Abstract:
Theinfluenceofphaseshiftdriftandsplittingratioonsidebandssuppressionratioofoptical
millimeterwaveandbiterrorrate(BER)ofradiooverfiber(ROF)systemaregreat.Fortheschemeof
opticalmillimeterwavegenerationwithoctupling-frequencyusingtwocascadedMach-Zehndermodulators,
withthemethodofexpandingBesselseries,anexactanalyticalsolutionforopticalmillimeterwave
affectedbyphaseshiftdriftandsplittingratiowasderived.Itfollowedthattheundesiredsidebands
suppressionratiowas35.9dBwhenthesplittingratiodeviationwas0.001andphaseshiftdriftwas1.
Theharmonicinfluencecouldbeneglectedinthiscase.Simulationresultsshowthatfor0.001splitting
ratiodeviationand1phaseshiftdrift,thepowerpenaltyvalueis0.001dBatBERof10-10inback-to-back
signaltransmission.Thepowerpenaltyvalueis0.145dBafter20kmtransmission.Thesystemperformance
isgood.