简介:40-GHzclockmodulatedsignalasapumptoimprovetheefficiencyoffour-wavemixing(FWM)-basedwavelengthconversionina26.5-kmdispersionshiftedfiber(DSF)isinvestigated.TheexperimentalresultsdemonstratethattheconjugatedFWMcomponenthashigherintensitywiththeclockpumpingthanthatwiththecontinuous-wave(CW)lightpumping.TheimprovementofFWM-basedwavelengthconversionefficiencyisnegligiblewhenthepumppowerislessthanBrillouinthreshold.ButwhenthepumppowerisgreaterthanBrillouinthreshold,theimprovementbecomessignificantandincreaseswiththeincrementofpumppower.Theimprovementcanincreaseupto9dBifpumppowerreaches17dBm.
简介:Weexperimentallydemonstratea4-Gb/sradio-over-fiber(RoF)systemwith40-kmfiberand2-mwirelessdistancedownstreamat100-GHzcarrier.Tothebestofourknowledge,thisisforthefirsttimeinChinatorealizeopticalwirelesslinkat100GHz.Inthisletter,simpleintensitymodulatorwithdirectdetector(IM-DD)modulationisemployedandopticalpowerpenaltyafter40-kmsinglemodefiber(SMF)-28and2-mairlinkis3.2dBwithbit-error-rate(BER)at1×109.