首页 | 本学科首页   官方微博 | 高级检索  
相似文献
 共查询到20条相似文献,搜索用时 250 毫秒
1.
1 Introduction  Electromagneticallyinducedtransparency(EIT)hasattractedmuchattentionduetoitsextensiveapplications,suchasquantumnoisereduction[1] ,pulsematching[2 ,3] ,andenhancementofnonlinearmixing[4 ,5] .Inessence,EITisanatomiccoherenceinducedbyastrongcouplingl…  相似文献   

2.
1 Introduction  Cr4 ∶YAGhasbeenusedwidelyasasaturableabsorptionQ switchingtoachievethe giant pulseinNd∶YAGlaser[1,2 ] .Inaddition ,Cr4 ∶YAGisalsoagoodlasercrystaloverthewavelengthrangefrom 1 3 4 0nmto1 580nmtogeneratefspulse[3 ,4 ] .Recently ,withthediscoveryofthesatur…  相似文献   

3.
1 Introduction  Thesynthesisofcarbonnitridethinfilmshasbeenthesubjectofintensestudysincethetheoretical predication[1,2 ] andexperimentalrealization[3] of β C3N4thinfilms.Manyattemptshavebeenmadetosynthesizethismaterialby physicalandchemicalmethods ,suchasreact…  相似文献   

4.
1 Introduction  Recently ,laser performanceofnewYb3 ∶KY (WO4) 2 crystal (Yb3 ∶KYW )hasbeenobtainedat 1 0 2 5nm[1] .TheYb3 ∶KYWcrystalisa promisingmaterialformicrochipand passivemode lockedlaserstunableintherangeof 1 0 2 0~ 1 0 6 0nm .ItisknownthatKerr lensmode lockingtechniq…  相似文献   

5.
1 Introduction  Inrecentyears,thedifferentialabsorptionlidar (DIAL)hasbecomethepowerfultooltomeasuretheatmospheric pollution .NO2 ,itscharacteristicabsorptionwavelengthsat 4 4 8.1nmand 4 4 9.1nm ,isoneofthemostimportantpollutioninatmosphere .Apowerfuldyelaserpumped…  相似文献   

6.
1 Introduction  Opticalfibervoltagetransformersarebeingdevelopedforuseintheelectricpowersystem[1 ,2 ] ,becauseoftheiroutstandingadvantagessuchassimpleinsulantionstructure,immunitytoelectromagneticinterference ,nosaturationeffect,noflammablematerialssuchasoi…  相似文献   

7.
1 Introduction  Pupil planefilterscanbeusedtochangethelightintensitydistributioninthefocalplane ,sotheyhavepotentialapplicationsintheareasofopticaldatastorage[1~ 3 ] ,lithography[4] ,andmicroscopy[5~ 7] .Manypupilfiltershavebeenstudied ,suchasfilterswithvariedamp…  相似文献   

8.
1 Introduction  Thenegative groupdelaydispersion(GDD) providedbyapairofprismordoubleprismshasplayedanimportantroleinintracavity[1] orextracavity[2 ] dispersioncompensationforultra shortpulse generationduetoitsadvantages,suchaslowloss,easyalignmentandcompactne…  相似文献   

9.
1 Introduction  Alongperiodfibergrating (LPFG)isanovelpassivefiberelementarisinginrecentyears[1] .SeveralapplicationsofLPFGhavebeenfound ,suchas gain profileflattenedfilter,band rejectionfilter,andtemperature ,strainornewchemicalsensors[2 ,3] .ItcanbeUV writtenor…  相似文献   

10.
1 Introduction  Someusecontacttechniques(suchasprofilometry,scanningprobemicroscopy)andtheothersusenoncontacttechniques,mostofwhichareactuallyopticalmethods,andlightscattering[1,2],ellipseometry[3]andsurfaceplasmonspectroscopy[4]aretheexamples.Uptonow,thedeter…  相似文献   

11.
1 Introduction  Opticaldatastoragebymarkingofmicron sizedspotsonadiskwithalaserisanareawithongoingresearchactivity .Opticaldiskdatastoragehasthecombinedadvantagesofhighstoragedensity ,diskremovable,andlargehead diskworkingdistance.Inrecentyears ,write once…  相似文献   

12.
1IntroductionSOAwilbeoneofthekeycomponentsinthealopticalnetworkinthefuture.SOAhasmanyveryimportantapplications,suchaswavelen...  相似文献   

13.
1 Introduction  Withincessantappearanceofnewlasercrystalswitheverwiderfluorescencespectrum,suchasTi∶sapphire,Cr4 ∶YAG,theprelimi...  相似文献   

14.
1 Introduction  Inrecentyears,greatattentionhasbeenpaidtohighpeakpowerall solid statepulsedblue greenlasersforsomeapplicationssuchasspectroscopy,display ,opticaldatastorage ,underseacommunicationsandsoon .Theintracavityfrequencydoublingofacwdiode laser pump…  相似文献   

15.
1 Introduction  InWDMopticalfibercommunicationandnetworkapplications,manyopticalcontrollabledevicesaredemanded ,suchaschannelgain/ powerequalizer,channelselector,opticalswitching ,andadd/dropmultiplexer,etc .Inmanycases,wavelengthtunabilityisneeded .Thebulkw…  相似文献   

16.
1 Introduction  Therapidgrowthoffiberopticsystemsandapplicationshasincreasedthedemandforhigh performanceandlow lossfiberopticcomponentslikecouplers,switches,modulators,detectorsandsources.Thishasresultedinincreasinginterestinintegrateddevices ,wherethese…  相似文献   

17.
1 Introduction  Inphotorefractivecrystal,manyapplications,suchasimageamplificationandimagestorage ,needtousethepropertyofhighdiffractionefficiency .Someauthors[1] havereferredthathighdiffractionefficiencyinphotorefractiveLiNbO3crystalcanbeobtainedbywriting…  相似文献   

18.
1 Introduction  ThefiberBragggrating (FBG) ,asanewpassivesourceelement,hasmanyimportantadvantagessuchasvolumeminuteness ,compatibilitywithfibersystem ,collectionfrequencyforwavelengthandsoforth .Thus ,FBGisplayinganimportantroleinthefibergratingsensingtechn…  相似文献   

19.
1 Introduction  Extractingusefulinformationaboutthedynamicalscatterersfromthetemporalfluctuationsofscatteringlightfieldhasbeenstudiedformanyyears.Thedevelopmentofdiffusing wavespectroscopy[1~ 3 ] (DWS)hasextendedthetraditionalapplicationsinsingle scatterin…  相似文献   

20.
1 Introduction  Severalbiaxialcrystals ,suchasKTP ,LBO ,havesomeexcellentproperties,suchaslargenonlinear (NL )coefficients,widewavelengthrangesoftransmission ,andeasilygrowinglargesizecrystalwithhighquality .Thebiaxialcrystalshavebeenextensivelyusedinlaserfr…  相似文献   

设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号