An Elliptical-Shaped Core Residual Dispersion Compensating Octagonal Photonic Crystal Fiber

摘要

A residual dispersion compensating photonic crystal fiber (PCF) is proposed having elliptical-shaped core and octagonal structure with isosceles triangular-latticed cladding. The finite element method with circular perfectly matched layer is used to investigate the guiding properties. It is demonstrated that it is possible to obtain average dispersion of −544.7 ps/(nm.km) in a wavelength range of 1.46–1.70 (mu ) m with ultrahigh birefringence of (2.2times 10^{-2}) and nonlinear coefficient of 52.7 W (^{-1}) km (^{-1}) at a 1.55- (mu ) m wavelength. Besides, the proposed PCF shows confinement losses <42.4 and 0.012 dB/km for five and eight rings, respectively.