查看文章

This paper presents a simple index-guiding square photonic crystal fiber (SPCF) where the core is surrounded by air holes with two different diameters. The proposed design is simulated through an efficient full-vector modal solver based on the finite difference method with anisotropic perfectly matched layers absorbing the boundary condition. The nearly zero ultra-flattened dispersion SPCF with low confinement loss, small effective area as well as broadband supercontinuum (SC) spectra is targeted. Numerical results show that the designed SPCF has been achieved at a nearly zero ultra-flattened dispersion of 0±0.25ps/(nmkm) in a wavelength range of 1.38μm to 1.89μm (510nm band) which covers E, S, C, L and U communication bands, a low confinement loss of less than 10⁻⁷dB/m in a wavelength range of 1.3μm to 2.0μm and a wide SC spectrum (FWHM=450nm) by using picosecond pulses at a center …