Analysis and optimization of a dual-core dispersion compensation fiber based on a 12-fold photonic quasicrystal structure.

Abstract

In this paper, a dual-concentric-core photonic quasicrystal fiber (DCC-PQF) with a 12-fold symmetric structure has been designed to compensate for dispersion effects. To this end, a new design based on modifying the positions of the nearest air holes to the central core has been proposed for dispersion compensation, in which ultra-high negative dispersion of about -44,000 ps/(nm·km) at 1.55μm can be estimated. In addition, by optimizing structural parameters, high negative dispersion for the proposed DCC-PQF has been predicted, approximately -12,000 ps/(nm·km) at around 1.55μm, with an FWHM about 42nm in the wavelength ranges between 1529 and 1571nm, which entirely covers the C telecommunication band. Furthermore, a dispersion relation dependency on hole-to-hole spacing, first ring air hole diameters, as well as diameter of the air holes in the outer core and its position, has been investigated and discussed in detail.