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JOURNALOFLIGHTWAVETECHNOLOGY,VOL.13,NO.10,OCTOBER1995195510-GbthSolitonCommunicationSystemsOverStandardFiberat1.55prnandtheUseofDispersionCompensationFinlayM.box,WladekForysiak,andNicholasJ.DormAbstract-Thelimitstosolitonpropagationat10Gbt/sinuseofopticalsolitons[18]-[20].Thedispersionofstandardstandardfibersystemsat1.55pmareassessed.Weshowthatfiberissolitonsupportingintheerbiumgainband,sothatpropagationforupto200kmispossibleusing36-kmamplifiereffectivelyallthatisrequiredforsolitonpropagationistospacingsand30-pssolitons.Inordertoextendthisdistanceandincreasetherangeofusablepulsewidths,theuseofdispersionlaunchthecorrectpulseshapeattheappropriatepower.compensatingfiber,aspartofeachamplier,isevaluated.InThereareseveralotherreasonswhysolitonsareattractiveadditionthisschemesignificantlyreducestheaveragepowerforopticalcommunicationssystemsgenerallyandthereforerequirements.whytheyshouldbeconsideredasapossiblerouteforsystemupgrades.Inparticular,solitonsarecompatiblewithallopticalI.INTRODUCTIONswitchingandroutingtechnologies[21]-[24].TheabilityHEREISNOWaround50millionkilometersofopticaltoopticallyprocesssignalsisessentialifthebottle-neckTfiberinstalledworld-wide.Ofthis,mostissocalledstan-problemsencounteredatswitchingnodesaretobeovercomedurdfiber,withlow-lossinthe1.3and1.55pmwavelengthforthehighdataratesthatarecurrentlybeingproposed.regions,thesecondandthirdcommunicationswindows,andInthispaper,westudytheparticularproblemsinusinglowdispersioninthe1.3pmwindow.Generally,currentsys-solitonstoupgradestandardfibersystemswithEDFA’sto10temsworkinthissecondwindowusingelectronicregeneratorsGbdsandamplifierspacingsof36km,whichisaspecifictoretime,reshapeandamplifytheopticalsignalperiodically,butimportanttechnologicalchallengerelevanttothecurrenttomaintainthedataoverthesystemlength.ThemajorEuropeanopticalnetwork1251.Thesolitonsystemdesigndrawbackoftheseregeneratorsisthattheyoperateatafixedconstraintsarediscussedandinvestigatedbynumericalsimu-datarate,thusnecess
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