title: Design of a pentagonal photonic crystal fiber with high birefringence and large flattened negative dispersion.
abstract: Novel pentagonal photonic crystal fiber with high birefringence, large flattened negative dispersion, and high nonlinearity is proposed. The dispersion and birefringence properties of this structure are simulated and analyzed numerically based on the full vector finite element method (FEM). Numerical results indicate that the fiber obtains a large average dispersion of -611.9  ps/nm/km over 1,460-1,625 nm and -474  ps/nm/km over 1425-1675 nm wavelength bands for two kinds of optimized designs, respectively. In addition, the proposed PCF shows a high birefringence of 1.67×10-2and 1.75×10-2at the operating wavelength of 1550 nm. Moreover, the influence of the possible variation in the parameters during the fabrication process on the dispersion and birefringence properties is studied. The proposed PCF would have important applications in polarization maintaining transmission systems, residual dispersion compensation, supercontinuum generation, and the design of widely tunable wavelength converters based on four-wave mixing.
authors.forename: Xuyou
authors.initials: X
authors.lastname: Li
authors.forename: Pan
authors.initials: P
authors.lastname: Liu
authors.forename: Zhenlong
authors.initials: Z
authors.lastname: Xu
authors.forename: Zhiyong
authors.initials: Z
authors.lastname: Zhang