時域有限差分法在光纖光場中的應用.pdf

1、華中師范大學碩士學位論文時域有限差分法在光纖光場中的應用姓名：曹暉申請學位級別：碩士專業(yè)：電路與系統(tǒng)指導教師：張國平2000.11.1碩士學位論文1f≮fER～j』If≮J’AbstractFinitedifferencetimedomainmethodiSanumericalcalculationmethodoffindingthesolutiontotheelectromagneticfieldinthetime—domainItt

2、ransferstheMaxwellDifferentialEquationswithtimevarianttothedifferenceequationsSOastofindthesolutiontoeachofelectromagneticfieldsSincethefoundationoftheFDTDmethod，itismainlyusedinresearchingtheeffectsofthecommonelectromag

3、neticwavesonvariousobjectsHowevertherearestillfewreportsoftheapplicationsintheresearchofopticalfiberfieldAnalyticmethodWaSgenerallyusedtesearchtheopticalfiberWiththemoreextensiveusingofopticalfiberandwimitsstructuremorea

4、ndmorecomplicated，itisimpossibletofindallaccuratesolutionThusanumericalcalculationmethodiSrequiredNumericalcalculationmethodsotherthanFD—TDmethodhavelimitationTheFD—TDmethodisdirectlyperceived，rapid，simpleinprocedure，and

5、commonlyusedItsavesthememoryspaceandthetimeofcalculation，givehigbaccuracyandhascleardataandpicturesThisthesisintroducesthismethodtothecalculationofopticalfieldsintheopticalfiberIthasarrivedatthesameconclusionswiththeanal

6、yticmethodinmanydocumentsthusprovedthefeasibilityandefficiencyoftheFDTDmethodintheresearchesofopticalfiberfieldsThisthesisfirstconvertstheFDTDmethodinorthogonalcoordinatesintothecylindricalC00rdinates，andthenanalyzesthed

7、istributionofmodefieldofstepindexopticalfiberinthreedimensionalscalarFDTDmethodFurthermore，fourkindsofopticalSOUrCeareusedasstimuli，theyaleGu船sianopticalSOUrCe，sphericalopticalsource，SINopticalsourceandCOSopticalSOUrCeS，