Abstract
A novel hexagonal lattice photonic crystal fiber (PCF) design with two triangular arrays of semiminor-axis-decreasing elliptical air holes is proposed in this paper. The PCF characteristics based on the full-vector finite element method with perfect matched layer boundary conditions show that a wider bandwidth and dispersion-flattened profile for single-polarization single-mode (SPSM) operation is achieved. The SPSM operation can be realized in a spectral region ranging from the wavelength of 1.4 to 2 μm. The profile with convex and dispersion-flattened dispersion is obtained from the wavelength of 1.391 to 1.624 μm.
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