Design of Single Mode Photonic Crystal Fiber with Outstanding Characteristics of Confinenemt Loss and Chromatic Dispersion at 1.55μm Wavelength

In this article, a novel structure of photonic crystal fiber with nearly zero ultra-flattened chromatic dispersion and ultra-low confinement loss is presented. By replacing the circular air-holes of two first rings with the elliptical air-holes, a fiber with outstanding features of chromatic dispersion and confinement loss is designed. The proposed structure is optimized for operating in a wide wavelength range covering the E, S, and C communications bands. Finite difference frequency domain (FDFD) solver is applied to analyze the proposed fiber components. The designed fiber exhibits a chromatic dispersion of -0.12ps/nm/km at 1.55µm along with a slope of 0.002ps/nm2/km. Also, the other remarkable feature of this fiber is ultra-low confinement loss in order of 10-5 dB/km around λ=1.55 µm