Anopposite-chirpedfrequency-domainopticalparametricamplification（OC-FOPA）designisdemonstratedandnumericallyverified.Thisschemecombinesbothanultrabroadseedinggenerationandthesubsequenteffectiveamplificationinonesingleopticalparametricamplificationstage.Basedonaslightlyasymmetrical4-fopticalsystem,thespectralcontentsofbothpumpandsignalwavesarespectrallydispersedwithoppositespatialchirps,tobroadentheinitialidlerseeding.Viaaproperlydesignedfan-outperiodicallypoledLiNbO3chip,nearlyperfectquasiphasematchingcanberealizedacrossthefullspectrum,wherebyeachinpidualspectralpairpreciselymapstoitsrequiredgratingperiod.Full-dimensionalsimulationsbasedoncommercial110fs（FWHM）nearinfrared（near-IR）lasersat790and1030nmarequantitativelydiscussed,andfew-cyclemid-IRlaserpulses（60fsat3.4μm）plusahighconversionefficiencyexceeding50%aretheoreticallypredicted.Bymeansofahigh-powerpumpsource,theOC-FOPAschemecanbealsoappliedtodirectlyproducehigh-intensitycarrier-envelope-phase-stabilizedmid-IRidlerpulses.
