学科分类
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24 个结果
  • 简介:Anoveltheoreticalmodelofthermaldiffusionhasbeenestablishedtostudythermalinteractionbetweentwoneighboringdiodsinsemiconductorlaserarrays.Themaincauseoftheocurrenceofthethermalinteractionbetweentwoneighboringdiodesinarraydevicesistheheatconductionthroughheatsink.Weholdthatasthedevicesmusyhaveheatsinktodiffuseheat,thiskindofinteractioninthearraywouldalwaysexist.However,whenthepitchbetweentwoneighboringdiodesinthearrayisreasonablydefined,thistroublesomethermalinteractioncanbesimplyreducedbyusingourmodel.Basedontheindividualdiodeswithleakywaveguidestructure,weexperimentallysucceededinfabricating2D4×4arrays.Thethermalinteractionbetweenupperandlowerdiodesinthe2Darrayisalsoconsideredaswellasthefunctionoftheheatsink.Themeasuredresultsshowthatthepulsepeakoutputpowerofthe2D4×4arrayishighupto11W.

  • 标签: 热交互作用 热扩散 二维列车 开槽波导 半导体激光器
  • 简介:波导戒指共鸣器的一种类型,基于Er3+/Yb3+共同做的磷酸盐玻璃和是的使用的热光的效果调节举止,被带上。戒指共鸣器与400m的半径由二直波导和戒指波导组成。电极在波导的顶上被蒸发完成热调节。第一,戒指共鸣器的过滤计划被分析,然后,电极的参数怎么影响过滤特征,被讨论。

  • 标签: 环形谐振腔 热调谐 磷酸盐玻璃 波分多路复用 滤光器
  • 简介:与密码学的快速的发展,安全协议和加密算法的力量过量地依靠随机数的质量。在许多密码学应用程序,更高的速度是要求的引用之一。新安全随机数生成程序体系结构被介绍。它的哲学建筑学与FPGA被实现,基于热噪音和线性反馈位移寄存器(LFSR)。热噪音initializesLFSRs并且被用作系统的打扰的来源保证生产随机数的unpredictability并且改进系统的安全力量。平行LFSR能与长时期和更高的速度生产伪随机数。建议建筑学罐头在密码学满足高质量、高的速度的要求。

  • 标签: 热噪音 平行反馈 密码学 安全性
  • 简介:为了为光电子满足当前的高效光电子,有双同轴的包裹(剧降)的二种包裹类型和球格子数组(BGA)的电、热的表演要求,被建模并且热地模仿了,他们的热描述被在免费的空中使用温度轮廓和模仿的加热描述曲线比较并且讨论并且强迫了空气周围。结果证明那BGA有上级在内并且在全部的表演外面,并且在高度综合的光电子有有希望的未来。

  • 标签: 热性质 光电子模块 数字模拟 DIP BGA
  • 简介:在钨卤素灯的安排和晶片收到的发光的一致性之间的关系被讨论,并且一种axial-symmetricallamps-array被设计保证边上的照耀是近似一样的著名计算机生产厂商他晶片的中心上的。晶片对力量oftungsten卤素灯上的温度的大小数字地被计算。

  • 标签: 大直径晶片 快速热处理 钨卤素灯 退火处理
  • 简介:Aninfraredreal-timeimagingsystemusingDSP(digitalsignalprocessor)asthekernelofdigitalsignalprocessingboardispresented.Inthissystem,theimagingdifferenceandnonuniformitycorrectionmethodisdevelopedonthechiptakingadvantageofDSPwithhighspeed.Themethodcombineshardwareandsoftwaretogether,sothatthedifficultyforrealizingsuchamethodwithotherhardwarecanbeovercome.

  • 标签: 数字信号处理器 计算机 图像 不均匀性 红外热系统
  • 简介:Inrecentyears,thepotentialofrenewablegreenenergysourceshasbeenextensivelystudied.Theproventechnologywhichisphotovoltaicsolarcellsstrictlydependsondaylightandproduceslow-efficiently.Toovercometherestrictions,onetechnologystudiedisthroughharvestingthethermalradiationenergywhichcanprovidea24-hourenergysource.Thecontinuityofenergysourcespromisesverygoodenergyconversionespeciallyformilitaryapplications.Thisarticlepresentsanewstructurethatcanharvesttheabundantthermalradiationenergyintousableenergyatthewavelengthof10μm.Arectangularstructurewithaperturbationslitwasdesignedtointegratewitharectifiercircuitforgreenenergyconversion.Theslittunneljunctionguidedtheelectromagneticfieldintoajunctionwheretheenergycouldbecollectedandconverted.Anenhancementfactorofapproximately110.6canbeachievedbyaperturbationslitlengthof1.0μm.Theresultsextractedfromtheproposeddesignpromiseabettercandidatetoovercomethedisadvantagesofphotovoltaicsolarcellsforenergyharvestingdevices.

  • 标签: Enhancement factor green energy harvesting RENEWABLE thermal radiation
  • 简介:photonic水晶的热性质有18个循环地分布式的核心的纤维(PCF)激光被使用完整向量的有限元素方法调查(女性)。结果证明18核心PCF与单个核心PCF和19核心PCF相比举办更有效的热分散建设。另外,有不同热负担的18核心PCF激光的温度分发被模仿。当热负担在近似对应于600W的抽的力量的80W/m上面时,结果证明核心温度接近近似拉1800K的价值的纤维,当当热负担在近似对应于110W的抽的力量的15W/m上面时,涂层温度接近大约550K的损坏价值时。因此冷却的纤维是必要的完成力量可伸缩。与另外的不同冷却系统相比,使计划凉下来的铜被发现是一个有效方法减少热效果。

  • 标签: 光子晶体光纤激光器 热分布 多核心 矢量有限元法 核心温度 冷却系统
  • 简介:ThemorphoussiliconfilmspreparedbyPECVDatsubstratetemperaturesof30℃havebeencrystallizedbyrapidthermalannealingmethod,thebudgetoftime-temperatureintheannealingprocessis600℃for120s,850℃for120s,and950℃for120s.Theresultsindicatethecrystallizationat850℃and950℃arebetterasshowninmicro-Ramanscatteringandscanningelectronicmicroscope.

  • 标签: 固相晶化 非晶硅 快速热退火 PECVD
  • 简介:Athermalmodelofcrystalisestablished.Thetemperaturefielddifferentialequationofthediode-end-pumpedlasercrystalwithcircularcross-sectionandnewboundaryconditions,inwhichtheconvectionheattransferissupposedtoexistbetweenlasercrystalendsandair,isestablished.Theanalyticalexpressionsoftemperaturefield,thermaldistortionandadditionalopticalpathdifference(OPD)ofcrystalareobtained.Bynumericalcalculation,theinfluenceofheattransferonthethermaleffectsoflasercrystalNd:YAGisstudied.Resultsshowthatcrystal'sthermaleffects,includingtemperaturefield,thermaldistortion,OPDandthermalfocallength,areallweakenedastheheattransferthroughendsofcrystalisstrengthened.Thisconclusioncouldbeusedtocontrolthermaleffectsoflasercrystalandimprovelaserworkingstability.

  • 标签: 二极管端面泵浦 激光晶体 热效应 传热 解析表达式 附加光程差
  • 简介:Thethermaldistortionofanopticalreflectorsurfaceduetothechangingsunlightinaspaceenvironmentwillcauseshiftandspreadingofitsreflectedfocusandtherebyinfluencetheperformanceofspace-to-groundlasercommunicationlinks.Basedonthecharacteristicsofaloworbitsatellite,thenormalshiftofaplanmirrorcausedbythermaldistortionisanalyzedwiththesoftwareoftheANSYSoffiniteelementanalysis.Ageneralexpressionofthetransmittedbeamfromadistortedreflectorsurfaceandacountingformulafortheshiftsofthefocuscenterbeforeandafterthermaldistortionarededuced.Theresultofsimulationshowsthatthemagnitudeorderofthenormalshiftoftheantennamirrorsurfacecanbeashighastensofμrad.Theworsethemirrorthermaldistortionis,thelargertheshiftofthereceivedfocuscenteris.Andthechangeoftheshiftsdoesnotobeyalinearrule.

  • 标签: 激光通信 数字分析 热传递 光学反射 空间环境
  • 简介:SEMandPositronAnnihilationTechnologyInvestigationontheDefectChangewithThermalTreatmentTemperatureinGaP①②ZHANGFujia,SHAOJiafen...

  • 标签: Defects POSITRON LIFETIME THERMAL TREATMENT
  • 简介:Theeffectofmesasizeonthethermalcharacteristicsofetchedmesavertical-cavitysurfaceemittinglasers(VCSELs)isstudied.ThenumericalresultsshowthatthemesasizeofthetopmirrorstronglyinfluencesthetemperaturedistributioninsidetheetchedmesaVCSEL.Underacertaindrivingvoltage,withdecreasingmesasize,thelocationofthemaximaltemperaturemovestowardsthep-contactmetal,thetemperatureinthecoreregionoftheactivelayerrisesgreatly,andthethermalcharacteristicsoftheetchedmesaVCSELswilldeteriorate.

  • 标签: 激光器 表面放射 热量特性 半导体 温度分布
  • 简介:ThephysicalandelectricalpropertiesofBF2+implantedpolysiliconfilmssubjectedtorapidthermalannealing(RTA)arepresented.ItisfoundthattheoutdiffusionofFanditssegregationatpolysilicon/siliconoxideinterfaceduringRTAarethemajorcausesofFanomalousmigration.FluorinebubbleswereobservedinBF2+implantedsamplesatdosesof1×1015and5×1015cm-2afterRTA.

  • 标签: Ion IMPLANTATION Rapid thermal ANNEALING FLUORINE
  • 简介:AsimulationmethodforthethermalanalysisofInAlAs/InGaAs/InPmid--infraredquantumcascadelasers(QCLs)basedonfinite--elementmethod(FEM)ispresented.ThethermaldistributionoftheQCLsonsubstrate--sideorepilayer--sidemountingformsissimulatedandtheresultsarecompared.Resultsshowthattheepilayer--sidemountingformhasmuchbetterheatdissipationcapabilitythanthesubstrate--sidemounting.

  • 标签: 热分析 InAIAs/InGaAs/InP QCLs 量子激光
  • 简介:ThetransientthermalcharacteristicsoftheridgewaveguideInAsP/InGaAsPMQWlasers,especiallyinvariouspulsedrivingconditions,havebeensimulatedbyusingFEM.Thetemperatureattheactivecoreofthelaserversusthetimehasbeencalculatedaswellaspulsewidthdependenceoftheapparentthermalresistance.Theresultsshowthatthethermalcharacteristicsofthelasersarerelatedtoboththethermalconductivityandthespecificheatofthematerials.

  • 标签: MQW激光器 温度分布 热敏电阻 FEM 波导 INASP/INGAASP
  • 简介:Anexperimentalwaytoanalyzethethermalcharacteriztionofsemiconductorlasersbasedonspectroscopymethodunderpulsedrivingconditionshasbeendeveloped,Byusingthiswaythethermalcharacteristicssofstraincompensated1.3μmInAsP/InGaAsPridgewaveguideMQWlaserdiodeshavebeeninvestigated.Resultsshovwthatbymeasuringandanalyzingthelasingspectraunderappropriatedrivingparametersandtemperatureranges,thethermalresistanceofthelaserdiodescouldbededucedeasily,Ahigerthermalresistanceof640K/Whasbeenmeasuredonanarrowridgelaserchipwithoutsoldering.Otherthermalandspectralpropertiesofthelaserhavealsobeenmeasuredanddiscussed.

  • 标签: 半导体激光 热特性 脊形波导 分光镜
  • 简介:Mesoscopic抑制了联合的相互的电容两倍回声电路被抑制泛音振荡器量子化的方法使量子化。Hamiltonian是由单一的转变的方法的diagonalized。这个电路的精力系列被给。费用的量变化和每个环的电流被thermofield动力学(TFD)的方法处于热刺激状态,热挤压的真空状态,热真空状态和真空状态调查。费用和水流的量变化与不仅电路有关是固有的参数并且联合刺激,挤压的系数,挤压的角度和环境温度的大小,而且量数字,这被显示出。并且量变化与时间随温度和腐烂的增加增加。CLC数字TN401由山东省,中国(No.XY05WL01)和大学的Heze大学的自然科学基础支持了山东省的试验性的技术基础,中国(No.S04W138)

  • 标签: 介观电容耦合阻尼 双谐振 RLC电路 热激发态 量子涨落
  • 简介:Thebuildingintegratedphotovoltaics(BIPV)applicationisoneofthemainstudytopicsinthesustainablebuildingfield.Inthispaper,thehighcolorrenderingindex(HCRI)-BIPVwindowsystemisdevelopedtobeusedintheindoorenvironmentalcontrol,whosemodulematerialhasappearedtobeeffectiveinimprovingthevisibletransmittanceandreducingtheabsorption.Thispaperdescribestheperformanceofgrid-connectedHCRI-BIPVwindowsystemwith0.75kWpcapacityinstalledinanofficebuildingforanaturalventilationsolution.TheexperimentalresultsindicatethataccumulativepowergenerationoftheHCRI-BIPVwindowsystemis157.60WKhduringthe7-monthexperimentperiod.Forconsiderationofeachevaluatedfactors,theHCRI-BIPVwindowsystemnotonlyoffersthepassiveenergysituationforitspowerloadingbutalsoimprovestheindoorthermalenvironmentbynaturalventilation.

  • 标签: 窗口系统 BIPV 电力消费 光学性质 热效应 室内环境控制
  • 简介:基于陷阱的p-i-n的I-V特征紫外察觉者被介绍。它在不同温度被测量并且与变化分析了温度。设备的想象力因素在房间温度是2.09。最大的想象力因素在100点是2.14,它超过100衰退,并且最小的想象力因素在300点是1.26。前面的电压对温度的系数是有1个妈的前面的电流的-1.97mV/。基于两倍注射模型,在i区的深躺杂质激活精力是0.1343eV。

  • 标签: 紫外光检测器 I-V热性能 氮化镓 活化能 PIN二极管