Polarization and modal field properties of quinquangular-core photonic crystal fibers
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摘要:
A kind of highly birefringent quinquangular-core photonic crystal fiber(Q-PCF)structure is proposed and analyzed by full-vector finite element method(FEM).The modal field,effective index,and birefringence properties are investigated.From the numerical results,it is found that the birefringence of the new polarization-maintaining PCFs is at least five times larger than that of the standard highly birefringent hexagonal PCFs(H-PCFs)with the same hole pitch,hole diameter,and whole hole area as that of the new PCFs at 1550 urn.Moreover,the modal field of the new PCFs could be better restricted than that of the standard highly birefringent H-PCFs; hence,the loss of fibers could be reduced.