简介:垂直腔表面发射激光器(VCSELs)是并行光互连、高速光交换系统中最合适的光源。它具有易耦合、易封装和测试的优点。由于其独特的性能,可以较为方便地制作二维激光器阵列。基于VCSEL阵列的光电混合集成及并行光互连是当前的研究热点。本文介绍了VCSEL基本结构及设计中的关键技术,并对VCSEL在光互连中的应用进行了研究。
简介:垂直洞的射出表面的激光(VCSEL)的热稳定性数组被重新设计方山安排提高。基于热电的联合三维(3D)有限元素的模型,一个优化VCSEL数组被设计。这优化的效果试验性地被学习。有不同方山配置的VCSEL数组的力量密度特征在优化设备表演在改进了性能的不同热应力下面被获得。优化设备也从测量系列和计算热电阻显示出更好的稳定性。试验性的结果证明我们的模拟模型和优化为VCSEL数组设计是有启发性的。
简介:Amaster-slaveconfigurationusedtocontrolthenonlinearbehaviorsarisinginaverticalcavitysurfaceemittinglaser(VCSEL)withstrongexternalopticalfeedbackisestablished.Intermsofbifurcationdiagram,timeandfrequencydomain,theinfluenceofthecontinuousopticalinjectionfromthemasterVCSELonthenonlinearcharacteristicsoftheslaveisinvestigatedtheoretically.Forrelativelyweakinjection,theslavestillkeepsitsintrinsicnonlinearstate.Withincreasingtheinjectionstrength,thesenonlinearbehaviorsevolvetoperiodicfluctuation,andatlastarereplacedbythesteady-state(e.g.thecriticalinjectionparameterforsteady-stateis1.2whenexternalcavity'sreflectivityandlengthare4%and4cm,respectively).Duringthisevolutionthebifurcation-contractionphenomenaarealsoobserved.
简介:Weexperimentallydemonstratethemultiplesignalmodulationonasingleclass10Gverticalcavitysurfaceemittinglaser(VCSEL)carrierat1310nmfornextgenerationmulticast-enableddatacenternetworks.A10Gbit/sdatasignalisdirectlymodulatedontoasinglemodeVCSELcarrier.Tomaximizecarrierspectralefficiency,a2GHzreferencefrequency(RF)clocktoneissimultaneouslymodulatedontheVCSELphaseattribute.TheinherentVCSELorthogonalpolarizationbistabilitywithchangingbiascurrentisfurtherexploitedintransmissionofapolarizationbasedpulsepersecond(PPS)timingclocksignal.Therefore,wesimultaneouslytransmita10Gbit/sdirectlymodulateddata,2GHzphasemodulatedRFandapolarization-basedPPSclocksignalsusingasinglemode10GHzbandwidthVCSELcarrier.Itisthefirsttimethatasingleclass10GVCSELcarrierisreportedtotransmitadirectlymodulateddata,phasemodulatedRFclockandpolarizationbasedPPStimingsignalsimultaneouslyinasinglewavelength.AofG.652singlemodefibre(SMF)transmissionover3.21kmisexperimentallyattained.Areceiversensitivityof-15.60dBmisexperimentallyobtainedforthedirectlymodulated10Gbit/sdatasignal.A3.21-km-longSMFtransmissionintroducesapenaltyof0.23dBtothedatasignal.Thecontributionofa2GHzphasemodulatedRFandapolarization-basedPPSclocksignaltothispenaltyisfoundtobe0.03dB.AnRFsingle-sideband(SSB)phasenoisevaluesof-82.36dBc/Hzand-77.97dBc/Hzareattainedwithoutandwithsimultaneousdirectlymodulateddataandpolarization-basedPPSclocksignalsrespectivelyfora3.21-km-longSMFtransmission.Thisworkprovidesanalternativeefficientandcosteffectivetechniqueforsimultaneoushigh-speedmultipleinformationtransmissiontodifferentnetworknodeswithinadatacenternetworkthroughsharednetworkinfrastructure.
简介:摘要:光纤通信技术具有频带宽、传输容量大、低损耗、保密性好等优点,能够有效解决高速信号传输的瓶颈,目前已经成为了主流的通信方式。其中主要的通信器件为光电转换模块,光模块中垂直腔面发射激光器Vcsel与45°FA耦合、PD接收光芯片与45°FA的耦合技术为关键技术。本文利用ZEMAX仿真软件建立仿真模型,分别分析垂直腔面发射激光器Vcsel、PD接收光芯片相对45°光纤阵列组件FA位置偏移引起的耦合效率的变化进行仿真分析,为耦合工艺技术作为指导和参考。
简介:Thetime-delaysignature(TDS)ofchaosoutputina1550nmvertical-cavitysurface-emittinglaser(VCSEL)subjecttofiberBragggrating(FBG)feedbackisinvestigatedexperimentally.Autocorrelationfunction(ACF)andmutualinformation(MI)areusedforquantitativelyidentifyingtheTDSofchaos.Forvariousbiascurrents,theTDSevolutionwiththefeedbackstrengthisdifferent,astheFBGprovideswavelength-selectivefeedback.Furthermore,basedontheTDSmapoftheFBGfeedbackVCSEL(FBGF-VCSEL)intheparameterspaceoffeedbackstrengthandbiascurrent,theoptimalTDSsuppressionregions,wherethedominantpolarizationmodeofFBGF-VCSELlocatesattheedgeofthemainlobeofFBGreflectionspectrum,havebeendetermined.Finally,forcomparativepurpose,theTDSofchaosinmirrorfeedbackVCSEL(MF-VCSEL)alsohasbeenpresented,andtheresultsshowthatanFBGF-VCSELpossessesbetterTDSsuppressionperformancethananMF-VCSEL.
简介:Anoptimizeddesignoflaserrangefindingsystemusingtheself-mixingeffectinasingle-modevertical-cavitysurface-emittinglaser(VCSEL)isproposed.Inordertoimprovetherangingaccuracyandexpanddynamicmeasurementrange,weapplydifferencefrequencyanalogphase-lockedloop(PLL)insteadoffastFouriertransform(FFT)toprocesssignal,andchoosetheoptimumtriangularwavefrequencyfm=500Hzandsmallmodulationcurrent△Ip-p=0.28mAtomodulatesingle-modeVCSEL.Theexperimentresultsshowthat,withoutcontrollingthelaser'stemperature,therangingaccuracyisbetterthan2mmandthemeasurementdynamicrangeisaslargeas50-500mmwhenthesamplingtimeis0,1sandtheroomtemperatureis0-55℃.