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)。
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%.
简介:Fiber-opticMach-Zehnderinterferometer(MZI)canbeusedaswavelength-multiplexersanddemultiplexers.The△Land△φdirectlyinfluencethepropertiesofMZI.Tolengthenthe△Lcandemultiplexmuchmorewavelengths,butwhenthe△Lislonger,thetemperaturewillinfluenceMZImoreseriously.Amethodtosolvethisproblemisproposed,whichenablesMZItoworkstably.Thewavelengthdistanceis0.8nm,andtheextinctionratioishigh.
简介:Foranintegratedelectro-opticalsensor,theoperatingpointhasasignificanteffectontheperformanceofthesensor.Inthispaper,anopticalwaveguideelectricfieldsensorwithcontrollableoperatingpointisdesignedusingLiNbO3materials,whichhasanasymmetricMach-Zehnderinterferometer(MZI)structure.Theoreticalresultsshowthattheoptimaloperatingpointcanbeobtainedandcontrolledbytuningtheoutputwavelengthofthetunablelaserusedinthesensingsystem.Thesimulationresultsshowthatthesensitivityabout83dB·μV/mcanbeobtained,andthelineardynamicrangeaslargeas60dBcanbeachieved.Andthefabricationtoleranceofthecenter-to-centerdistanceforthe3dBcouplerusedintheasymmetricMZIis~0.5μm,whilethepowersplittingratiooftheYbranchiswithmoretolerance.
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.
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。