简介:Thepulseamplificationinthedispersion-decreasingfiber(DDF)isinvestigatedviasymboliccomputationtosolvethevariable-coefficienthigher-ordernonlinearSchr(o|¨)dingerequationwiththeeffectsofthird-orderdispersion,self-steepening,andstimulatedRamanscattering.Theanalyticone-solitonsolutionofthismodelisobtainedwithasetofparametricconditions.Basedonthissolution,thefundamentalsolitonisshowntobeamplifiedintheDDF.ThecomparisonoftheamplitudeofpulsesfordifferentdispersionprofilesoftheDDFisalsoperformedthroughthegraphicalanalysis.Theresultsofthispaperwouldbeofcertainvaluetothestudyofsignalamplificationandpulsecompression.