A New Design of As2Se3‎ Chalcogenide Glass Photonic Crystal Fiber with Ultra-Flattened Dispersion in Mid-Infrared Wavelength Range

In this paper, we report a new design of as2se3‎ chalcogenide glass photonic crystal fiber (pcf) with ultra-flattened dispersion at mid-infrared wavelength range. we have used the plane wave expansion method (pwe) for designing the structure of as2se3‎ glass pcf at different wavelength windows. in the proposed structure with hole to hole spacing and , the negative dispersion is -1025 ps/nm/km at the wavelength of 1.55µm, and also an ultra-flattened dispersion is achieved at the wavelength range of 3.5-18?m. hence such pcfs have a high potential to be used as dispersion compensating fibers at 1.55µm wavelength in optical communication systems. the ultra-flattened dispersion at the wavelength range of 3.5-18?m can be employed to achieve high power super-continuum generation. the nonlinear coefficient of the proposed pcf is 1.5 w-1m-1 at the wavelength of 1.55µm. chalcogenide glasses are known to have both high transparency and nonlinearity in a wide range of infrared wavelengths compared to silica glasses.