dochhan, Annika Pachnicke, Stephan Univ Kiel Chair Commun Kaiserstr 2 D-24134 Kiel Germany

ISBN: (纸本)9798350377330;9798350377323

A novel photonic reservoir using multi-ring resonators is described to perform signal equalization in a short-reach PAM-4 transmission system running at 112 GBaud. The proposed structure enables resonator-based optical feedback, which improves BER compared to DSP-based feed-forward equalization, while requiring only a single photodiode with no additional bandwidth, thereby reducing DSP complexity.

关键词： Reservoir computing signal equalization ring resonator digital signal processing

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：