简介：Anovelsingle-polarizationsingle-modephotoniccrystalfiber(SPSM-PCF)withcircularandellipticalair-holesisproposed.ThecharacteristicsoftheproposedSPSM-PCFareinvestigatedbyusingafull-vectorfiniteelementmethod(FEM)withperfectmatchedlayer(PML)boundaryconditions.TheresultsshowthattheSPSMoperationisachievedwithwiderband,andthetotaldispersionprofileoftheSPSM-PCFisdispersion-flattenedfrom1.193μmto1.384μm.ThisdispersionpropertymakestheproposedSPSM-PCFusefulforvariousapplications,suchasopticaltransmissionanddispersioncompensationforconventionalfiberatlongwavelengthbandwith500nmnegativedispersionregion.ItindicatesthatthisisagoodsolutiontorealizebroadbandSPSMoperation.

简介：我们基于silicon-on-insulator(SOI)表明photonic水晶异种波导平板，连续地由二组成与邻近波导的空气洞的不同半径连接了减少宽度的photonic水晶波导。我们理论上证明结构的传播窗户对应于对波导和它普通的传播范围在到在二波导之间的差异的反的比例。另外，指导模式的组速度能被改变从对高度或高度到低低，取决于哪个结构移植信号是输入从就在一样，设备，和变化与在二波导之间的差异成正比。用这新奇结构，我们同时认识到传播窗户和指导模式的组速度的灵活控制。

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简介：Wedemonstratelow-losshydrogenatedamorphoussilicon(a-Si:H)waveguidesbyhot-wirechemicalvapordeposition(HWCVD).Theeffectofhydrogenationina-SiatdifferentdepositiontemperatureshasbeeninvestigatedandanalyzedbyRamanspectroscopy.Weobtainedanopticalqualitya-Si:Hwaveguidedepositedat230°CthathasastrongRamanpeakshiftat480cm-1,peakwidth(fullwidthathalf-maximum)of68.9cm-1,andbondangledeviationof8.98°.Opticaltransmissionmeasurementshowsalowpropagationlossof0.8dB/cmatthe1550nmwavelength,whichisthefirst,toourknowledge,reportforaHWCVDa-Si:Hwaveguide.

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简介：Mode-andpolarization-divisionmultiplexingoffernewdimensionstoincreasethetransmissioncapacityofopticalcommunications.Selectiveswitchesarekeycomponentsinreconfigurableopticalnetworknodes.Anon-chipsilicon2×2mode-andpolarization-selectiveswitchthatcanroutefourdatachannelsontwomodesandtwopolarizationssimultaneouslyisproposedandexperimentallydemonstratedforthefirsttime,tothebestofourknowledge.Theoverallinsertionlossesarelowerthan8.6dB.Toreducetheinter-modalcrosstalk,polarizationbeamsplittersareaddedtofiltertheundesiredpolarizationsormodes.Themeasuredinter-modalandintra-modalcrosstalkvaluesarebelow-23.2and-22.8dBforallthechannels,respectively.

简介：Two-dimensional（2D）materialshaveemergedasattractivemediumsforfabricatingversatileoptoelectronicdevices.Recently,few-layermolybdenumdisulfide（MoS2）,asashining2Dmaterial,hasbeendiscoveredtopossessboththesaturableabsorptioneffectandlargenonlinearrefractiveindex.Herein,takingadvantageoftheuniquenonlinearopticalpropertiesofMoS2,wefabricatedahighlynonlinearsaturableabsorptionphotonicdevicebydepositingthefew-layerMoS2ontothemicrofiber.WiththeproposedMoS2photonicdevice,apartfromtheconventionalsolitonpatterns,themode-lockedpulsescouldbeshapedintosomenewsolitonpatterns,namely,multiplesolitonmolecules,localizedchaoticmultipulses,anddouble-scalesolitonclusters.Ourfindingsindicatethatthefew-layerMoS2-depositedmicrofibercouldoperateasapromisinghighlynonlinearphotonicdevicefortherelatednonlinearopticsapplications.

简介：Ahigh-Qmicrowavephotonicfilterusingasemiconductoropticalamplifier(SOA)-basedmode-lockingfiberringlaserisproposed,analyzedandexperimentallydemonstrated.Theproposedmicrowavephotonicfiltercanrealizeahigh-Qfrequencyresponse,itiscompactwithoutanopticalsource,anditcanbeeasilytunedbyadjustinganopticalvariabledelaylineinaringcavity.AresultwithaQ-factorofabout236andarejectionratioofabout45dBisobtained.Themeasuredresultsandthetheoreticalestimationsagreeverywell.

简介：Inthispaper,wedemonstratetheacetylehe(C2H2)sensorwithhighsensitivityusingahollow-corephotonicbandgapfiber(HC-PCF).ExperimentsformeasuringC2H2concentrationsingasmixtureareperformed.Usinga2m-longHC-PCFasgascell,thespectrumofacetyleneatn1+n3bandhasbeenmeasured,andtheP11-branchhasbeenselectedforthepurposeofsensing.Aminimumdetectivityof143partspermillionbyvolume(ppmv)forthesystemconfigurationisestimated.

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简介：Wereportontheamplificationofhigh-average-powerandhigh-efficiencypicosecondpulsesinaself-madeverylarge-mode-areaYb-dopedphotoniccrystalfiber(PCF).ThePCFwithacorediameterof105μmandacorenumericalapertureof0.05ispreparedbythesol-gelmethodcombinedwiththepowdersinteringtechnique.Thefiberamplificationsystemproducesthehighestaveragepowerof255Wata10MHzrepetitionratewitha21pspulsedurationcorrespondingtoapeakpowerof1.2MW.Thisresultexemplifiesthehigh-average-powerandhigh-peak-powerpotentialofthisspecificallydesignedfiber.