Polarization-maintaining few mode fiber composed of a central circular-hole and an elliptical-ring core-中国Betway体育网页登陆

摘要 Weproposeanovelwaveguidedesignofpolarization-maintainingfewmodefiber（PM-FMF）supporting≥10non-degeneratemodes,utilizingacentralcircularairholeandacircumjacentelliptical-ringcore.Thestructureendowsanewdegreeoffreedomtoadjustthebirefringenceofalltheguidedmodes,includingthefundamentalpolarizationmode.Numericalsimulationsdemonstratethat,byoptimizingtheairholeandelliptical-ringcore,aPM-FMFsupporting10distinctivepolarizationmodeshasbeenachieved,andtheeffectiveindexdifferenceΔneffbetweentheadjacentguidedmodescouldbekeptlargerthan1.32×10-4overthewholeC+Lband.TheproposedfiberstructurecanflexiblytailoredtosupportanevenlargernumberofmodesinPM-FMF（14-modePM-FMFhasbeendemonstratedasanexample）,whichcanbereadilyapplicabletoascalablemodedivisionmultiplexingsystem.

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Polarization-maintaining few mode fiber composed of a central circular-hole and an elliptical-ring core

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