学科分类
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329 个结果
  • 简介:AslowlightstructureMach-Zehnderfiberinterferometeristheoreticallydemonstrated.Thesensitivityoftheinterferometerissignificantlyenhancedbythedispersionoftheslowlightstructure.Thenumericalresultsshowthatthesensitivityenhancementfactorvarieswiththecouplingcoefficientandreachesitsmaximumundercriticalcouplingconditions.

  • 标签: 光纤干涉仪 马赫 轻型结构 耦合条件 计算结果 增强因子
  • 简介:聚合Mach-Zehnder肋骨波导的系统的分析基于计算和优化被介绍。模拟与有效索引方法(EIM)被执行并且二维(2-D)有限差别横梁繁殖方法(FD-BPM)。在连续聚合物层之间的大折射索引步被使用EIM减少,因此,计算的精确被保证。象Y连接角度和分离差距那样的波导的重要参数被讨论,他们与光力量繁殖和损失特征的关系在这篇论文被调查。优化结构的全部的损失是0.258dB。CLC数字TN252这个工程被基础为武器设备的进展研究节目支持,中国(资助No.02040105DZ02)。

  • 标签: 聚合物材料 Mach-Zehnder条形波导 结构优化 集成光波导器件
  • 简介:Anup-taperedMach-Zehnderinterferometer(MZI)isproposedanddemonstrated.Byapplyingamodificationsettingofanexistingprogramofthefusionsplicer,twoup-tapersarefabricatedbypushingbothsidesofthefibertothemiddle.Itisfoundthatthemaximumextinctionratioreachesupto20dB.Withthefiberlengthof6.3-49cmbetweenthetwoup-tapers,thefreespectralrange(FSR)changesfrom10.7nmto1.3nm.Besides,thewavelengthofmaximumextinctionratioshiftstotheshorterwavelengthinthescopeoftensofnanometers,whiletheelongationchangesfrom0%to0.23%.

  • 标签: MACH-ZEHNDER干涉仪 光纤熔接机 锥形光纤 马赫 制造 自由光谱范围
  • 简介:利用Hermite—Gauss函数、模式干涉理论以及电场矢量线性叠加方法,分析了高阶模经光纤MachZehnder干涉仪后的输出光场的空间干涉现象,得出了两个高阶模之间干涉光场的公式,计算出了双模光纤中各模式之间空间干涉的光场。数值仿真结果表明二阶模之间的干涉光场是两个相同的圆形光斑,而基模和二阶模之间的干涉光场是两个不等大的圆形光斑。

  • 标签: Mach—Zehnder干涉仪 高阶模 基模 空间干涉
  • 简介:Fiber-opticMach-Zehnderinterferometer(MZI)canbeusedaswavelength-multiplexersanddemultiplexers.The△Land△φdirectlyinfluencethepropertiesofMZI.Tolengthenthe△Lcandemultiplexmuchmorewavelengths,butwhenthe△Lislonger,thetemperaturewillinfluenceMZImoreseriously.Amethodtosolvethisproblemisproposed,whichenablesMZItoworkstably.Thewavelengthdistanceis0.8nm,andtheextinctionratioishigh.

  • 标签: MACH-ZEHNDER INTERFEROMETER COUPLER Wavelength MULTIPLEXERS and
  • 简介:阐述了一种由2×2耦合器和3×3耦合器构成的光纤MachZehnder干涉仪(MZI),推导了干涉仪三个输出端光功率的表达式。由于光纤本身的特性,光纤构成的MZI容易受到外界环境的影响,针对这一问题,采用了一种平衡检测相位补偿方法。该方法是通过两个PIN分别对3×3耦合器两路光信号进行接收,并对两路光信号进行差动放大。实验表明该方法可以很好地消除外界环境对MZI干涉效果的影响。

  • 标签: Math—Zehnder干涉仪 相位补偿 3×3耦合器 相位调制
  • 简介:Foranintegratedelectro-opticalsensor,theoperatingpointhasasignificanteffectontheperformanceofthesensor.Inthispaper,anopticalwaveguideelectricfieldsensorwithcontrollableoperatingpointisdesignedusingLiNbO3materials,whichhasanasymmetricMach-Zehnderinterferometer(MZI)structure.Theoreticalresultsshowthattheoptimaloperatingpointcanbeobtainedandcontrolledbytuningtheoutputwavelengthofthetunablelaserusedinthesensingsystem.Thesimulationresultsshowthatthesensitivityabout83dB·μV/mcanbeobtained,andthelineardynamicrangeaslargeas60dBcanbeachieved.Andthefabricationtoleranceofthecenter-to-centerdistanceforthe3dBcouplerusedintheasymmetricMZIis~0.5μm,whilethepowersplittingratiooftheYbranchiswithmoretolerance.

  • 标签: 电场传感器 结构可控 非对称 光学波导 马赫 铌酸锂材料
  • 简介:TheNANDoperationat250Gbit/sbasedonquantumdot-semiconductoropticalamplifiers(QD-SOAs)ismodeled.BysolvingtherateequationsofSOAsintheformofaMach-Zehnderinterferometer(MZI),theperformanceofNANDgateisnumericallyinvestigated.Themodeltakestheeffectsofampli?edspontaneousemission(ASE)andtheinputpulseenergyonthesystem'squalityfactorintoaccount.ResultsshowthatNANDgateinQD-SOA-MZIbasedstructureisfeasibleat250Gbit/swithaproperqualityfactor.Thedecreaseinqualityfactorispredictedforhighspontaneousemissionfactor(NSP).Foranidealamplifier(NSP=2),theQ-factoris17.8for30dBgain.

  • 标签: 半导体光放大器 MACH-ZEHNDER 量子点 干涉仪 “与非”门 放大的自发辐射
  • 简介:有可变系数的一个微波photonic过滤器(MPF)被建议并且示威,它被多波长纤维激光和Mach-Zehnder干涉仪(MZI)构造。通过改变Mach-Zehnder干扰的斜坡特征,光谱由光可变延期线(OVDL)调整了,到紧张调整(IM)的从阶段调整(下午)的变换被认识到。有Lyot-Sagnac光过滤器的多波长纤维激光有可变波长间距。设计过滤器因此有龙头和龙头重量的一个可变数字。作为结果,通带中心频率的悦耳的范围是2.6GHz。MPF的可配置性能被调整纤维激光的产量也认识到。

  • 标签: 多波长光纤激光器 MACH-ZEHNDER 微波光子 滤波器 干涉仪 变量系数
  • 简介:AFourieranalysisappliedtotheMach–Zehnderinterferometer(MZI)transmissionspectrumforsimultaneousrefractiveindex(RI)andtemperaturemeasurementsisproposedandexperimentallydemonstratedinthisLetter.InthefastFouriertransform(FFT)spectrumoftheMZItransmissionspectrum,severalfrequencycomponentsaregenerallyobserved,whichmeansthatthetransmissionspectrumoftheMZIisformedbythesuperpositionofsomedual-modeinterference(DMI)spectra,andeachfrequencycomponentrepresentsdifferentcore-claddinginterferences.WecanselectsomedominantfrequencycomponentsintheFFTspectrumoftheMZItransmissionspectrumtotaketheinverseFFT(IFFT).Then,thecorrespondingDMIpatternscanbeobtained.DuetotheshiftofthewavelengthoftheseDMIspectrawithchangesintheenvironmentalparameters,wecanusethecoefficientmatrixoftheseDMIspectraformulti-parametersensing.InthisLetter,twoDMIpatternsareseparatedfromtheresultanttransmissionspectrumoftheMZI.AstheRIandtemperaturechange,theshiftsofthetwoDMIpatternswithrespecttotheRIandtemperaturewillbeobserved.ThesensitivitiesoftheRIandtemperatureare-137.1806nm∕RIU(RIunit)and0.0860nm∕°C,and-22.9955nm∕RIUand0.0610nm∕°CforthetwoDMIs.Accordingly,itcanbeusedtosimultaneouslymeasureRIandtemperaturechanges.Theapproachcaneliminatetheinfluenceofmultipleinterferencesandimprovetheaccuracyofthesensor.

  • 标签: 温度测量 干涉仪 折射率 全光纤 DMIS 快速傅里叶变换
  • 简介:Anovelphotonic-assistedapproachtomicrowavefrequencymeasurementisproposedandexperimentallydemonstrated.Theproposedschemeisbasedonthefrequency-to-powermappingwithdifferenttransmissionresponses.Apolarizerisusedinoneoutputbranchofaphasemodulatortosimultaneouslyimplementphasemodulationandintensitymodulation.OwingtothecomplementarynatureofthetransmissionresponsesandtheMach-Zehnderinterferometers(MZIs),thisschemetheoreticallyprovideshighresolutionandtunablemeasurementrange.Themeasurementerrorsintheexperimentalresultscanbekeptwithin0.2GHzoverafrequencyrangefrom0.1to5.3GHz.

  • 标签: MACH-ZEHNDER干涉仪 微波频率测量 调谐范围 光子 相位调制器 瞬时
  • 简介:传统的不对称的Mach-Zehnder干涉仪(AMZI)上的分析基于方向性的couplers(DC)显示出的二3dB,那由产生阶段的coupler(PGC)由增加一个另外的非线性的阶段产生了到AMZI的原来的阶段差别的光过滤器,它的非周期性的频率反应能被修改,并且一个严格地周期的系列能被获得。用在AMZI区域前后的二PGC的AMZI过滤器的新奇结构被建议。与20nm的需要的免费光谱范围(FSR),设备的设计和优化作为缓冲区作为核心和PMMA-GMA用聚合物SU-8被执行。尽管插入损失(IL)变得比传统的AMZI过滤器的大,FSR作为20nm的期望的时期将近一致。

  • 标签: 周期性 聚合物 过滤器 干涉仪 性能分析 马赫
  • 简介:由一种Mach-Zehnder(MZ)类型组成的一个常规LiNbO3紧张调节的人的特征退火了质子交换(无尾猿)波导和共面的波导(CPW)调整电极被介绍。有进程参数的无尾猿波导特征和他们的关系被分析。同时,调整电极的电的特征例如调整电压,有效索引与调整带宽联系了的微波,特征阻抗,也详细被调查。

  • 标签: 退火质子交换波导 铌酸锂亮度调制器 共平面形波导 调制电极
  • 简介:由在活跃区域和杆聚合物的Pockels效果使用poled-polymer/silicon槽波导,我们建议一种Mach-Zehnder干涉仪(MZI)电镀物品眼(EO)开关在1550nm操作了。结构的参数为认识到正常切换的功能被优化。在槽波导参数上交换特征的相关性被调查。与170nm慭据?景瀠汯浹牥猠汯牡挠汥獬的尺寸为硅脱衣

  • 标签: 极化聚合物 电光开关 超低电压 MACH 槽波导 干涉仪
  • 简介:ThisworkpresentsanopticalmethodusingtheMach–Zehnderinterferometer.Weespeciallydiagnoseapurenitrogengassubjectedtoapointtoplanecoronadischarge,andvisualizethedensityspatialmap.Theinterelectrodedistanceequals6mmandthevariationoftheopticalpathhasbeenmeasuredatdifferentpressures:220Torr,400Torr,and760Torr.TheinterferogramsarerecordedwithaCCDcamera,andthenumericalanalysisoftheseinterferogramsisassuredbytheinverseAbeltransformation.ThenitrogendensityisextractedthroughtheGladstone–Dalerelation.Theobtainedresultsareincloseagreementwithvaluesavailableintheliterature.

  • 标签: 氮密度 干涉仪 马赫 映射 CCD摄像机 逆阿贝尔变换
  • 简介:Weexperimentallydemonstratea16×16reconfigurablynonblockingopticalswitchfabricusingaBenesarchitecture.Theswitchfabricconsistsof562×2Mach–Zehnderinterferometerbasedelementaryswitches,witheachintegratedwithapairofwaveguidemicroheaters.Theaverageon-chipinsertionlossis~5.2dBforbothofthe'all-cross'andthe'all-bar'states,withalossvariationof1dBoverallroutingpaths.Thecrosstalkforallswitchingstatesisbetterthan-30dB.Theswitchingtimeoftheswitchelementisabout22μs.Theswitchingfunctionalityisverifiedbytransmissionofa40Gb∕squadraturephase-shiftkeyingopticalsignal.

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  • 简介:Wepresentanequivalentcircuitmodelforasiliconcarrier-depletionsingle-drivepush–pullMach–Zehndermodulator(MZM)withitstravelingwaveelectrodemadeofcoplanarstriplines.Inparticular,thepartialcapacitancetechniqueandconformalmappingareusedtoderivethecapacitanceassociatedwitheachlayer.ThePNjunctionisaccuratelymodeledwiththefringecapacitancestakenintoconsideration.Thecircuitmodelisvalidatedbycomparingthecalculationswiththesimulationresults.Usingthismodel,weanalyzetheeffectofseveralkeyparametersonthemodulatorperformancetooptimizethedesign.ExperimentalresultsofMZMsconfirmthetheoreticalanalysis.A56Gb/son–offkeyingmodulationanda40Gb/sbinaryphase-shiftkeyingmodulationareachievedusingtheoptimizedmodulator.

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  • 简介:Anultrasensitivemagneticfieldsensorbasedonacompactin-fiberMach–Zehnderinterferometer(MZI)createdintwin-corefiber(TCF)isproposed,anditsperformanceisexperimentallydemonstrated.AsectionofTCFwassplicedbetweentwosectionsofstandardsingle-modefibers,andthenamicrochannelwasdrilledthroughonecoreoftheTCFbymeansoffemtosecondlasermicromachining.TheTCFwithonemicrochannelwasthenimmersedinawater-basedFe3O4magneticfluid(MF),formingadirectcomponentofthelightpropagationpath,andthensealedinacapillarytube,achievingamagneticsensingelement,whichmergestheadvantagesofanMZIwithanMF.Experimentswereconductedtoinvestigatethemagneticresponseoftheproposedsensor.Thedevelopedmagneticfieldsensorexhibitsalinearresponsewithinameasurementrangefrom5to9.5mTandanultrahighsensitivityof20.8nm/mT,which,toourbestknowledge,is2ordersofmagnitudegreaterthanotherpreviouslyreportedmagneticsensors.Theproposedsensorisexpectedtooffersignificantpotentialfordetectingweakmagneticfields.

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  • 简介:Wedemonstrateanovelhigh-accuracypost-fabricationtrimmingtechniquetofine-tunethephaseofintegratedMach–Zehnderinterferometers,enablingpermanentcorrectionoftypicalfabrication-basedphaseerrors.Theeffectiveindexchangeoftheopticalmodeis0.19inourmeasurement,whichisapproximatelyanorderofmagnitudeimprovementcomparedtopreviousworkwithsimilarexcessopticalloss.Ourmeasurementresultssuggestthataphaseaccuracyof0.078radwasachievablewithactivefeedbackcontrol.

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