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:Afullytransparentwavelengthconvengthconverterisdemonstratedbasedonfour-wavemixing(FWM)inasemiconductoropticalamplifier-fiberringlaser.TwoWDMsignalsatthewavelengthof1549.3nmand1550.9nmarerespectivelyconvertedsimultaneouslywithamaximumwavelengthshiftof6.4nmforthefirsttime.Highnondegeneration.FWMisobservedforadetuningrangeover3THz.Thisschemehasbetterconversionefficiencythanthatofconventionalsinglesemiconductoropticalamplifierconverter.
简介:Byusingsilicon-on-insulator(SOI)platform,12channelwaveguides,andfourparallel-couplingone-microringresonatorroutingelements,anon-blockingfour-portopticalrouterisproposed.Structuredesignandoptimizationareperformedontheroutingelementsat1550nm.Atdropstatewithapowerconsumptionof0mW,theinsertionlossofthedropportislessthan1.12dB,andthecrosstalkbetweenthetwooutputportsislessthan-28dB;atthroughstatewithapowerconsumptionof22mW,theinsertionlossofthethroughportislessthan0.45dB,andthecrosstalkbetweenthetwooutputportsisbelow-21dB.Routingtopologyandfunctionaredemonstratedforthefour-portopticalrouter.Theroutercanworkatninenon-blockingroutingstatesusingthethermo-optic(TO)effectofsiliconfortuningtheresonanceofeachswitchingelement.Detailedcharacterizationsarepresented,includingoutputspectrum,insertionloss,andcrosstalk.Accordingtotheanalysisonallthedatalinksoftherouter,theinsertionlossiswithintherangeof0.13—3.36dB,andthecrosstalkislessthan-19.46dB.Theroutercanmeettheneedoflarge-scaleopticalnetwork-on-chip(ONoC).
简介:Accordingtothedipoletransitionselectionrulesandbychoosingpropertransitionchannels,itisfoundthattheinvertedY-typefour-levelschemecanbeclassifiedintoninedifferent2nd-ordersubschemeswhenusingcorrespondinglaserfields,andtheycanbefurtherclassifiedintoeighty3rd-ordersubschemesindetailaccordingtodifferentexcitingintensitiesthatareappliedindifferentchannels.Inthispaper,thestructuremultiformityofinvertedY-typefour-levelschemeisdiscussedandthedemonstrationsonsomesubschemesarealsogiven.Atthesametime,thesubschemeswhichhavebeenstudiedarepointedout,butmostofthemhavenotbeenresearchedtothebestofourknowledge.
简介:All-opticalregeneratorscanbeusedtosuppressamplifiedspontaneousemission(ASE)noiseintroducedbycascadederbiumdopedfiberamplifiers(EDFAs)inopticalfibercommunicationsystemsandleadtotheimprovementofopticalreceiversensitivity.ByintroducingtheQ-factortransferfunction(QTF),weevaluatetheQ-factorperformanceofdegeneratefour-wavemixing(DFWM)regeneratorswithclockpumpandrevealthedifferencesbetweentheoptimalinputpowersdeterminedfromthestaticanddynamicpowertranferfunction(PTF)andtheQTFcurves.Oursimulationshowsthattheclock-pumpregneratoriscapableofimprovingtheQ-facorandreceiversensitivityfor40Gbit/sASE-degradedreturn-to-zeroon-offkeying(RZ-OOK)signalby2.58dBand4.2dB,respectively.