ATM Optical Switching Technology

1IntroductionHigh-speedopticalnetworkcanbedesignedtousetransparentopticalswitchingofdata.PhotonicstechnologyisexpectedtoplayamajorroleinthedevelopmentoffuturebroadbandopticalinformationnetWorks.PacketswitchingandtheswitchingofAsynchronousTransferMode(ATM)cellbasedonphotonicshavesomeobviousadvantagesovertheirelectroniccounterparts,e.g.transparency,flexibility,cost-effective,broadband,high-speed,verylargecapacity,etc.InATMOS(ATMOpticalSwitching)system,switching'canbeaccomplishedinopticald…     

Soliton Interaction in Optical Soliton Switching

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Adaptability Analysis of Fluctuating Traffic for IP Switching and Optical Switching

The technological development of smart devices and Internet of Things(IoT)has brought ever-larger bandwidth and fluctuating traffic to existing networks.The analy?sis of network capital expenditure(CAPEX)is extremely important and plays a fundamen?tal role in further network optimizing.In this paper,an adaptability analysis is raised for IP switching and optical transport network(OTN)switching in CAPEX when the service bandwidth is fluctuating violently.This paper establishes a multi-layer network architec?ture through Clos network model and discusses impacts of maximum allowable blocking rate and service bandwidth standard deviation on CAPEX of IP network and OTN network to find CAPEX demarcation point in different situations.As simulation results show,when the bandwidth deviation mean rate is 0.3 and the maximum allowable blocking rate is 0.01,the hardware cost of OTN switching will exceed IP switching as the average band?width is greater than 6100 Mbit/s.When the service bandwidth fluctuation is severe,the hardware cost of OTN switching will increase and exceed IP switching as the single port rate is allowed in optical switching.The increasing of maximum allowable blocking rate can decrease hardware cost of OTN switching.Finally,it is found that Flex Ethernet(FlexE)can be used to decrease CAPEX of OTN switching greatly at this time.     

Burst Assembly Schemes and Performance Evaluation in Optical Burst Switching Networks

1　Introduction　TheopticalInternethasbeenemergedasanefficientsolutionforsupportingever increasingInternettrafficbytakingadvantageofpotentiallyhugebandwidthofWavelength DivisionMultiplex (WDM )opticalnet works.Tomeettheincreasingbandwidthdemandsandreducecosts ,severalopticalnetwork paradigmshavebeenunderintensiveresearch .Ofalltheseparadigms,OpticalCircuitSwitching (OCS[1～ 3] )isrelativelyeasytoimplementbutlacksflexibilitytocopewiththefluc tuatingtrafficandthechanginglinkstate ,andrequi…     

IP Switching技术

今天、网络管理员面临的最大挑战是提高网络吞吐量(throughput)。Switch通过在硬件上执行被选择的关键作业,因此比传统的路由器价格更低,性能更高。Switch一般受限于它们所能支持的网络拓扑,通过将网络层的路由技术加到某些交换体系结构中。在基于IP应用(特别是Internet/Intranet)的企业主干网环境中,如何提高网络的吞吐量而又保证价格最优已成为人们最关注的问题。IP Switching提供了这种高性能、低价格的解决方案以建立优良的IP网络。     

无线中的Excel Switching

Excel交换机公司的开放式可编程交换平台(EXS)已在全球无线网络中得到应用。由于它特有的灵活性及伸缩性，Excel的产品系列现已在60个国家通讯网络中得以使用，包括北美、南美，亚洲、非洲及欧洲。所应用的范围包括卫星、无线环路、移动及有线和无线基础网络，ExcelEXS系列产品的开放性可以使开发商选择使用任何空中接口。     

Improvement on Switching Characteristics and Switching Losses of IGBT by ZVS-PWM

Absrtact: The principle of ZVS - PWM inverting circuit is first described by means of inverting welder supply. The contrastive study is made on switching characte -ristics and switching losses of IGBT between ZVS - PWM and hard - switching.     

Switching hub网络技术

Ｓｗｉｔｃｈｉｎｇｈｕｂ网络技术王勇一、早期的总线型结构网络早期的网络大多数采用总线型结构，使用同轴电缆作为网络传输媒体，随着网络规模的扩大，处理量的增加，虽然通过采用高速网卡增加网段和减少每个网段的工作站数量可以减轻每个网段的压力，提高网络速度和可...     

Optical Materials

Coretech Crystal Division of Shanda Luneng Information Technology Co., Ltd. Product: KTP (Potassium Titanyl Phosphate) Applications: Frequency doubling (SHG) of Nd- doped lasers for green/red light generation, frequency mixing (SFM) of Nd laser and diode laser for blue light genera- tion, parametric sources (OPG, OPA and OPO) for 0.6￣4.5 μm tunable light generation, optical waveguides for integrated NLO and E- O Devices. Product: KTA (Potassium Titanyl Arsenate) Application…     

Optical Materials

Bluelightning Optics Co.,Ltd(BOC) Nd:YLF and Cr:LiSAF Laser rystal: The growing technology of laser crystal is the advanced technology, involving material, physics, chemistry , optics and mechanical & electrical technology. The main production procedure of the crystal includes crystal growing, optical processing, coating, quality examination. Each link has its own characteristics and high-tech content.     

Optical Materials

Juhua Group Xinghua Crystal Materi- als FactoryProduct: Sapphire(a- Al2O3)Crystal Applications:Ultraviolet- , infrared- multiband window. Product: Nd∶YAG Applications:Laser materialContact: Juhua Group Corpration Quzhou, Zhejiang Province, China (324004) Tel:+86- 570- 3094708 3092659 Fax:+86- 570- 3092659 3097343 E- mail:sungn2002@vip.163.com Website:http://www.jhcrystals.com Coretech Crystal Division of Shanda Luneng Information Technology Co., Ltd. Product: KTP (Potassium T…     

Improvement on Switching Characteristics and Switching Losses of IGBT by ZVS—PWM^①

The principle of ZVS-PWM inverting circuit is first described by means of inverting welder supply.The contrastive study is made on switching characteristics and switching losses of IGBT between ZVS-PWM and hard-switching.     

Modern Optical Engineering

Third editionEdited by Warren J.SmithMain Contents·General Principles·Image Formation（first-order optics）·Aberrations·Prisms and Mirrors     

Modern Optical Engineering

Third editionEdited by Warren J.SmithMain Contents·General Principles·Image Formation（first-order optics）·Aberrations     

Optical Properties of MQW Optical Waveguides in Electroabsorption MQW Modulator

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A Switching Testbed for ATM Ring Exchange

ＡＳｗｉｔｃｈｉｎｇＴｅｓｔｂｅｄｆｏｒＡＴＭＲｉｎｇＥｘｃｈａｎｇｅＬｉｕＢｉｎ；ＣｈｅｎｇＳｈｉｄｕａｎ；ＣｈｅｎＪｕｎｌｉａｎｇＡＮＤＷａｎｇＸｉｎｌｉｎｇ（ＳｔａｔｅＫｅｙｔｏｂｏｒａｔｏｒｙ，ＢｅｉｊｉｎｇＵｎｉｖｅｒｓｉｔｙｏｆＰｏｓｔｓ...     

Optical Instruments and Components

Beijing Optical Instrument PlantProduct:High- precision Motorized Rotating Stage Model: MRS211 Specifications:Accuracy:2″, grating index dial, liquid crystal display. Product:High- precision Motorized Translation Stage Model: MTS317 Specifications:Stroke 400, linear slide block+ball guide screw(precision). Product:High- accuracy Motorized Translation Stage Model: MTS603 Specifications:Stroke 150, linear slide block (high- ac- curacy).Product:Precision Motorized Tilting Stage M…     

Optical Instruments and Components

Beijing Optical Instrument Plant Product:High- Precision Motorized Rotating Stage Model: MRS211 Specifications:Accuracy:2″,grating index dial ,liquid crystal display. Product:High- Precision Motorized Translation Stage Model: MTS317 Specifications:Stroke 400,linear slide block +ball guide screw(precision). Product:High- Accuracy Motorized Translation Stage Model: MTS603 Specifications:Stroke 150,linear slide block (high- accu- racy). Product:Precision Motorized Tilting Stage …     

A Novel FPSM Controller for DC-DC Switching Converters

This paper presents a novel fuzzy pulse skip modulation （FPSM） controller for switching direct current to direct current （DC-DC） converters based on fuzzy ratiocination modeling approach. Owing to the optimal consideration during the design and the nonlinear characteristics of the controller, improved dynamic responses of the FPSM controller can be achieved over conventional controllers. Compared with conventional proportion integral derivative （PID） control, FPSM control has 60% lower overshoot and 10% lower setting time under the same input voltage and output load change. The presented approach is general and can be applied to other types of DC-DC converters.     

Research on Optical Interconnection Network

Perfectshuffle(PS)isabasicandessentialpermutationfunction.Becauseofitsregularityandsymmetry,itissuitableforimplementationbyopticalelements,therefore,itisoneofthefocusesintheresearchofopticalinterconnections.Inthispaper,severaltheoreticalproblemsandexperimentsabouttheopticalimplementationsofPSand4×4photonswitchingarestudied.Chapter1givesadetailedintroductiontotheorigination,classificationanddevelopmentofopticalinterconnections.Chapter2describestheformationofomegainterconnectionnetworksandint…