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简介：Room-temperaturetestwithhighpowerisanessentialstepbeforecouplersareinstalledonsuperconductingcavities.Anewroom-temperatureteststandisbeingdesignedatIMP.ThenewstandwillbeassembledwithaNC(normal-conducting)QWRcavity.Thepowerlossonthecavitywhencouplersareconditionedintraveling-wavemodehastobethoroughlyevaluated.Fig.1demonstratesthepowerflowintraveling-waveconditioningmode.Pe1andPe2representthepowerthatisextractedbycouplers.PfandPredenotetheforwardpowerandreflectedpower,respectively.

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简介：Reductionofmodulatorenergyconsumptionto10fJ∕bitisessentialforthesustainabledevelopmentofcommunicationsystems.Lumpedmodulatorsmightbeaviablesolutionifinstructedbyacompletetheorysystem.Here,wepresentacompleteanalyticalelectro-opticresponsetheory,energyconsumptionanalysis,andeyediagramsonabsolutescalesforlumpedmodulators.Consequentlythespeedlimitationisunderstoodandalleviatedbysingle-driveconfiguration,andcomprehensiveknowledgeintotheenergydependenceonstructuralparameterssignificantlyreducesenergyconsumption.Theresultsshowthatsiliconmodulationenergyaslowas80.8and21.5fJ∕bitcanbeachievedat28Gbdunder50and10Ωimpedancedrivers,respectively.A50Gbdmodulationisalsoshowntobepossible.Theanalyticalmodelscanbeextendedtolumpedmodulatorsonothermaterialplatformsandofferapromisingsolutiontothecurrentchallengesofmodulationenergyreduction.

简介：一个广泛地集成的40G-ROF和10-Gb/sWDM-PON多服务存取系统被建议并且试验性地示威了。这个计划由同时播送无线的独立2.5-Gb/s和10-Gb/s电线信号的40G-ROF和10-Gb/sWDM-PON的一个综合系统组成。在基础车站，它采用调整在DPSK下游的信号上策划在上游的OOK信号，它被remodulating完成，到减少基础车站的费用。传播实验在25-km-long单身者模式纤维(SMF-28)上被执行。下游的PON和ROF的敏感表明的结果表演是[?]14.5dBm并且[?]21.5dBm，分别地并且在上游的信号的敏感是[?]25.3dBm。[从作者抽象]

简介：Twotransmissioncurvedcrystalspectrometersaredesignedtomeasurethehardx-rayemissioninthelaserfusionexperimentofComptonradiographyofimplosiontargetonShenGuang-IIIlaserfacilityinChina.Cylindricallycurvedα-quartz(10–11)crystalswithcurvatureradiiof150and300mmareusedtocoverspectralrangesof10–56and17–100keV,respectively.Thedistancebetweenthecrystalandthex-raysourcecanbechangedoverabroaddistancefrom200to1500mm.Theopticaldesign,includingtheintegralreflectivityofthecurvedcrystal,thesensitivity,andthespectralresolutionofthespectrometers,isdiscussed.WealsoprovidemechanicdesigndetailsandexperimentalresultsusingaMoanodex-raysource.High-qualityspectrawereobtained.Weconfirmedthatthespectralresolutioncanbeimprovedbyincreasingtheworkingdistance,whichisthedistancebetweentherecordingmediumandtheRowlandcircle.

简介：TheaveragepoweroffiberlasershasbeenscaleddeeplyintothekWregimeinthepastyears.However,stimulatedRamanscattering(SRS)isstillamajorfactorlimitingfurtherpowerscaling.Here,wehavedemonstratedforthefirsttime,tothebestofourknowledge,thesuppressionofSRSinahalf10kWtandempumpingfiberamplifierusingchirpedandtiltedfiberBragggratings(CTFBGs).Withspeciallyself-designedandmanufacturedCTFBGsinsertedbetweentheseedlaserandtheamplifierstage,amaximumSRSsuppressionratioof>15dBinspectrumisobservedwithnoreductioninlaserefficiency.WithoneCTFBG,theeffectiveoutputpowerisimprovedto3.9kWwithabeamqualityM2factorof~1.7from<3.5kWwithanM2factorof>2;withtwoCTFBGs,theeffectivelaserpowerreaches4.2kWwithanincreasingratioof20%andanM2factorof~1.8,andfurtherpowerimprovementislimitedbythepowerandperformanceofthe1018nmpumpsources.ThisworkprovidesaneffectiveSRSsuppressionmethodforhigh-powerall-fiberlasers,whichisusefulforfurtherpowerscalingofthesesystems.

简介：ThecompressionbehaviourofPd39Ni10Cu30P21bulkmetallicglassisivestigatedatroomtemperatureupto23.5GPausinginsituhighpressureenergydispersivex-raydiffractionwithasynchrotronradiationsource.Pressureinducedstrucuralrelaxationofthebulkmetallicglassisexhibitedwithinthepressurerange.Itisfoundthatbelowabout5GPa,theexistenceofexcessfreevolumecontributestorapidstructuralrelaxation,whichgivesrisetorapidvolumeticchange.Underhigherpressure,furtherrelaxationresultsinstructuralstiffness.

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简介：用单辊甩带法制备了不含高生物毒性元素的Ti60Zr10Ta15Si15非晶薄带,并在高于其晶化开始温度的不同温度下对该非晶薄带进行了真空退火,研究了该非晶薄带在磷酸盐缓冲溶液（PBS）中的电化学腐蚀行为及热处理对其显微组织及其电化学行为的影响。结果表明,用单辊甩带法制备的Ti60Zr10Ta15Si15金属薄带为完全的非晶态结构,其玻璃转变温度和晶化开始温度分别为759K和833K,经过878K真空热处理后,薄带发生了部分晶化,在非晶的基底上析出了Ti相;经过938K热处理后,薄带发生了完全晶化,晶化相主要由Ti、Si3Ta5和SiZr以及TiSi组成。动电位极化测试表明,该非晶合金在PBS溶液中可表现出较为优异的耐蚀性能,部分晶化可进一步提高该合金的耐蚀性能,而完全晶化的合金抗腐蚀性能明显下降。

简介：Wedemonstrateanintegratedall-fibermid-infrared（mid-IR）supercontinuum（SC）sourcegeneratedbya1.95μmmasteroscillatorpoweramplifiersystemandasingle-modeZBLAN（ZrF4–BaF2–LaF3–AlF3–NaF）fiber.Themaximumaverageoutputpoweris10.67Wwithspectralbandwidthcoveringfrom～1.9to4.1μm.Thesingle-modeZBLANfiberandsilicafiberarethermal-splicedtoenhancetherobustnessandpracticabilityofthesystem.Itis,tothebestofourknowledge,thefirsthigh-powerintegratedcompactedall-fibermid-IRSCsourcebasedonthermal-splicedsilicafiberandZBLANfiber.

简介：Wehavedevelopedacost-effectiveandhighlycompact100-Gb/scoarsewavelengthdivisionmultiplexing(CWDM)transmitteropticalsubassembly(TOSA)usinglens-freehybridintegration.Toachievelargealignmenttolerances,distributedfeedbacklaserdiodes(DFB-LDs)arebutt-coupledtoafour-channelsilica-basedplanarlightwavecircuit(PLC)arrayedwaveguidegrating,withthesiliconsub-mountsandPLCadhesivelybonded.Then,aflexibleprintedcircuitisemployedtoconnecttheinternalDFB-LDsandtheexterioroftheTOSApackageforradiofrequencysignaltransmission,eliminatingtheexpensiveceramicfeed-through.ThepackagedCWDMTOSA,whichis15.8mm×7.0mm×6.0mminsize,showsaside-modesuppressionratioof>40dB,a3dBbandwidthof>18GHz,anderror-freetransmissionwithanaverageopticaloutputpowerof>0dBmanddynamicextinctionratioof>4.0dBat25.78125Gb/sovera10kmsingle-modefiberforallfourlanes.

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简介：我们在Mn50Ni40SnSbx(x=1，2，3，和4)合金。所有准备样品在房间温度与空间组一起展出B2类型结构。Sb的替换增加原子价电子集中并且减少联合起来的房间体积。作为结果，当x增加，magnetostructural转变向更高的温度很快变。在在不同磁场变化下面的磁性的熵的变化在这转变附近被探索。等温的磁化曲线展出典型metamagnetic行为，显示magnetostructural转变能被一个磁场导致。悦耳的martensitic转变和磁性的熵变化建议那Mn50Ni40SnSbx合金是应用在的吸引人的候选人固态制冷。

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