Abstract
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 1 550 nm. 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.
© 2011 Chinese Optics Letters
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