光學隔離器.pdf

1、華中科技大學碩士學位論文光學隔離器姓名：季杭峰申請學位級別：碩士專業(yè)：物理電子學指導教師：黃德修2002.7.5華中科技大學碩士學位論文AbstractOpticalcommunicationtechnologyisrapidlydevelopedforwardtohighersinglechanneltransmissionrateandmoremultiplexwavelengthssoastosuitvariedcommunica

2、tiontrafficdemandsintheseyearsThereforetheopticalsourceusedinthefibercommunicationsystemsshouldimposemorerequirements，includingbetterwavelengthstabilitypowerstabilityandsoON。Semiconductorlaserwhichiswidelyusedintheoptica

3、lcommunicationsystemshassomeadvantagessuchassimplestructure，smallsizeandeasytoassemble，butissusceptibletothebackwardlightinthesystems“10stabilizetheopticalSOurcetheopticalisolatorisusedtoblockoffthebackwardlightTheisolat

4、orisakindofnon—reciprocalpassivedevicethatbringslialeinsertionlosstothetbrwardlightwhilegreatlosstothebackwardlightItiswidelyusedintheopticalcommunication，coherentcommunication，preciseopticalmeasurement，etc，tnfactanywher

5、eshouldavoidtheinfluenceofbackwardlightmustuseisolator_IsolatorcallbedividedintopolarizationdependenttypeandpolarizationindependenttypeaccordingtoitspolarizationcharacteristicsTheformertyperequirestheopticalsourcebehighl

6、ypolarizedsoitisofteninstalledinsidethelasermodule；thelatertypeisinsensitivetothelightlspolarization，soitcallbeusedinlineOpticalisolatorhasbeenresearchedandappliedformorethantwentyyears，Bothofthesetwotypesisolator(single

7、stage)haveplayedamoreimportantroleintheopticalcommunication，buttheyarenolongermeettequirementsofhigh—speedopticalcommunicationsystems，suchashigherisolation10werpolarizationdependentlossandpolarizationmodedispersion，wider

8、operatingwavelengthandtemperaturerangetnthisthesiswewillresearchanddevelopdualstagefreespaceisolator(polarizationdependenttype)anddualstageinlineisolator(polarizationindependenttype)Themainworkincludes：Researchontheworki