简介:Fromanordinarycondition,usingafullthree-dimensionalmodeltheoryandaninfiniteperturbationexpansionmethod,anexactsolutionofthere-flectioncoefficientforthecoatednarrowstripe-geometryopticalwaveguidedeviceshasbeenderived.Allsixcomponentsandthevectorpropertyoftheelectroma-gneticfieldhavebeenconsidered.Theresultsaresuitableforthesymmetricandasymmetricwaveguides.
简介:Adiodelaserarray(DLA)positionedinanexternalcavitycanreceivetheradiationsemittedfromitsneighboringelements(C1)andthatofitself(S)afterbeingreflectedattheDLAfacetaswellasfromtheexternalmirror(C0).Consideringthefactthat|C0/S|shouldbelargerthanunityiftheexternalcavityiseffective,and|C1/S|shouldbelargerthanunityifthephaselockingmaybeestablishedintheexternalcavity.Therequirementsonthereflectionatthefacetofthediodelaserarrayhavebeenspecifiedintermsofthecavitylengthandreflectioncoefficientoftheexternalmirror.
简介:有一个复杂系数的一个微波photonic槽口过滤器基于混合的四个波浪(FWM)被建议并且示威。二根单个频率的激光横梁的FWM效果发生在里面高度非线性的纤维(HNLF),和多波长光信号被产生并且过去常产生微波photonic过滤器(MPF)的多龙头。复杂系数被使用Fourier域产生光处理器(FD-OP)到控制光搬运人和阶段调整边带的振幅和阶段。结果证明这个过滤器能被控制FD-OP从通带过滤器改变到槽口过滤器。槽口过滤器的中心频率能连续地从5.853GHz被调节到29.311GHz与免费光谱11.729GHz的范围(FSR)。当阶段被调节时,频率反应的形状保持未改变。
简介:Withtheincreasingpenetrationofrenewableenergysourceswithawiderangeofoperatingconditionscausingpowersystemuncertainties,conventionalcontrollersareincapableofprovidingproperperformancetokeepthesystemstable.However,controllableordispatchableloadssuchaselectricvehicles(EVs)andheatpumps(HPs)canbeutilizedforsupplementaryfrequencycontrol.Thispapershowstheabilityofplug-inhybridEVs,HPs,andbatteries(BTs)tocontributeinthefrequencycontrolofanisolatedpowersystem.Moreover,weproposeanewonlineintelligentapproachbyusingacoefficientdiagrammethod(CDM)toenhancethesystemperformanceandrobustnessagainstuncertainties.TheperformanceoftheproposedintelligentCDMcontrolhasbeencomparedwiththeproportional-integral(PI)controllerandthesuperiorityoftheproposedschemehasbeenverifiedinMatlab/Simulinkprograms.
简介:生物织物的吸收系数是在biomedicine的一个重要参数,但是它的决心仍然是挑战。在这份报纸,我们用集中photoacoustic成像技术和圆柱的扩散纤维(CDF)的内部轻照耀确定建议一个方法目标光吸收系数。为墨水吸收器的吸收系数第一在一样的刺激通过photoacoustic和spectrophotometric大小被决定,它表明这个方法的可行性。另外,有几集中的墨水吸收器的光吸收系数被测量。最后,二维的扫描photoacoustic图象被获得。光吸收系数测量和吸收器的同时的photoacoustic成像non-invasively是方法的典型特征。这个方法能为血氧浸透,基于吸收的成像和治疗的非侵略的决心起一个重要作用。
简介:Atunablenegativecoefficientband-passmicrowavephotonicfilter(MPF)withimprovedmainlobe-to-sidelobesup-pressionratio(MSSR)byaSagnacinterferometer(SI)isexperimentallydemonstrated.ThenegativecoefficientcharacteristicofMPFisachievedbyusingthephasemodulationtechnology.Thecentralfrequencyoftheband-passMPFistunablecontinuouslybychangingthewavelengthseparationofmulti-wavelengthopticalcarriers.A38-tapnegativecoefficientband-passMPFwhoseMSSRisincreasedbyabout6.371dBisachievedinexperimentbyapodizingthetapcoefficientwiththeSagnacinterferometer.