简介:Fiber-opticFabry-Perot(F-P)sensorsarewidelyinvestigatedbecausetheyhaveseveraladvantagesoverconventionalsensors,suchasimmunitytoelectromagneticinterference,abilitytooperateunderbadenvironments,highsensitivityandthepotentialformultiplexing.Anewmethodtofabricatemicro-cavityFabry-Perotinterferometerisintroduced,whichisfusionsplicingasectionofconventionalsingle-modefiber(SMF)andasectionofhollowcoreorsolidcorephotoniccrystalfiber(PCF)togethertoformamicro-cavityatthesplicejoint.Thetechnologyoffusionsplicingisdiscussed,andtwominiatureopticalfibersensorsbasedonFabry-Perotinterferenceusingfusionsplicingarepresented.Thetwosensorsarecompletelymadeoffusedsilica,andhavegoodhigh-temperaturecapability.
简介:GratingAngular-movementTransducerUsingaFabry-PerotStructure①LIZhiquan(YanshanUniversity,Qinghuangdao066004,CHN)Abstract:Anove...
简介:AnovelschemeofopticalpowerequalizationbasedonFabry-Perotsemiconductoropticalamplifier(FP-SOA)isproposed.BecauseofthegaincharacteristicofFP-SOA,real-timecontrollingmechanismaccordingtoinputopticalpowerisabortedinthescheme.Thesimulationsshowthat10-dBpulsepeakpowervariationcanbeclampedinlessthan1dB.Theinfluencesofinjectingcurrent,pulseperiods,andpulsewidtharediscussed.
简介:摘要:分析了Fabry-Perot滤波器的工作原理,设计了基于全光纤Fabry-Perot滤波器的光谱检测装置,通过对滤波器中的压电陶瓷施加周期性的锯齿波电压,并采用内置光源对测试光谱进行校准,降低F-P滤波器迟滞效应对光谱检测准确度的影响,实现了1530nm~1570nm波段内的光谱检测,光谱分辨率0.2nm,波长准确度±0.05nm,可满足各类近红外半导体激光光源(如DFB-LD、SLD、FP-LD、LED等)的光谱特性、光纤及光纤放大器的光波传输特性、光纤传感器的反射特性等的L波段测试,与衍射光栅型光谱分析仪相比,具有体型小、测试速度快、成本低和便于模块化生产等优点。
简介:一个新奇计划所有光并且门基于一个Fabry-Perot半导体,光放大器(FP-SOA)被建议,它的可行性被模拟验证。用这个计划,所有光并且门能与10dB的扑灭比率被认识到。扑灭比率上的脉搏间隔和脉搏宽度的影响也被调查。
简介:可调谐Fabry-Perot滤波器在光纤光栅传感及光纤通信中有重要的应用,文章对几种新型的Fabry-Perot滤波器的结构,性能和用途进行了介绍,给出了其发展趋势.
简介:Ahigh-precisionwavelengthcontrollerispresentedinthispaper.ItisnecessarytofindoutthedifferencebetweenthecentralwavelengthofatunablefiberFabry-Perot(FFP)filterandthatoftheinputlaser,whilethewavelengthcontrol-leroperatesatthestatesofwavelength-scanningandwavelength-lockingmodes.Firstly,adynamicsimulationmodeloftunableFFPfilterisestablished,andthedynamiccharacteristicoftunableFFPfiltermodulatedbyanalternatingcurrent(AC)signalissimulated.Thenthemeasuringtimeatwavelength-scanningmodecomparedwiththetheorytimeisdiscussed,andthistimedifferenceshowsthedifferencebetweenthecentralwavelengthofatunableFFPfilterandthatoftheinputlaser.Atlast,theeffectsonwavelength-lockingprecisionoftimedelays,includingthetimedelayofopened-loopcircuit,thetimeconstantoftheclosed-loopcircuitandtheintrinsichysteresisofpiezoelectric(PZT)element,areanalyzed.AwavelengthcontrolleroftunableFFPfilterisdesignedandprepared.Theexperimentalresultsatwavelength-lockingmodeshowthatahighlockingprecisionisobtained.
简介:Atunablesingle-passbandmicrowavephotonicfilterisproposedanddemonstrated,basedonalaserdiode(LD)arraywithmultipleopticalcarriersandaFabry-Perot(F-P)laserdiode.MultipleopticalcarriersinconjunctionwiththeF-PLDwillrealizeafilterwithmultiplepassbands.Byadjustingthewavelengthsofthemultipleopticalcarriers,multiplepassbandsaremergedintoasinglepassbandwithabroadenedbandwidth.Byvaryingthenumberoftheopticalcarrier,thebandwidthcanbeadjusted.Thecentralfrequencycanbetunedbyadjustingthewavelengthofthemultipleopticalcarrierssimultaneously.Asingle-passbandfilterimplementedbytwoopticalcarriersisexperimentallydemonstrated.
简介:Reflectorsareanessentialcomponentforon-chipintegratedphotonics.Here,weproposeanewmethodfordesigningreflectorsontheprevalentthin-film-on-insulatorplatformbyusinggenetic-algorithmoptimization.Insimulation,thedesignedreflectorwithafootprintofonly2.16μm×2.16μmcanachieve~97%reflectivityand1dBbandwidthaswideas220nm.Thestructureiscomposedofrandomlydistributedpixelsandishighlyrobustagainsttheinevitablecornerroundingeffectindevicefabrication.Inexperiment,wefabricatedon-chipFabry–Perot(FP)cavitiesconstructedfromoptimizedreflectors.ThoseFPcavitieshaveintrinsicqualityfactorsof>2000withthehighestvaluebeyond4000inaspectralwidthof200nm.ThereflectivityfittedfromtheFPcavityresonancesis>85%intheentirewavelengthrangeof1440–1640nmandisbeyond95%atsomewavelengths.ThefabricationprocessesareCMOScompatibleandrequireonlyonestepoflithographyandetch.Thedevicescanbeusedasastandardmoduleinintegratedphotoniccircuitryforwideapplicationsinon-chipsemiconductorlaserstructuresandopticalsignalprocessing.
简介:Cavity-coupledplasmonicstructureisdemonstratedtobeasimpleandeffectivetooltomanipulatelight,enhancethebiosensingfigureofmerit,andcontrolthepolarizationstate.InthisLetter,wedemonstratethetunabilityofthechiropticaleffectofcavity-coupledchiralstructure,i.e.,sandwichchiralmetamaterials(SCMs),inwhichradiationcouplingdominatestheinteractionbetweenparticles.TwotypesofSCMswhosebuildingblocksare3Dchiraland2Dchiral,respectively,arenumericallystudied.Distinctresponsesareobservedinthesetwomaterials.Thechiropticaleffectcanbeeffectivelymanipulatedandenhancedinthe2Dcase,whiletheSCMsconsistingof3Dchirallayerskeepthechiropticaleffectaconstant.Atheoreticalanalysisbasedonmatrixopticsisdevelopedtoexplainthecorrespondingphenomena,whichgivesareasonableagreementwithnumericalsimulations.
简介:Wedevelopahybridoptofluidicmicrocavitybyplacingamicrospherewithadiameterrangingfrom1to4μminliquid-filledplano-planoFabry–Perot(FP)cavities,whichcanprovideanextremelyloweffectivemodevolumedownto0.3–5.1μm^3whilemaintainingahighQ-factorupto1×10^4–5×10^4andafinesseof~2000.Comparedtothepureplano-planoFPcavitiesthatareknowntosufferfromthelackofmodeconfinement,diffraction,andgeometricalwalk-offlossesaswellasbeinghighlysusceptibletomirrormisalignment,ourmicrosphere-integratedFP(MIFP)cavitiesshowstrongopticalconfinementinthelateraldirectionwithatightmoderadiusofonly0.4–0.9μmandhightolerancetomirrormisalignmentaslargeas2°.Withthemicrosphereservingasawaveguide,theMIFPisadvantageousoverafiber-sandwichedFPcavityduetotheopen-cavitydesignforanalytes/liquidstointeractstronglywiththeresonantmode,theeaseofassembly,andthepossibilitytoreplacethemicrosphere.Inthiswork,themaincharacteristicsoftheMIFP,includingQ-factor,finesse,effectivemoderadiusandvolume,andtheirdependenceonthesurroundingmedium’srefractiveindex,mirrorspacing,microspherepositioninsidetheFPcavity,andmirrormisalignment,aresystematicallyinvestigatedusingafinite-elementmethod.Then,byinsertingdye-dopedpolystyrenemicrospheresofvarioussizesintotheFPcavityfilledwithwater,weexperimentallyrealizesingle-modeMIFPoptofluidiclasersthathavealasingthresholdaslowasafewmicrojoulespersquaremillimeterandalasingspotradiusofonly~0.5μm.OurresultssuggestthattheMIFPcavitiesprovideapromisingtechnologyplatformfornovelphotonicdevicesandbiological/chemicaldetectionwithultra-smalldetectionvolumes.
简介:Fabry病是一种X性连锁隐性遗传性疾病,1898年首次由皮肤科医生Anderson和JohannFabry各自报告1例,故名Andemon-Fabry’病,简称Fabry病。本病患者由于基因突变导致细胞溶酶体中水解酶——啦半乳糖苷酶A(a2GalA)先天缺乏或活性降低,致使糖鞘脂成分如神经酰胺三己糖苷(CTH或称为Gb3),以及二乳糖苷神经酰胺等堆积于体内各器官,如肾脏、心血管系统、神经系统等,引起患者多个系统出现相应的临床表现如肢端疼痛和感觉异常、皮肤血管角质瘤、少汗、心血管损伤及肾衰竭等,故又称a2GalA缺乏症。